After the thwarting of an MTB-A attack on Galveston Bay due to Roman Sloops, the Sultanate is looking at acquiring vessels of this type. Currently, 20 Minesweeper/Patrol craft are in existence, but the MS-1 class has three primary concerns, those being lack of FC, only a single gun, and they're slow. These three concerns were all apparent in the Galveston Bay operation as the similar Roman Sloops slow speed, lack of FC, and paucity of firepower meant that they were practically irrelevant to the operation outside of initially spotting. They could not get into place to block either ingress or egress, and couldn't appreciably contribute to the gunfire.
The Sultanate also has a secondary concern due to the war. The original plan was to use the Toucan-class cruisers, modernized in 1916, as 'station cruisers' at the various colonies. The Sultanate has colonies spread fairly broadly worldwide, with a 'near colony' at the Windwards (and Caicos at the moment, we shall see how that progresses in December-1914), and 'far colonies' at Angola, Zealand, and Wake. Any station ships would have to have sufficient endurance to provide patrol duties in those areas, and would have to be sufficiently powerful to create a deterrent against raiding vessels or local unrest.
This initial design (possibly for late 1915 production, could be 1916 though) brings in minesweeping and limited Marine capabilities combined with a 'best in class' armament of 2 twin 100mm guns and a suite of machine guns for anti-aircraft or anti-boat use. Splinter protection sufficient to protect against fire from many MTBs and up to 100mm HE splinters is also included for the bridge and main guns. Unlike previous patrol vessels, these would have a relatively high top speed that would allow them to evade cruisers or pursue torpedo craft.
Sloop X, Aztec Sloop laid down 1915
Displacement:
499 t light; 526 t standard; 591 t normal; 642 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(294.90 ft / 291.99 ft) x 26.25 ft x (6.56 / 6.94 ft)
(89.88 m / 89.00 m) x 8.00 m x (2.00 / 2.12 m)
Armament:
4 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 200 per gun
Quick firing guns in deck mounts, 1915 Model
2 x Twin mounts on centreline ends, evenly spread
8 - 0.31" / 8.0 mm 70.0 cal guns - 0.02lbs / 0.01kg shells, 2,000 per gun
Machine guns in deck mounts, 1915 Model
4 x Twin mounts on sides, evenly spread
Weight of broadside 129 lbs / 59 kg
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm - -
- Conning towers: Forward 0.79" / 20 mm, Aft 0.00" / 0 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 14,475 shp / 10,799 Kw = 30.00 kts
Range 5,000nm at 10.00 kts
Bunker at max displacement = 117 tons
Complement:
59 - 77
Cost:
£0.096 million / $0.385 million
Distribution of weights at normal displacement:
Armament: 22 tons, 3.7 %
- Guns: 22 tons, 3.7 %
Armour: 5 tons, 0.8 %
- Armament: 4 tons, 0.6 %
- Conning Tower: 1 tons, 0.2 %
Machinery: 296 tons, 50.2 %
Hull, fittings & equipment: 158 tons, 26.7 %
Fuel, ammunition & stores: 91 tons, 15.4 %
Miscellaneous weights: 18 tons, 3.1 %
- Hull above water: 3 tons
- On freeboard deck: 12 tons
- Above deck: 3 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
162 lbs / 74 Kg = 5.3 x 3.9 " / 100 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 0.8 ft / 0.2 m
Roll period: 12.2 seconds
Steadiness - As gun platform (Average = 50 %): 65 %
- Recoil effect (Restricted arc if above 1.00): 0.25
Seaboat quality (Average = 1.00): 0.72
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.411 / 0.422
Length to Beam Ratio: 11.13 : 1
'Natural speed' for length: 17.09 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 91
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 10.83 ft / 3.30 m, 10.17 ft / 3.10 m
- Forward deck: 30.00 %, 10.17 ft / 3.10 m, 9.19 ft / 2.80 m
- Aft deck: 35.00 %, 9.19 ft / 2.80 m, 8.20 ft / 2.50 m
- Quarter deck: 15.00 %, 8.20 ft / 2.50 m, 8.20 ft / 2.50 m
- Average freeboard: 9.26 ft / 2.82 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 175.3 %
- Above water (accommodation/working, high = better): 140.3 %
Waterplane Area: 4,749 Square feet or 441 Square metres
Displacement factor (Displacement / loading): 50 %
Structure weight / hull surface area: 23 lbs/sq ft or 111 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 0.77
- Overall: 0.52
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather
2.4t - 1908 FC
1t - Additional Searchlights
8t - Minesweeping Gear
4t - 2t patrol launch
3t - Space for up to 12 Marines for colonial patrol duties
Considerations being looked at in the "B-Build" are to remove minesweeping gear, leaving that duty to the slower MS-1 class of which there are sufficient numbers to put one or two on colonial stations with the sloops, in favor of either a single twin or triple torpedo launcher or improved splinter protection to 24mm. The former would give some threat against larger ships, though MTB-Bs are planned to be stationed in colonial areas for duties there, the latter would protect against 140mm HE splinters, the largest fired by anticipated destroyer-level threats. A third option for removing minesweeping gear would be to raise the freeboard further....as it stands she has 'destroyer grade' performance at speed in a seaway, though one would expect that her seakeeping performance at a more normal 'patrolling speed' would be more than sufficient for inshore and limited offshore work.
We had a big discussion on mounts and requisite width back in the spring and the players decided that if SS doesn't trigger a warning, it's ok.
I was in the 'I think there should be rules' camp, we (or maybe just I) didn't win.
That said, a twin 100mm on an 8m beam with a .411 BC seems unreasonable, but hey SS doesn't give a warning.
Oil firing : If this is a station ship, and you find yourself in a similar situation to the Caicos, which of your colonies produced oil in the early 1900s ? You can ship it from home, you can buy it abroad, but I don't believe any of those places produce it themselves. For my part, Parthia is a huge oil producer, but I've continued building my vessels with partial coal firing in some cases, so they can be deployed to colonies and use that to day to day operations without oil stocks being a concern.
FC - I don't care for fractional tons. Feel free to round 0.1 - 0.4 down.
8t Minesweeping gear... this gets back into the 'what am I supposed to do with this'. Extrapolating from how I treated Snip's , basically you get some paravanes with floats, but they aren't very robust and will only clear a limited number of moored mines. Which may fit the need.
1t searchlight... basic searchlights are part of ships fittings. This means you have a bonus one.... ?
2t ship's launch... typical ships boats are part of the ships fittings, so this "buys" a bonus 1 ton launch. "Boats: Typical ship's boats are part of fittings. Extra boats, landing craft, or attack craft require 2 t of miscellaneous weight per tonne of boat weight" ...which per troops below would hold 4 guys ?
3t for 12 Marines. From Ship design guidelines, Troops: 1 t per four troops for short-ranged landing craft. 2 t per troop for long-term (> 1 day) embarkment., so what this buys is <24hrs on board.
I just round the FC cost up to the next whole number. If nothing else, it gives a bit of slack if I add some light guns later.
