These are some of the 'concepts' I think I will chase with my little Navy.
First, a small torpedo vessel- reasonably fast, rather inexpensive, and designed to serve in protected waters more so than on the open sea. The torpedo launchers are turreted, re-loadable versions, much like those used by the Japanese in WWII.
QuoteDisplacement:
883 t light; 906 t standard; 1,000 t normal; 1,075 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(275.00 ft / 270.00 ft) x 28.00 ft x (9.50 / 10.03 ft)
(83.82 m / 82.30 m) x 8.53 m x (2.90 / 3.06 m)
Armament:
6 - 1.00" / 25.4 mm 60.0 cal guns - 0.51lbs / 0.23kg shells, 1,500 per gun
Machine guns in deck mounts, 1920 Model
6 x Single mounts on sides, evenly spread
6 raised mounts
Weight of broadside 3 lbs / 1 kg
Main Torpedoes
9 - 18.0" / 458 mm, 16.50 ft / 5.03 m torpedoes - 0.960 t each, 8.636 t total
In 3 sets of deck mounted carriage/fixed tubes
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 17,000 shp / 12,682 Kw = 28.04 kts
Range 2,945nm at 14.00 kts
Bunker at max displacement = 170 tons
Complement:
88 - 115
Cost:
£0.243 million / $0.972 million
Distribution of weights at normal displacement:
Armament: 12 tons, 1.2 %
- Guns: 1 tons, 0.1 %
- Weapons: 11 tons, 1.1 %
Machinery: 510 tons, 51.0 %
Hull, fittings & equipment: 344 tons, 34.4 %
Fuel, ammunition & stores: 117 tons, 11.7 %
Miscellaneous weights: 17 tons, 1.7 %
- Hull above water: 17 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
449 lbs / 204 Kg = 897.3 x 1.0 " / 25 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.25
Metacentric height 1.1 ft / 0.3 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 0.61
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.487 / 0.496
Length to Beam Ratio: 9.64 : 1
'Natural speed' for length: 16.43 kts
Power going to wave formation at top speed: 68 %
Trim (Max stability = 0, Max steadiness = 100): 82
Bow angle (Positive = bow angles forward): 19.65 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 %, 14.00 ft / 4.27 m, 11.00 ft / 3.35 m
- Forward deck: 30.00 %, 11.00 ft / 3.35 m, 8.00 ft / 2.44 m
- Aft deck: 30.00 %, 8.00 ft / 2.44 m, 8.50 ft / 2.59 m
- Quarter deck: 20.00 %, 8.50 ft / 2.59 m, 9.00 ft / 2.74 m
- Average freeboard: 9.52 ft / 2.90 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 167.4 %
- Above water (accommodation/working, high = better): 91.4 %
Waterplane Area: 4,980 Square feet or 463 Square metres
Displacement factor (Displacement / loading): 83 %
Structure weight / hull surface area: 42 lbs/sq ft or 206 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.48
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Adequate accommodation and workspace room
Caution: Lacks seaworthiness - very limited seakeeping ability
Darn forum keeps resizing images; click for full-size:
(http://i142.photobucket.com/albums/r114/Carthaginian/N-verse%204/Navy/MerironclasstorpedocruiserWIP.png)
An interesting concept for a coast defense vessel... fast as a battlecruiser, outfitted with reloadable torpedo tubes on deck to allow it to engage capital ships in cramped quarters, and packing several 12-pounder quick-fire guns to deal with smaller vessels.
The art is a WIP, but it gives a very good idea of my nation's design preferences.