BBy, Aztec Battleship laid down 1916
Displacement:
24,582 t light; 25,970 t standard; 27,617 t normal; 28,934 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(656.03 ft / 652.56 ft) x 91.21 ft x (24.61 / 25.61 ft)
(199.96 m / 198.90 m) x 27.80 m x (7.50 / 7.81 m)
Armament:
9 - 14.17" / 360 mm 45.0 cal guns - 1,435.69lbs / 651.22kg shells, 100 per gun
Breech loading guns in turret on barbette mounts, 1916 Model
3 x 3-gun mounts on centreline, forward evenly spread
1 raised mount
14 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
Quick firing guns in deck and hoist mounts, 1916 Model
6 x Twin mounts on sides, aft evenly spread
1 x Twin mount on centreline, aft deck aft
1 raised mount
4 - 2.76" / 70.0 mm 50.0 cal guns - 11.09lbs / 5.03kg shells, 300 per gun
Anti-air guns in deck mounts, 1916 Model
4 x Single mounts on centreline, aft evenly spread
4 raised mounts
16 - 0.31" / 8.0 mm 70.0 cal guns - 0.02lbs / 0.01kg shells, 2,000 per gun
Machine guns in deck mounts, 1916 Model
8 x Twin mounts on sides, evenly spread
Weight of broadside 13,959 lbs / 6,332 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.6" / 320 mm 426.51 ft / 130.00 m 16.40 ft / 5.00 m
Ends: 1.97" / 50 mm 95.14 ft / 29.00 m 16.40 ft / 5.00 m
130.91 ft / 39.90 m Unarmoured ends
Main Belt covers 101 % of normal length
- Torpedo Bulkhead - Additional damage containing bulkheads:
1.57" / 40 mm 393.70 ft / 120.00 m 22.97 ft / 7.00 m
Beam between torpedo bulkheads 72.18 ft / 22.00 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.6" / 320 mm 4.72" / 120 mm 12.6" / 320 mm
2nd: 4.33" / 110 mm 1.97" / 50 mm 3.94" / 100 mm
- Armoured deck - multiple decks:
For and Aft decks: 3.54" / 90 mm
Forecastle: 0.00" / 0 mm Quarter deck: 2.95" / 75 mm
- Conning towers: Forward 4.33" / 110 mm, Aft 4.33" / 110 mm
Machinery:
Oil fired boilers, steam turbines,
Electric motors, 2 shafts, 54,841 shp / 40,911 Kw = 24.00 kts
Range 6,000nm at 14.00 kts
Bunker at max displacement = 2,964 tons
Complement:
1,070 - 1,392
Cost:
£4.024 million / $16.097 million
Distribution of weights at normal displacement:
Armament: 2,924 tons, 10.6 %
- Guns: 2,924 tons, 10.6 %
Armour: 9,310 tons, 33.7 %
- Belts: 3,923 tons, 14.2 %
- Torpedo bulkhead: 527 tons, 1.9 %
- Armament: 1,969 tons, 7.1 %
- Armour Deck: 2,721 tons, 9.9 %
- Conning Towers: 170 tons, 0.6 %
Machinery: 2,043 tons, 7.4 %
Hull, fittings & equipment: 9,397 tons, 34.0 %
Fuel, ammunition & stores: 3,035 tons, 11.0 %
Miscellaneous weights: 908 tons, 3.3 %
- Hull below water: 515 tons
- Hull above water: 193 tons
- Above deck: 200 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
36,540 lbs / 16,574 Kg = 25.7 x 14.2 " / 360 mm shells or 5.9 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 5.7 ft / 1.7 m
Roll period: 16.1 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.65
Seaboat quality (Average = 1.00): 1.08
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.660 / 0.664
Length to Beam Ratio: 7.15 : 1
'Natural speed' for length: 25.55 kts
Power going to wave formation at top speed: 47 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 19.69 ft / 6.00 m, 18.04 ft / 5.50 m
- Forward deck: 30.00 %, 18.04 ft / 5.50 m, 14.76 ft / 4.50 m
- Aft deck: 35.00 %, 14.76 ft / 4.50 m, 14.76 ft / 4.50 m
- Quarter deck: 15.00 %, 14.76 ft / 4.50 m, 14.76 ft / 4.50 m
- Average freeboard: 16.04 ft / 4.89 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 88.7 %
- Above water (accommodation/working, high = better): 127.1 %
Waterplane Area: 46,013 Square feet or 4,275 Square metres
Displacement factor (Displacement / loading): 103 %
Structure weight / hull surface area: 180 lbs/sq ft or 881 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.05
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
515t - Electric Drives
293t - 1912 FC
25t - LR Radio
50t - Flag Accommodations
25t - Night Acquisition Devices (1908)
Decks:
Main - 75mm + 15mm Splinter
Quarter - 60mm + 15mm Splinter
Belts: End Belt is Aft of Main Belt covering steering gear, shafts, etc. Foc'stle is true AoN and is outside of raft body
Haven't settled on a class name yet, or even how many will be built. The Sultanate finds itself with such a dearth of capital units in the aftermath of the war that the Implacables sitting in the fitting out basin of Veracruz are the only battleships in the fleet, not scheduled to be commissioned until January of 1916.
Designs for ships from a 27kt Fast Battleship (had been put forward before) to a selection of 21 and 24kt battleships with 12 x 360mm guns were considered. There was even significant talk of eschewing battleships entirely for an all-cruiser navy with Battlecruisers as the capital ship. However, despite the decisive rout at Ironclad Bay, the ultimate lessons gleaned from it were that a lack of suitable fire control, coupled with inadequate guns both in numbers and firepower, and inadequate armor was responsible. So any new vessel would need heavy armor able to withstand a significant pounding, along with more substantial flotation to allow the ship to remain combat capable even after suffering penetrations to the armor. The 12 gun designs were discarded as too large and complex to allow for continued production of cruisers and light units to replace losses suffered during the war. 280mm designs were also discarded out of hand as insufficient in firepower to match against the 340mm guns Roman units were bringing to bear, this is also considered to be the main and most glaring weakness of the Implacable design.
Ultimately a 9 gun 360mm battleship with a 24kt speed allowing it to match the Implacables for battle line management was decided upon. The unusual all-forward arrangement of the armament was considered to help in a pursuit as it allows all three turrets to fire at more extreme angles. Main Belt armor and Deck armor were maximized, and the fire control center moved from the conning tower to under the main armor deck. Range was acceptable even if low by standards.
Protection for the areas outside the citadel was carefully considered. As the class was primarily designed for Caribbean operations and not for high speed runs on the open ocean, the forecastle area was left completely unarmored. This was felt to be sufficient to allow heavy AP shells to overpenetrate without detonating inside the ship, while the holes punched would not be letting water into the main 'raft body' of the ship. Aft, the threat to the drives and steering gear by splinters and smaller shells from destroyers and light cruisers drove an end belt and light deck.
With the relatively low speed compared to length, power requirements were relatively minimal, even with the added tonnage of turbo-electric drives. Only two shafts are to be fitted, as the redundancy is not felt to be a necessity in waters closer to home, and the removal of outboard shaft runs adds to the durability of the ship itself and it's TDS, and minimizes the possibility of a low shell or torpedo hit from causing a catastrophic shaft warpage.
The other unique change to the ship design is the cutting of armor protection for the bridge to merely splinter and light shell protection. The conning towers were not hit during the battle, and the captains and senior officers preferred to work in the unarmored bridge sections rather than in the confines of the conning tower anyway. With that in mind, two armored bridge sections and a communications trunk were designed in, each individually unable to take a heavy shell hit, but the redundancy able to ensure continued operations even after being hit.
I guess there's no time like complete annihilation to reset one's fleet ideas.
They're economic, no doubt, decent turn of speed and armament. I wonder if the conning tower might still be a bit too heavily armored to avoid setting off heavy calibre hits.
I like it, nasty little customer. My one thought is that moving to twin M&H is a bit of a big leap, and would only allow for simultanious tracking a smaller number of targets over single mounts. Since so far we have mostly be dealing with saturation attacks when it comes to torpedo craft, I wonder if keeping singles would be better for that reason.
Quote from: snip on December 21, 2020, 03:38:19 PM
I like it, nasty little customer. My one thought is that moving to twin M&H is a bit of a big leap, and would only allow for simultanious tracking a smaller number of targets over single mounts. Since so far we have mostly be dealing with saturation attacks when it comes to torpedo craft, I wonder if keeping singles would be better for that reason.
Good point. My logic is threefold. 1) twin mount and hoist is already in the pipe. It would tax the research budget to add yet another mount. 2) it's less likely with a battleship in a fleet to get a full saturation attack without being supported. 3) a single gun firing on a single target is horrible for FC. 4 guns is the standard for FC. If the secondary is at the point of independent fire, having 14 guns firing at 14 targets or 14 guns firing at 7 targets is probably going to go to the 7 targets being more efficiently serviced. Overall I think that 7 mounts with significant protection for their gunners to calmly engage destroyers and torpedo boats is superior to 14 smaller mounts firing at half the rate.
You do get a free single deck mount (with or without a hoist) will all guns 209mm or lower, so no need to research anything there. The rest makes sense.
Quote- Conning towers: Forward 4.33" / 110 mm, Aft 4.33" / 110 mm
One hit could destroy the ship's command.
IMO, update to 320mm
Quote from: Jefgte on December 21, 2020, 05:05:19 PM
Quote- Conning towers: Forward 4.33" / 110 mm, Aft 4.33" / 110 mm
One hit could destroy the ship's command.
IMO, update to 320mm
That's the point of having two of them. Plus the conning tower has always been a death trap even when it's thick. If it gets hit there's going to be carnage. Better off having it splinter protected and redundant than putting everything into one spot in my opinion.
I seem to recall that there is a bug with the aft conning tower item where Springsharp does not count its weight.
Time to put 20" armor on that aft tower! ;D
Quote from: snip on December 21, 2020, 05:27:12 PM
I seem to recall that there is a bug with the aft conning tower item where Springsharp does not count its weight.
I'll test and verify. But as I recall it did count the weight.
After much hand-wringing, the Naval Ministry has concluded that the need for smaller vessels in quantity outweighs the need for 'Frigate' cruisers in the short term. Two revised proposals for a Frigate for the 1917 budget cycle are put forward. Principle in difference is the speed/range and secondary armament, most other things being generally equal. A hard 'cap' of 9000 tons light displacement was put in place due to budgetary restrictions, obviously by scaling the design up to 10,000t it could be 'improved', but this is seen as an endless cycle and larger cruisers are seen as something that could be built with 28cm guns as 'light battlecruisers'.
First Proposal, with a 100mm secondary battery.
Atlatl, Aztec Frigate laid down 1917
Displacement:
8,996 t light; 9,355 t standard; 10,466 t normal; 11,355 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(584.61 ft / 580.71 ft) x 62.47 ft x (18.70 / 19.94 ft)
(178.19 m / 177.00 m) x 19.04 m x (5.70 / 6.08 m)
Armament:
8 - 7.09" / 180 mm 50.0 cal guns - 188.39lbs / 85.45kg shells, 140 per gun
Breech loading guns in deck and hoist mounts, 1917 Model
4 x Twin mounts on centreline ends, evenly spread
2 raised mounts - superfiring
8 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 200 per gun
Quick firing guns in deck mounts, 1917 Model
8 x Single mounts on sides, evenly spread
2 - 2.76" / 70.0 mm 50.0 cal guns - 11.09lbs / 5.03kg shells, 300 per gun
Anti-air guns in deck mounts, 1917 Model
2 x Single mounts on centreline, evenly spread
2 raised mounts
8 - 0.31" / 8.0 mm 70.0 cal guns - 0.02lbs / 0.01kg shells, 2,500 per gun
Machine guns in deck mounts, 1917 Model
4 x Twin mounts on sides, evenly spread
Weight of broadside 1,788 lbs / 811 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 426.51 ft / 130.00 m 16.40 ft / 5.00 m
Ends: 1.57" / 40 mm 154.20 ft / 47.00 m 9.84 ft / 3.00 m
Main Belt covers 113 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 1.97" / 50 mm 3.94" / 100 mm
2nd: 1.57" / 40 mm 0.79" / 20 mm -
- Armoured deck - single deck:
For and Aft decks: 1.18" / 30 mm
Forecastle: 0.79" / 20 mm Quarter deck: 0.98" / 25 mm
- Conning towers: Forward 1.97" / 50 mm, Aft 1.97" / 50 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 3 shafts, 79,452 shp / 59,272 Kw = 31.00 kts
Range 7,900nm at 14.00 kts
Bunker at max displacement = 2,000 tons
Complement:
516 - 672
Cost:
£1.628 million / $6.512 million
Distribution of weights at normal displacement:
Armament: 410 tons, 3.9 %
- Guns: 410 tons, 3.9 %
Armour: 1,906 tons, 18.2 %
- Belts: 1,207 tons, 11.5 %
- Armament: 132 tons, 1.3 %
- Armour Deck: 527 tons, 5.0 %
- Conning Towers: 41 tons, 0.4 %
Machinery: 2,912 tons, 27.8 %
Hull, fittings & equipment: 3,607 tons, 34.5 %
Fuel, ammunition & stores: 1,470 tons, 14.0 %
Miscellaneous weights: 161 tons, 1.5 %
- Hull above water: 61 tons
- On freeboard deck: 30 tons
- Above deck: 70 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
10,948 lbs / 4,966 Kg = 61.5 x 7.1 " / 180 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 3.2 ft / 1.0 m
Roll period: 14.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.40
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.540 / 0.549
Length to Beam Ratio: 9.30 : 1
'Natural speed' for length: 24.10 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 68
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 22.15 ft / 6.75 m, 21.33 ft / 6.50 m
- Forward deck: 30.00 %, 21.33 ft / 6.50 m, 16.73 ft / 5.10 m
- Aft deck: 35.00 %, 16.73 ft / 5.10 m, 16.73 ft / 5.10 m
- Quarter deck: 15.00 %, 16.73 ft / 5.10 m, 16.73 ft / 5.10 m
- Average freeboard: 18.41 ft / 5.61 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 106.5 %
- Above water (accommodation/working, high = better): 164.7 %
Waterplane Area: 25,080 Square feet or 2,330 Square metres
Displacement factor (Displacement / loading): 110 %
Structure weight / hull surface area: 101 lbs/sq ft or 493 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.14
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
25t - Long Range Radio
41t - Fire Control (1908)
25t - Night Listening Devices (1904)
60t - Electric T&E for main battery
10t - Additional Damage Control Equipment
Second proposal, with a 130mm secondary battery that is 2 guns lighter, so 3 guns per side instead of 4. Ship is .5kt slower as well.
Atlatl, Aztec Frigate laid down 1917
Displacement:
8,998 t light; 9,376 t standard; 10,505 t normal; 11,407 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(595.15 ft / 591.54 ft) x 62.01 ft x (18.70 / 19.95 ft)
(181.40 m / 180.30 m) x 18.90 m x (5.70 / 6.08 m)
Armament:
8 - 7.09" / 180 mm 50.0 cal guns - 188.38lbs / 85.45kg shells, 140 per gun
Breech loading guns in deck and hoist mounts, 1917 Model
4 x Twin mounts on centreline ends, evenly spread
2 raised mounts - superfiring
6 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
Quick firing guns in deck mounts, 1917 Model
6 x Single mounts on sides, evenly spread
2 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 300 per gun
Anti-air guns in deck mounts, 1917 Model
2 x Single mounts on centreline, evenly spread
2 raised mounts
8 - 0.31" / 8.0 mm 70.0 cal guns - 0.02lbs / 0.01kg shells, 2,500 per gun
Machine guns in deck mounts, 1917 Model
4 x Twin mounts on sides, evenly spread
Weight of broadside 1,955 lbs / 887 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 426.51 ft / 130.00 m 16.40 ft / 5.00 m
Ends: 1.77" / 45 mm 164.04 ft / 50.00 m 16.40 ft / 5.00 m
0.98 ft / 0.30 m Unarmoured ends
Main Belt covers 111 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 1.97" / 50 mm 3.94" / 100 mm
2nd: 1.57" / 40 mm 0.79" / 20 mm -
- Armoured deck - single deck:
For and Aft decks: 1.38" / 35 mm
Forecastle: 0.79" / 20 mm Quarter deck: 1.18" / 30 mm
- Conning towers: Forward 1.97" / 50 mm, Aft 1.97" / 50 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 3 shafts, 73,580 shp / 54,891 Kw = 30.50 kts
Range 8,000nm at 14.00 kts
Bunker at max displacement = 2,031 tons
Complement:
518 - 674
Cost:
£1.589 million / $6.356 million
Distribution of weights at normal displacement:
Armament: 440 tons, 4.2 %
- Guns: 440 tons, 4.2 %
Armour: 2,077 tons, 19.8 %
- Belts: 1,295 tons, 12.3 %
- Armament: 125 tons, 1.2 %
- Armour Deck: 616 tons, 5.9 %
- Conning Towers: 41 tons, 0.4 %
Machinery: 2,697 tons, 25.7 %
Hull, fittings & equipment: 3,601 tons, 34.3 %
Fuel, ammunition & stores: 1,507 tons, 14.3 %
Miscellaneous weights: 183 tons, 1.7 %
- Hull above water: 65 tons
- On freeboard deck: 58 tons
- Above deck: 60 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
12,088 lbs / 5,483 Kg = 67.9 x 7.1 " / 180 mm shells or 1.6 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 3.1 ft / 1.0 m
Roll period: 14.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.43
Seaboat quality (Average = 1.00): 1.03
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.536 / 0.546
Length to Beam Ratio: 9.54 : 1
'Natural speed' for length: 24.32 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 68
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 20.51 ft / 6.25 m, 19.69 ft / 6.00 m
- Forward deck: 30.00 %, 19.69 ft / 6.00 m, 16.40 ft / 5.00 m
- Aft deck: 35.00 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
- Quarter deck: 15.00 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
- Average freeboard: 17.62 ft / 5.37 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 100.4 %
- Above water (accommodation/working, high = better): 159.4 %
Waterplane Area: 25,265 Square feet or 2,347 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 101 lbs/sq ft or 495 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.04
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
18t - 2x3 x 21in Torpedoes on sides
25t - Long Range Radio
45t - Fire Control (1910)
25t - Night Listening Devices (1904)
60t - Electric T&E for main battery
10t - Additional Damage Control Equipment
Proposal 3. Like Proposal 2, but using the twin deck and hoist mounts in development (proposal 2 is using the single deck mounts in development for later DDs) Attains a 4 gun secondary broadside by placing the third twin mount in a superfiring Q position over and slightly ahead of the torpedo tubes (proposals 2 and 3 have torpedoes, proposal 1 really doesn't have space for them and the half-knot of speed has to cost something).
Atlatl, Aztec Frigate laid down 1917
Displacement:
8,998 t light; 9,376 t standard; 10,505 t normal; 11,407 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(595.15 ft / 591.54 ft) x 62.01 ft x (18.70 / 19.95 ft)
(181.40 m / 180.30 m) x 18.90 m x (5.70 / 6.08 m)
Armament:
8 - 7.09" / 180 mm 50.0 cal guns - 188.38lbs / 85.45kg shells, 140 per gun
Breech loading guns in deck and hoist mounts, 1917 Model
4 x Twin mounts on centreline ends, evenly spread
2 raised mounts - superfiring
6 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
Quick firing guns in deck and hoist mounts, 1917 Model
2 x Twin mounts on sides, forward deck aft
1 x Twin mount on centreline, aft deck forward
1 raised mount
2 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 300 per gun
Anti-air guns in deck mounts, 1917 Model
2 x Single mounts on centreline, evenly spread
2 raised mounts
8 - 0.31" / 8.0 mm 70.0 cal guns - 0.02lbs / 0.01kg shells, 2,500 per gun
Machine guns in deck mounts, 1917 Model
4 x Twin mounts on sides, evenly spread
Weight of broadside 1,955 lbs / 887 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 426.51 ft / 130.00 m 16.40 ft / 5.00 m
Ends: 1.57" / 40 mm 164.04 ft / 50.00 m 14.11 ft / 4.30 m
0.98 ft / 0.30 m Unarmoured ends
Main Belt covers 111 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 1.97" / 50 mm 3.94" / 100 mm
2nd: 1.57" / 40 mm 0.79" / 20 mm 1.57" / 40 mm
- Armoured deck - single deck:
For and Aft decks: 1.18" / 30 mm
Forecastle: 0.79" / 20 mm Quarter deck: 1.18" / 30 mm
- Conning towers: Forward 1.97" / 50 mm, Aft 1.97" / 50 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 3 shafts, 73,580 shp / 54,891 Kw = 30.50 kts
Range 8,000nm at 14.00 kts
Bunker at max displacement = 2,031 tons
Complement:
518 - 674
Cost:
£1.630 million / $6.519 million
Distribution of weights at normal displacement:
Armament: 461 tons, 4.4 %
- Guns: 461 tons, 4.4 %
Armour: 1,943 tons, 18.5 %
- Belts: 1,254 tons, 11.9 %
- Armament: 109 tons, 1.0 %
- Armour Deck: 540 tons, 5.1 %
- Conning Towers: 41 tons, 0.4 %
Machinery: 2,697 tons, 25.7 %
Hull, fittings & equipment: 3,714 tons, 35.4 %
Fuel, ammunition & stores: 1,507 tons, 14.3 %
Miscellaneous weights: 183 tons, 1.7 %
- Hull above water: 65 tons
- On freeboard deck: 58 tons
- Above deck: 60 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
11,536 lbs / 5,233 Kg = 64.8 x 7.1 " / 180 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 3.0 ft / 0.9 m
Roll period: 15.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.50
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.536 / 0.546
Length to Beam Ratio: 9.54 : 1
'Natural speed' for length: 24.32 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 68
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 20.51 ft / 6.25 m, 19.69 ft / 6.00 m
- Forward deck: 30.00 %, 19.69 ft / 6.00 m, 16.40 ft / 5.00 m
- Aft deck: 35.00 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
- Quarter deck: 15.00 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
- Average freeboard: 17.62 ft / 5.37 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 102.2 %
- Above water (accommodation/working, high = better): 159.4 %
Waterplane Area: 25,265 Square feet or 2,347 Square metres
Displacement factor (Displacement / loading): 111 %
Structure weight / hull surface area: 104 lbs/sq ft or 508 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.06
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
18t - 2x3 x 21in Torpedoes on sides
25t - Long Range Radio
45t - Fire Control (1910)
25t - Night Listening Devices (1904)
60t - Electric T&E for main battery
10t - Additional Damage Control Equipment
Proposal 4. The only one with Electric Drive. Uses the same arrangement of a pair of side-mounted twin 130s and a superfiring twin 130 to give a secondary broadside of 4 guns. Only this variant has the superfiring gun in the X position as the electric drive needs delete the X 180mm turret. This design technically 'matches' information about a Roman cruiser being put forward in this general class with 6 x 'guns greater than 140mm but not a battlecruiser'. Also given up are the electric motors and gearing (15t per mount) for powered traverse and elevation on the main battery. Something not seen as a problem at ranges exceeding 10km, but could be somewhat problematic at closer ranges where there may be multiple threats or fast-maneuvering threats that could otherwise be serviced with a 180mm gun in a powered mount. Effective gains for the loss of 1 turret and .5m of armor belt are the damage control benefits of turboelectric propulsion, the rapid acceleration and deceleration capabilities, and 900nm of range due to fuel efficiency.
{Oops, didn't copy/paste report. Well, overall this was my least favorite anyway.....so there's that}
The Sultanate has also issued a requirement for a DD-Leader to be laid down in 1918 once the current light cruiser program has been concluded. This is due to lessons learned during the Caicos War, specifically the battles of Grand Turk and Ironclad Bay, where the generally lighter Destroyers of the Sultanate and MTBs were relatively efficient against capital ships when operating in squadrons or wings, but not capable of standing up to the heavier destroyers of the Republic on a one for one basis. At Grand Turk, the presence of two 'scout cruisers' was instrumental in functioning as 'covering fire' for the DDs and MTBs, but the SC-1 class is considered to be wholly unsuited to this role in the post-war assessment due to their relatively weak armament when compared with even modern Roman DDs and their relatively light protective deck armor scheme making them unable to survive hits either, which was well proven.
The requirements are as follows:
Speed sufficient to keep up with destroyer formations
Armament of no fewer than 8 of the new 130/50 guns in development
Protection sufficient to shield armament and vital spaces from destroyer-grade firepower
Acapulco Heavy Industries has put out the following proposal:
SC-6, Aztec Scout Cruiser laid down 1918
Displacement:
5,998 t light; 6,211 t standard; 6,864 t normal; 7,387 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(513.80 ft / 508.53 ft) x 47.90 ft x (19.03 / 20.14 ft)
(156.61 m / 155.00 m) x 14.60 m x (5.80 / 6.14 m)
Armament:
10 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 180 per gun
Quick firing guns in deck and hoist mounts, 1918 Model
4 x Twin mounts on centreline ends, evenly spread
2 raised mounts - superfiring
1 x Twin mount on centreline, forward deck centre
1 double raised mount
2 - 2.76" / 70.0 mm 50.0 cal guns - 11.09lbs / 5.03kg shells, 300 per gun
Anti-air guns in deck mounts, 1918 Model
2 x Single mounts on sides, aft deck forward
2 raised mounts
16 - 0.31" / 8.0 mm 70.0 cal guns - 0.02lbs / 0.01kg shells, 2,500 per gun
Machine guns in deck mounts, 1918 Model
8 x Twin mounts on sides, evenly spread
Weight of broadside 732 lbs / 332 kg
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 1.18" / 30 mm 1.97" / 50 mm
- Box over machinery & magazines:
1.57" / 40 mm
- Conning towers: Forward 1.97" / 50 mm, Aft 1.97" / 50 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 3 shafts, 76,157 shp / 56,813 Kw = 32.50 kts
Range 6,200nm at 14.00 kts
Bunker at max displacement = 1,176 tons
Complement:
376 - 490
Cost:
£1.342 million / $5.369 million
Distribution of weights at normal displacement:
Armament: 184 tons, 2.7 %
- Guns: 184 tons, 2.7 %
Armour: 847 tons, 12.3 %
- Armament: 49 tons, 0.7 %
- Armour Deck: 767 tons, 11.2 %
- Conning Towers: 31 tons, 0.4 %
Machinery: 2,747 tons, 40.0 %
Hull, fittings & equipment: 2,122 tons, 30.9 %
Fuel, ammunition & stores: 866 tons, 12.6 %
Miscellaneous weights: 98 tons, 1.4 %
- Hull above water: 20 tons
- On freeboard deck: 18 tons
- Above deck: 60 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,611 lbs / 1,638 Kg = 53.9 x 5.1 " / 130 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 1.9 ft / 0.6 m
Roll period: 14.5 seconds
Steadiness - As gun platform (Average = 50 %): 67 %
- Recoil effect (Restricted arc if above 1.00): 0.50
Seaboat quality (Average = 1.00): 1.00
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.518 / 0.527
Length to Beam Ratio: 10.62 : 1
'Natural speed' for length: 22.55 kts
Power going to wave formation at top speed: 61 %
Trim (Max stability = 0, Max steadiness = 100): 67
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 19.69 ft / 6.00 m, 18.70 ft / 5.70 m
- Forward deck: 30.00 %, 18.70 ft / 5.70 m, 17.72 ft / 5.40 m
- Aft deck: 35.00 %, 17.72 ft / 5.40 m, 16.40 ft / 5.00 m
- Quarter deck: 15.00 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
- Average freeboard: 17.71 ft / 5.40 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 140.4 %
- Above water (accommodation/working, high = better): 147.1 %
Waterplane Area: 16,505 Square feet or 1,533 Square metres
Displacement factor (Displacement / loading): 96 %
Structure weight / hull surface area: 76 lbs/sq ft or 370 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.86
- Longitudinal: 1.46
- Overall: 0.90
Caution: Hull subject to strain in open-sea
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
25t - LR Radio
25t - Night Listening Devices (1908)
20t - 1908 FC (includes allowance for upgrades)
10t - Additional Damage Control Equipment
18t - 2x3x21in TT on sides
The double-raised mount should be a twin, yes?
Quote from: The Rock Doctor on December 29, 2020, 08:59:29 AM
The double-raised mount should be a twin, yes?
Yes. Typo, that was working on a lot of designs at once.
No worries. I've got a spreadsheet to track my 1916 armored cruiser candidates.
Quote from: The Rock Doctor on December 29, 2020, 09:23:41 AM
No worries. I've got a spreadsheet to track my 1916 armored cruiser candidates.
Yeah, I finally decided on my 1916 cruiser. But the 1917 'Frigate' and 1918 'Corvette' programs are currently in limbo. I have an alternate for the Corvette (scout cruiser) with the same armament but a more traditional armored deck and belt arrangement at a loss of a half-knot of speed.
Take a look at the 'Frigate' proposals farther up, that's for a 'cruising cruiser' rather than a 'scouting and screening vessel/DD leader'. Having precisely 5 cruisers in service and all of them relatively small is painful and has to be rectified. Doubly so when you consider than 2 of them are both slow and severely underarmed for anything other than fighting destroyers or MTBs, and the other three are 'fast enough' and make pretty good commerce raiders (surprisingly effective actually as they weren't designed for it) but they have less firepower than most DESTROYERS half their size.
In a complete departure from its original plans for heavily armed and armored battleships to supplement the Implacable class, the Navy Ministry has been ordered to design a 'light battlecruiser unit'. Budgetary concerns, along with the Sultan's direct concerns about attempting to go 'toe to toe' with the Roman Republic's Navy in battleship building have weighed heavily in this decision to explore other options and directions for the fleet. The Sultan has 'grave concerns' about attempting to catch up to the Roman fleet's current crop of battleships only to be outclassed by those built in response and placed in an Ironclad Bay situation again where Aztec fleet units are too slow, too small, and too few to withstand the larger fleets that Rome can push out of its larger industrial strength.
BC1916, Aztec Battlecruiser laid down 1916
Displacement:
21,093 t light; 21,937 t standard; 24,095 t normal; 25,821 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(733.37 ft / 725.07 ft) x 75.46 ft x (26.57 / 28.11 ft)
(223.53 m / 221.00 m) x 23.00 m x (8.10 / 8.57 m)
Armament:
6 - 11.02" / 280 mm 50.0 cal guns - 709.07lbs / 321.63kg shells, 110 per gun
Breech loading guns in turret on barbette mounts, 1916 Model
3 x Twin mounts on centreline ends, majority forward
1 raised mount - superfiring
12 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
Quick firing guns in deck and hoist mounts, 1916 Model
6 x Twin mounts on sides, evenly spread
4 - 2.76" / 70.0 mm 50.0 cal guns - 11.09lbs / 5.03kg shells, 300 per gun
Anti-air guns in deck mounts, 1916 Model
4 x Single mounts on centreline, evenly spread
4 raised mounts
16 - 0.31" / 8.0 mm 60.0 cal guns - 0.02lbs / 0.01kg shells, 2,000 per gun
Machine guns in deck mounts, 1916 Model
8 x Twin mounts on sides, evenly spread
Weight of broadside 5,151 lbs / 2,336 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.69" / 170 mm 557.74 ft / 170.00 m 16.40 ft / 5.00 m
Ends: 1.97" / 50 mm 164.04 ft / 50.00 m 16.40 ft / 5.00 m
3.28 ft / 1.00 m Unarmoured ends
Main Belt covers 118 % of normal length
- Torpedo Bulkhead - Additional damage containing bulkheads:
1.18" / 30 mm 492.13 ft / 150.00 m 26.25 ft / 8.00 m
Beam between torpedo bulkheads 65.62 ft / 20.00 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.69" / 170 mm 2.76" / 70 mm 6.69" / 170 mm
2nd: 1.97" / 50 mm 0.98" / 25 mm 1.97" / 50 mm
- Armoured deck - single deck:
For and Aft decks: 2.36" / 60 mm
Forecastle: 0.98" / 25 mm Quarter deck: 1.57" / 40 mm
- Conning towers: Forward 3.94" / 100 mm, Aft 3.94" / 100 mm
Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 139,349 shp / 103,954 Kw = 32.00 kts
Range 8,900nm at 14.00 kts
Bunker at max displacement = 3,884 tons
Complement:
966 - 1,257
Cost:
£3.272 million / $13.087 million
Distribution of weights at normal displacement:
Armament: 1,074 tons, 4.5 %
- Guns: 1,074 tons, 4.5 %
Armour: 5,700 tons, 23.7 %
- Belts: 2,659 tons, 11.0 %
- Torpedo bulkhead: 564 tons, 2.3 %
- Armament: 723 tons, 3.0 %
- Armour Deck: 1,611 tons, 6.7 %
- Conning Towers: 142 tons, 0.6 %
Machinery: 5,192 tons, 21.5 %
Hull, fittings & equipment: 7,660 tons, 31.8 %
Fuel, ammunition & stores: 3,002 tons, 12.5 %
Miscellaneous weights: 1,467 tons, 6.1 %
- Hull below water: 1,298 tons
- Hull above water: 70 tons
- Above deck: 99 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
26,647 lbs / 12,087 Kg = 39.8 x 11.0 " / 280 mm shells or 3.2 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 4.6 ft / 1.4 m
Roll period: 14.8 seconds
Steadiness - As gun platform (Average = 50 %): 53 %
- Recoil effect (Restricted arc if above 1.00): 0.50
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.580 / 0.588
Length to Beam Ratio: 9.61 : 1
'Natural speed' for length: 26.93 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 52
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.43 %, 23.62 ft / 7.20 m, 22.97 ft / 7.00 m
- Forward deck: 30.00 %, 22.97 ft / 7.00 m, 19.69 ft / 6.00 m
- Aft deck: 39.14 %, 19.69 ft / 6.00 m, 19.69 ft / 6.00 m
- Quarter deck: 15.43 %, 19.69 ft / 6.00 m, 19.69 ft / 6.00 m
- Average freeboard: 20.72 ft / 6.32 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 111.0 %
- Above water (accommodation/working, high = better): 158.0 %
Waterplane Area: 39,274 Square feet or 3,649 Square metres
Displacement factor (Displacement / loading): 106 %
Structure weight / hull surface area: 136 lbs/sq ft or 662 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.04
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
1298t - Electric Drives
109t - 1908 FC
25t - NF Devices
25t - LR Radio
20t - Additional DC Equipment
The Emergency 1914 GTB-Z program was considered a success. However, concerns were brought up that the 1914 program GTBs focused too heavily on gun firepower and torpedo mounts at the expense of speed. Accepting that 500t GTBs are unlikely to fare well in direct action against 1000t or 1500t screening destroyers, a new speed-focused GTB design is put forth for 1916. Gun Armament has been downgraded to 70mm guns from 100mm guns, giving high rates of fire for fighting other torpedocraft while accepting the reduced capability against destroyers. Torpedo armament is reduced by one, but places two tubes in forward-firing positions to allow for direct-fire of its primary armament against capital ships instead of the turn-broadside fire of the previous class.
TB-X, Aztec Torpedo Boat laid down 1916
Displacement:
500 t light; 515 t standard; 569 t normal; 613 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(289.95 ft / 286.75 ft) x 22.97 ft x (7.38 / 7.75 ft)
(88.38 m / 87.40 m) x 7.00 m x (2.25 / 2.36 m)
Armament:
3 - 2.76" / 70.0 mm 50.0 cal guns - 11.09lbs / 5.03kg shells, 200 per gun
Quick firing guns in deck mounts, 1916 Model
3 x Single mounts on centreline ends, majority forward
1 raised mount - superfiring
8 - 0.31" / 8.0 mm 70.0 cal guns - 0.02lbs / 0.01kg shells, 2,000 per gun
Machine guns in deck mounts, 1916 Model
4 x Twin mounts on sides, evenly spread
Weight of broadside 33 lbs / 15 kg
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 18,982 shp / 14,161 Kw = 32.25 kts
Range 2,950nm at 12.00 kts
Bunker at max displacement = 97 tons
Complement:
57 - 75
Cost:
£0.103 million / $0.413 million
Distribution of weights at normal displacement:
Armament: 7 tons, 1.3 %
- Guns: 7 tons, 1.3 %
Machinery: 311 tons, 54.6 %
Hull, fittings & equipment: 166 tons, 29.1 %
Fuel, ammunition & stores: 69 tons, 12.2 %
Miscellaneous weights: 16 tons, 2.8 %
- On freeboard deck: 15 tons
- Above deck: 1 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
147 lbs / 67 Kg = 14.1 x 2.8 " / 70 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 0.7 ft / 0.2 m
Roll period: 11.6 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.11
Seaboat quality (Average = 1.00): 0.79
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.410 / 0.420
Length to Beam Ratio: 12.49 : 1
'Natural speed' for length: 16.93 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 76
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 11.98 ft / 3.65 m, 11.15 ft / 3.40 m
- Forward deck: 30.00 %, 11.15 ft / 3.40 m, 9.02 ft / 2.75 m
- Aft deck: 35.00 %, 9.02 ft / 2.75 m, 8.37 ft / 2.55 m
- Quarter deck: 15.00 %, 8.37 ft / 2.55 m, 8.37 ft / 2.55 m
- Average freeboard: 9.62 ft / 2.93 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 179.9 %
- Above water (accommodation/working, high = better): 127.3 %
Waterplane Area: 4,078 Square feet or 379 Square metres
Displacement factor (Displacement / loading): 39 %
Structure weight / hull surface area: 22 lbs/sq ft or 108 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.17
- Overall: 0.54
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather
9t 1 x 3 x 533mm TT Centerline behind bridge
6t 2 x 1 x 533mm TT Forward (fixed mount)
1t - 1908 Fire Control
Trials Speed - 35kt
This could certainly be an annoying threat in coastal waters.
Quote from: The Rock Doctor on February 25, 2021, 09:14:58 AM
This could certainly be an annoying threat in coastal waters.
That's pretty much the evolution I'm going for. The first gen GTBs had 100mm guns and were 'stand-in DDs' because of wartime losses. This generation of GTB is aiming to maximize the actual advantages of the GTB over the MTB.
Namely:
-3x range
-FC so that they can launch torpedoes from much further out than the crude arrangements on MTBs
-Seakeeping that can keep them operational in sea states that are beyond those for MTBs (MTBs start having trouble at 3 or 4, these should be good to 5 maybe 6 before they start fighting to keep the ship going)
-FC for the guns, they can sting a DD or pretty generally wreck MTBs in hunter/killer operations
-Oil turbines are quieter than petrol engines for night operations at speed
A view of the Royal Aztec Navy's Capital Ships. From top to bottom: Sultan Ali-Class BC, Implacable Class BB, Caribbean Class BC
A view of the RAN's Destroyers. From top: Scimitar Class, DD-1 Class (all sunk), GTB-Z class, GMB-A mk 2 and GMB-A Classes.
The Sultanate is looking towards new classes of fleet oiler/replenishment ship. The Sojourner class is considered an unqualified success with its combination of speed and capability. However, 8000t fleet oilers require larger docks for construction, which does not match with the needs of the Sultanate's production program. Also, the Sultanate learned a lot from the Caicos War about operating cruisers at sea for extended periods, and a smaller fleet replenishment ship program in greater numbers would be necessary to provide for long-term operations at sea.
First Proposal:
LRO-1, Aztec Fleet Replenishment Oiler laid down 1917
Displacement:
6,067 t light; 6,240 t standard; 7,370 t normal; 8,274 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(410.11 ft / 410.11 ft) x 50.85 ft x (19.03 / 21.01 ft)
(125.00 m / 125.00 m) x 15.50 m x (5.80 / 6.40 m)
Armament:
4 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 150 per gun
Breech loading guns in deck and hoist mounts, 1917 Model
4 x Single mounts on centreline ends, evenly spread
2 raised mounts - superfiring
4 - 2.76" / 70.0 mm 45.0 cal guns - 10.55lbs / 4.79kg shells, 150 per gun
Anti-air guns in deck mounts, 1917 Model
4 x Single mounts on sides, evenly spread
2 raised mounts
Weight of broadside 313 lbs / 142 kg
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 38,854 shp / 28,985 Kw = 26.00 kts
Range 10,000nm at 14.00 kts
Bunker at max displacement = 2,034 tons
Complement:
397 - 517
Cost:
£0.799 million / $3.197 million
Distribution of weights at normal displacement:
Armament: 81 tons, 1.1 %
- Guns: 81 tons, 1.1 %
Armour: 33 tons, 0.4 %
- Armament: 33 tons, 0.4 %
Machinery: 1,424 tons, 19.3 %
Hull, fittings & equipment: 1,913 tons, 26.0 %
Fuel, ammunition & stores: 1,303 tons, 17.7 %
Miscellaneous weights: 2,615 tons, 35.5 %
- Hull below water: 2,000 tons
- Hull above water: 400 tons
- On freeboard deck: 180 tons
- Above deck: 35 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,693 lbs / 3,943 Kg = 129.7 x 5.1 " / 130 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.39
Metacentric height 3.2 ft / 1.0 m
Roll period: 11.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.13
Seaboat quality (Average = 1.00): 1.21
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.650 / 0.661
Length to Beam Ratio: 8.06 : 1
'Natural speed' for length: 20.25 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 35.00 %, 22.97 ft / 7.00 m, 19.69 ft / 6.00 m
- Forward deck: 30.00 %, 19.69 ft / 6.00 m, 16.40 ft / 5.00 m
- Aft deck: 20.00 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
- Quarter deck: 15.00 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
- Average freeboard: 18.50 ft / 5.64 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101.9 %
- Above water (accommodation/working, high = better): 133.3 %
Waterplane Area: 15,976 Square feet or 1,484 Square metres
Displacement factor (Displacement / loading): 128 %
Structure weight / hull surface area: 74 lbs/sq ft or 361 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 2.02
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
5t - 1910 FC
25t - LR Wireless
100t - Cranes
80t - 4 x 10t Landing Barges
2400t - Out-of-port Resupply
And a small replenishment ship that can be made in more significant numbers, as well as utilize smaller docks for construction/repair.
RS-2, Aztec Replenishment Ship laid down 1917
Displacement:
3,019 t light; 3,118 t standard; 3,729 t normal; 4,218 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(393.70 ft / 393.70 ft) x 32.81 ft x (13.12 / 14.68 ft)
(120.00 m / 120.00 m) x 10.00 m x (4.00 / 4.47 m)
Armament:
6 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 200 per gun
Quick firing guns in deck mounts, 1917 Model
3 x Twin mounts on centreline ends, majority forward
1 raised mount - superfiring
2 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 200 per gun
Anti-air guns in deck mounts, 1917 Model
2 x Single mounts on sides, forward deck aft
Weight of broadside 216 lbs / 98 kg
Machinery:
Oil fired boilers, steam turbines,
Electric motors, 2 shafts, 18,393 shp / 13,721 Kw = 24.00 kts
Range 8,000nm at 14.00 kts
Bunker at max displacement = 1,101 tons
Complement:
238 - 310
Cost:
£0.385 million / $1.540 million
Distribution of weights at normal displacement:
Armament: 37 tons, 1.0 %
- Guns: 37 tons, 1.0 %
Machinery: 674 tons, 18.1 %
Hull, fittings & equipment: 944 tons, 25.3 %
Fuel, ammunition & stores: 710 tons, 19.0 %
Miscellaneous weights: 1,364 tons, 36.6 %
- Hull below water: 1,065 tons
- Hull above water: 240 tons
- On freeboard deck: 30 tons
- Above deck: 29 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,386 lbs / 1,989 Kg = 143.7 x 3.9 " / 100 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.30
Metacentric height 1.5 ft / 0.5 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 73 %
- Recoil effect (Restricted arc if above 1.00): 0.17
Seaboat quality (Average = 1.00): 1.30
Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.770 / 0.779
Length to Beam Ratio: 12.00 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 17.22 ft / 5.25 m, 17.22 ft / 5.25 m
- Forward deck: 30.00 %, 17.22 ft / 5.25 m, 17.22 ft / 5.25 m
- Aft deck: 35.00 %, 8.92 ft / 2.72 m, 8.92 ft / 2.72 m
- Quarter deck: 15.00 %, 8.92 ft / 2.72 m, 8.92 ft / 2.72 m
- Average freeboard: 13.07 ft / 3.99 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 100.3 %
- Above water (accommodation/working, high = better): 112.6 %
Waterplane Area: 11,035 Square feet or 1,025 Square metres
Displacement factor (Displacement / loading): 132 %
Structure weight / hull surface area: 51 lbs/sq ft or 251 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.17
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
165t - Electric Drives
4t - 1908 FC
25t - LR Wireless
30t - Cranes and MHE
40t - Repair Facilities
200t - Stores
900t - Fuel
And a slight upgrade of the ship to 4300t
RS-2, Aztec Replenishment Ship laid down 1917
Displacement:
4,389 t light; 4,520 t standard; 5,289 t normal; 5,904 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(429.55 ft / 426.51 ft) x 45.93 ft x (13.12 / 31.97 ft)
(130.93 m / 130.00 m) x 14.00 m x (4.00 / 9.75 m)
Armament:
6 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 200 per gun
Quick firing guns in deck mounts, 1917 Model
3 x Twin mounts on centreline ends, majority forward
1 raised mount - superfiring
2 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 200 per gun
Anti-air guns in deck mounts, 1917 Model
2 x Single mounts on sides, forward deck aft
16 - 0.47" / 12.0 mm 70.0 cal guns - 0.06lbs / 0.03kg shells, 2,500 per gun
Machine guns in deck mounts, 1917 Model
8 x Twin mounts on sides, evenly spread
Weight of broadside 217 lbs / 98 kg
Machinery:
Oil fired boilers, steam turbines,
Electric motors, 2 shafts, 22,851 shp / 17,047 Kw = 24.00 kts
Range 8,000nm at 14.00 kts
Bunker at max displacement = 1,383 tons
Complement:
309 - 403
Cost:
£0.515 million / $2.058 million
Distribution of weights at normal displacement:
Armament: 38 tons, 0.7 %
- Guns: 38 tons, 0.7 %
Machinery: 838 tons, 15.8 %
Hull, fittings & equipment: 1,555 tons, 29.4 %
Fuel, ammunition & stores: 900 tons, 17.0 %
Miscellaneous weights: 1,959 tons, 37.0 %
- Hull below water: 1,510 tons
- Hull above water: 380 tons
- On freeboard deck: 40 tons
- Above deck: 29 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
7,451 lbs / 3,380 Kg = 244.2 x 3.9 " / 100 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.56
Metacentric height 3.3 ft / 1.0 m
Roll period: 10.6 seconds
Steadiness - As gun platform (Average = 50 %): 61 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 1.10
Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.720 / 0.330
Length to Beam Ratio: 9.29 : 1
'Natural speed' for length: 20.65 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 17.22 ft / 5.25 m, 17.22 ft / 5.25 m
- Forward deck: 30.00 %, 17.22 ft / 5.25 m, 17.22 ft / 5.25 m
- Aft deck: 35.00 %, 8.92 ft / 2.72 m, 8.92 ft / 2.72 m
- Quarter deck: 15.00 %, 8.92 ft / 2.72 m, 8.92 ft / 2.72 m
- Average freeboard: 13.07 ft / 3.99 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93.1 %
- Above water (accommodation/working, high = better): 125.7 %
Waterplane Area: 15,983 Square feet or 1,485 Square metres
Displacement factor (Displacement / loading): 141 %
Structure weight / hull surface area: 70 lbs/sq ft or 340 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.14
- Longitudinal: 0.96
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
210t - Electric Drives
4t - 1908 FC
25t - LR Wireless
30t - Cranes and MHE
80t - Repair Facilities
300t - Stores
1300t - Fuel
The hull strengths suggest that you could probably increase it by increasing freeboard. That would give room to stuff more payload into the ship, I imagine.
I'll have to try it
Quote from: The Rock Doctor on March 11, 2021, 08:48:14 AM
The hull strengths suggest that you could probably increase it by increasing freeboard. That would give room to stuff more payload into the ship, I imagine.
Very much correct. Refiguring the freeboard allowed me to increase stowage, or in this case bump the firepower to something that can fend off a destroyer instead of just annoy it.
RS-2, Aztec Replenishment Ship laid down 1917
Displacement:
4,366 t light; 4,520 t standard; 5,289 t normal; 5,904 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(429.40 ft / 426.51 ft) x 45.93 ft x (13.12 / 14.47 ft)
(130.88 m / 130.00 m) x 14.00 m x (4.00 / 4.41 m)
Armament:
5 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
Quick firing guns in deck mounts, 1917 Model
5 x Twin mounts on centreline ends, majority forward
2 raised mounts - superfiring
4 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 300 per gun
Anti-air guns in deck mounts, 1917 Model
2 x Single mounts on sides, aft deck centre
2 x Single mounts on sides, forward deck centre
16 - 0.47" / 12.0 mm 70.0 cal guns - 0.06lbs / 0.03kg shells, 2,500 per gun
Machine guns in deck mounts, 1917 Model
8 x Twin mounts on sides, evenly spread
Weight of broadside 400 lbs / 181 kg
Machinery:
Oil fired boilers, steam turbines,
Electric motors, 2 shafts, 22,851 shp / 17,047 Kw = 24.00 kts
Range 8,000nm at 14.00 kts
Bunker at max displacement = 1,383 tons
Complement:
309 - 403
Cost:
£0.531 million / $2.122 million
Distribution of weights at normal displacement:
Armament: 68 tons, 1.3 %
- Guns: 68 tons, 1.3 %
Machinery: 838 tons, 15.8 %
Hull, fittings & equipment: 1,450 tons, 27.4 %
Fuel, ammunition & stores: 922 tons, 17.4 %
Miscellaneous weights: 2,011 tons, 38.0 %
- Hull below water: 1,510 tons
- Hull above water: 430 tons
- On freeboard deck: 40 tons
- Above deck: 31 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
7,450 lbs / 3,379 Kg = 111.1 x 5.1 " / 130 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.48
Metacentric height 3.0 ft / 0.9 m
Roll period: 11.1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.11
Seaboat quality (Average = 1.00): 1.22
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.720 / 0.729
Length to Beam Ratio: 9.29 : 1
'Natural speed' for length: 20.65 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 16.40 ft / 5.00 m, 15.58 ft / 4.75 m
- Forward deck: 30.00 %, 15.58 ft / 4.75 m, 13.94 ft / 4.25 m
- Aft deck: 35.00 %, 13.94 ft / 4.25 m, 13.94 ft / 4.25 m
- Quarter deck: 15.00 %, 13.94 ft / 4.25 m, 13.94 ft / 4.25 m
- Average freeboard: 14.58 ft / 4.45 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 96.0 %
- Above water (accommodation/working, high = better): 141.1 %
Waterplane Area: 15,983 Square feet or 1,485 Square metres
Displacement factor (Displacement / loading): 136 %
Structure weight / hull surface area: 64 lbs/sq ft or 313 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.01
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
210t - Electric Drives
6t - 1908 FC
25t - LR Wireless
30t - Cranes and MHE
80t - Repair Facilities
350t - Stores
1300t - Fuel
And the same with the 3000t variant. Adjusting freeboard nets me just 20 tons, not enough to be useful as maintenance tonnage.....however it's enough to drop another twin 100mm mount for self defense, giving the little ship enough firepower to hopefully defend itself from a destroyer.
RS-2, Aztec Replenishment Ship laid down 1917
Displacement:
3,012 t light; 3,118 t standard; 3,729 t normal; 4,218 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(393.70 ft / 393.70 ft) x 32.81 ft x (13.12 / 14.68 ft)
(120.00 m / 120.00 m) x 10.00 m x (4.00 / 4.47 m)
Armament:
8 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 200 per gun
Quick firing guns in deck mounts, 1917 Model
4 x Twin mounts on centreline ends, evenly spread
2 raised mounts - superfiring
2 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 200 per gun
Anti-air guns in deck mounts, 1917 Model
2 x Single mounts on sides, forward deck centre
Weight of broadside 281 lbs / 127 kg
Machinery:
Oil fired boilers, steam turbines,
Electric motors, 2 shafts, 18,393 shp / 13,721 Kw = 24.00 kts
Range 8,000nm at 14.00 kts
Bunker at max displacement = 1,101 tons
Complement:
238 - 310
Cost:
£0.391 million / $1.563 million
Distribution of weights at normal displacement:
Armament: 48 tons, 1.3 %
- Guns: 48 tons, 1.3 %
Machinery: 674 tons, 18.1 %
Hull, fittings & equipment: 919 tons, 24.6 %
Fuel, ammunition & stores: 717 tons, 19.2 %
Miscellaneous weights: 1,371 tons, 36.8 %
- Hull below water: 1,065 tons
- Hull above water: 240 tons
- On freeboard deck: 36 tons
- Above deck: 30 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,167 lbs / 1,890 Kg = 136.6 x 3.9 " / 100 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.33
Metacentric height 1.6 ft / 0.5 m
Roll period: 11.1 seconds
Steadiness - As gun platform (Average = 50 %): 64 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 1.14
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.770 / 0.779
Length to Beam Ratio: 12.00 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 14.76 ft / 4.50 m, 13.12 ft / 4.00 m
- Forward deck: 30.00 %, 13.12 ft / 4.00 m, 11.48 ft / 3.50 m
- Aft deck: 46.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
- Quarter deck: 4.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
- Average freeboard: 12.19 ft / 3.72 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101.2 %
- Above water (accommodation/working, high = better): 104.3 %
Waterplane Area: 11,035 Square feet or 1,025 Square metres
Displacement factor (Displacement / loading): 130 %
Structure weight / hull surface area: 53 lbs/sq ft or 256 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.01
- Longitudinal: 0.99
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Adequate accommodation and workspace room
165t - Electric Drives
5t - 1908 FC
25t - LR Wireless
36t - Cranes and MHE
40t - Repair Facilities
200t - Stores
900t - Fuel
RS-2, Aztec Replenishment Ship laid down 1917
Displacement:
3,012 t light; 3,118 t standard; 3,729 t normal; 4,218 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(393.70 ft / 393.70 ft) x 32.81 ft x (13.12 / 14.68 ft)
(120.00 m / 120.00 m) x 10.00 m x (4.00 / 4.47 m)
Armament:
4 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 160 per gun
Quick firing guns in deck mounts, 1917 Model
4 x Single mounts on centreline ends, evenly spread
2 raised mounts - superfiring
3 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 280 per gun
Anti-air guns in deck mounts, 1917 Model
3 x Single mounts on sides, forward evenly spread
1 x Single mount on centreline, forward deck centre
1 raised mount
12 - 0.47" / 12.0 mm 70.0 cal guns - 0.06lbs / 0.03kg shells, 2,500 per gun
Machine guns in deck mounts, 1917 Model
6 x Twin mounts on sides, evenly spread
Weight of broadside 318 lbs / 144 kg
Machinery:
Oil fired boilers, steam turbines,
Electric motors, 2 shafts, 18,393 shp / 13,721 Kw = 24.00 kts
Range 8,000nm at 14.00 kts
Bunker at max displacement = 1,101 tons
Complement:
238 - 310
Cost:
£0.395 million / $1.578 million
Distribution of weights at normal displacement:
Armament: 63 tons, 1.7 %
- Guns: 63 tons, 1.7 %
Machinery: 674 tons, 18.1 %
Hull, fittings & equipment: 908 tons, 24.3 %
Fuel, ammunition & stores: 718 tons, 19.2 %
Miscellaneous weights: 1,367 tons, 36.7 %
- Hull below water: 1,065 tons
- Hull above water: 240 tons
- On freeboard deck: 30 tons
- Above deck: 32 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,121 lbs / 1,869 Kg = 61.5 x 5.1 " / 130 mm shells or 0.8 torpedoes
Stability (Unstable if below 1.00): 1.32
Metacentric height 1.5 ft / 0.5 m
Roll period: 11.1 seconds
Steadiness - As gun platform (Average = 50 %): 64 %
- Recoil effect (Restricted arc if above 1.00): 0.23
Seaboat quality (Average = 1.00): 1.13
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.770 / 0.779
Length to Beam Ratio: 12.00 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 14.76 ft / 4.50 m, 13.12 ft / 4.00 m
- Forward deck: 30.00 %, 13.12 ft / 4.00 m, 11.48 ft / 3.50 m
- Aft deck: 46.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
- Quarter deck: 4.00 %, 11.48 ft / 3.50 m, 11.48 ft / 3.50 m
- Average freeboard: 12.19 ft / 3.72 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101.7 %
- Above water (accommodation/working, high = better): 104.3 %
Waterplane Area: 11,035 Square feet or 1,025 Square metres
Displacement factor (Displacement / loading): 130 %
Structure weight / hull surface area: 53 lbs/sq ft or 257 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 0.99
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Adequate accommodation and workspace room
165t - Electric Drives
7t - 1908 FC
25t - LR Wireless
30t - Cranes and MHE
40t - Repair Facilities
200t - Stores
900t - Fuel
With new technologies for Destroyers getting ready to emerge in the next 2 years, the Sultanate begins forays into expanded 'leader' type destroyers capable of more effective combat against other destroyer-size vessels:
DD-13, Aztec Destroyer laid down 1918
Displacement:
1,498 t light; 1,566 t standard; 1,804 t normal; 1,994 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(391.71 ft / 387.14 ft) x 30.18 ft x (12.57 / 13.47 ft)
(119.39 m / 118.00 m) x 9.20 m x (3.83 / 4.11 m)
Armament:
4 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 150 per gun
Quick firing guns in deck and hoist mounts, 1918 Model
2 x Twin mounts on centreline ends, evenly spread
1 - 5.12" / 130 mm 50.0 cal gun - 70.97lbs / 32.19kg shells, 150 per gun
Quick firing gun in deck mount, 1918 Model
1 x Single mount on centreline, forward deck centre
1 raised mount
1 - 2.76" / 70.0 mm 50.0 cal gun - 11.08lbs / 5.03kg shells, 300 per gun
Anti-air gun in deck mount, 1918 Model
1 x Single mount on centreline, forward deck aft
1 raised mount
8 - 0.47" / 12.0 mm 70.0 cal guns - 0.06lbs / 0.03kg shells, 3,000 per gun
Machine guns in deck mounts, 1918 Model
4 x Twin mounts on sides, evenly spread
Weight of broadside 366 lbs / 166 kg
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.06" / 27 mm 0.79" / 20 mm 1.06" / 27 mm
2nd: 1.06" / 27 mm 0.79" / 20 mm -
- Box over magazines:
1.06" / 27 mm
- Conning towers: Forward 1.06" / 27 mm, Aft 0.00" / 0 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 33,672 shp / 25,119 Kw = 32.20 kts
Range 5,000nm at 14.00 kts
Bunker at max displacement = 428 tons
Complement:
137 - 179
Cost:
£0.429 million / $1.717 million
Distribution of weights at normal displacement:
Armament: 85 tons, 4.7 %
- Guns: 85 tons, 4.7 %
Armour: 35 tons, 1.9 %
- Armament: 18 tons, 1.0 %
- Armour Deck: 14 tons, 0.8 %
- Conning Tower: 3 tons, 0.2 %
Machinery: 911 tons, 50.5 %
Hull, fittings & equipment: 432 tons, 23.9 %
Fuel, ammunition & stores: 306 tons, 17.0 %
Miscellaneous weights: 36 tons, 2.0 %
- Hull below water: 5 tons
- Hull above water: 5 tons
- On freeboard deck: 22 tons
- Above deck: 4 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
376 lbs / 171 Kg = 5.6 x 5.1 " / 130 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 1.0 ft / 0.3 m
Roll period: 12.5 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.80
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.430 / 0.443
Length to Beam Ratio: 12.83 : 1
'Natural speed' for length: 19.68 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 17.06 ft / 5.20 m, 16.40 ft / 5.00 m
- Forward deck: 30.00 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
- Aft deck: 35.00 %, 8.20 ft / 2.50 m, 8.20 ft / 2.50 m
- Quarter deck: 15.00 %, 8.20 ft / 2.50 m, 8.20 ft / 2.50 m
- Average freeboard: 12.36 ft / 3.77 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 181.3 %
- Above water (accommodation/working, high = better): 122.3 %
Waterplane Area: 7,338 Square feet or 682 Square metres
Displacement factor (Displacement / loading): 64 %
Structure weight / hull surface area: 33 lbs/sq ft or 160 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.04
- Overall: 0.54
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
16t - 1x4x 21in TT on Centerline
6t - 60 x ASW Harpoons and Lockers (planned for refit to other ASW weapons at future date)
9t - 1912 FC
5t - Space Set Aside for Hydrophones
QuoteMiscellaneous weights: 36 tons, 2.0 %
- Hull below water: 5 tons
- Hull above water: 5 tons
- On freeboard deck: 22 tons
- Above deck: 4 tons
----------------
16t - 1x4x 21in TT on Centerline
6t - 60 x ASW Harpoons and Lockers (planned for refit to other ASW weapons at future date)
9t - 1912 FC
5t - Space Set Aside for Hydrophones
36t is shortjust 4xTT
& 20t reserved...
IMO, decrease the speed to 32kts & remove 1x130mm gun to have more weight reserve for futur armaments or materials (6xTT, DC, AA guns...)
=> In general, reserve weight will be very useful for weapon modifications and the addition of modern equipment ... later ;)
Well, the superfiring 130 can be removed later if more AA space is needed. Heck the TT could be removed if necessary.
The ASW weight is sufficient for basic asw equipment, which is all that is being planned for this class.
Its meant to be a gunfighter for taking on larger destroyers primarily, not for True general purpose work. Which is why only one quad launcher is carried. Conversely the fast GTB type vessels are carrying triple the torpedoes for their weight.