Merrion, Torpedo Cruiser laid down 1920
Displacement:
1,747 t light; 1,805 t standard; 2,000 t normal; 2,156 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(310.00 ft / 300.00 ft) x 35.00 ft x (14.00 / 14.80 ft)
(94.49 m / 91.44 m) x 10.67 m x (4.27 / 4.51 m)
Armament:
6 - 3.00" / 76.2 mm 45.0 cal guns - 12.00lbs / 5.44kg shells, 450 per gun
Quick firing guns in deck mounts, 1920 Model
4 x Single mounts on sides, forward deck aft
4 raised mounts
2 x Single mounts on sides, aft deck centre
2 raised mounts
Weight of broadside 72 lbs / 33 kg
Main Torpedoes
9 - 18.0" / 457 mm, 16.00 ft / 4.88 m torpedoes - 0.815 t each, 7.337 t total
In 3 sets of deck mounted centre rotating tubes
2nd Torpedoes
27 - 18.0" / 457 mm, 16.00 ft / 4.88 m torpedoes - 0.815 t each, 22.012 t total
In 1 sets of deck mounted carriage/fixed tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 25,400 shp / 18,948 Kw = 28.10 kts
Range 4,070nm at 14.00 kts
Bunker at max displacement = 350 tons
Complement:
149 - 194
Cost:
£0.448 million / $1.792 million
Distribution of weights at normal displacement:
Armament: 58 tons, 2.9 %
- Guns: 15 tons, 0.8 %
- Weapons: 42 tons, 2.1 %
Armour: 13 tons, 0.7 %
- Armament: 13 tons, 0.7 %
Machinery: 888 tons, 44.4 %
Hull, fittings & equipment: 694 tons, 34.7 %
Fuel, ammunition & stores: 253 tons, 12.6 %
Miscellaneous weights: 95 tons, 4.8 %
- Hull below water: 20 tons
- Hull above water: 50 tons
- On freeboard deck: 15 tons
- Above deck: 10 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,154 lbs / 523 Kg = 85.5 x 3.0 " / 76 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 1.4 ft / 0.4 m
Roll period: 12.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.09
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): 0.476 / 0.486
Length to Beam Ratio: 8.57 : 1
'Natural speed' for length: 17.32 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 68
Bow angle (Positive = bow angles forward): 22.84 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 19.00 ft / 5.79 m, 16.00 ft / 4.88 m
- Forward deck: 30.00 %, 16.00 ft / 4.88 m, 14.00 ft / 4.27 m
- Aft deck: 30.00 %, 14.00 ft / 4.27 m, 13.00 ft / 3.96 m
- Quarter deck: 20.00 %, 13.00 ft / 3.96 m, 13.00 ft / 3.96 m
- Average freeboard: 14.59 ft / 4.45 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 150.2 %
- Above water (accommodation/working, high = better): 80.6 %
Waterplane Area: 6,848 Square feet or 636 Square metres
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 53 lbs/sq ft or 257 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.87
- Longitudinal: 3.40
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good concept & drawing but,
I think that 3" guns are too light for a cruiser.
Jef
Well, she's only 2000t normal- so she's more like a large destroyer than a real cruiser.
I note too that you have no protection vs Giant bird-bats.
Add some 1" machine guns & protect all your artillery in light close mount.
Giant bird-bats live probably on unexplored islands...
Quote from: Jefgte on February 01, 2012, 03:39:52 PM
I note too that you have no protection vs Giant bird-bats.
Add some 1" machine guns & protect all your artillery in light close mount.
Giant bird-bats live probably on unexplored islands...
They will be added- but I got to find a place for them first!
Things are getting tight on this little girl.
I could probably put a a pair under the open bridge and two pair on the fantail.
I'll just set this down here... nothing to see, move along.
(http://i142.photobucket.com/albums/r114/Carthaginian/N-verse%204/Navy/AntiochclassBBLWIP2.png)
Simple & Effective.
What are the principal characs of this nice BB ?
Jef
She's a light battleship: 8x12", 10x5", 4x3", 10x1". Speed is moderate- 26 knots- and armor protection is as well- 10" main belt; she's faster than a real battleship, but slower than a cruiser. I was thinking about the 2nd-rate dreadnoughts of smaller powers like Spain when I designed her.
Useful to screen a 21kts BBs line & economical for a BC job.
Exellent
Jef
The smallest thing I have ever made work in Springsharp.
Based on a historic Soviet river patrol boat.
Motor Gunboat, laid down 1920
Displacement:
2 t light; 3 t standard; 3 t normal; 3 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(25.00 ft / 25.00 ft) x 5.00 ft x (1.50 / 1.54 ft)
(7.62 m / 7.62 m) x 1.52 m x (0.46 / 0.47 m)
Armament:
1 - 1.00" / 25.4 mm 60.0 cal gun - 0.51lbs / 0.23kg shells, 1,400 per gun
Machine gun in deck mount, 1920 Model
1 x Single mount on centreline, aft deck forward
Weight of broadside 1 lbs / 0 kg
Machinery:
Diesel Internal combustion motors,
Direct drive, 1 shaft, 25 shp / 19 Kw = 10.05 kts
Range 100nm at 10.05 kts
Bunker at max displacement = 0 tons
Complement:
0 - 1
Cost:
£0.001 million / $0.003 million
Distribution of weights at normal displacement:
Armament: 0 tons, 5.5 %
- Guns: 0 tons, 5.5 %
Machinery: 1 tons, 29.6 %
Hull, fittings & equipment: 1 tons, 45.8 %
Fuel, ammunition & stores: 1 tons, 19.1 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3 lbs / 1 Kg = 6.4 x 1.0 " / 25 mm shells or 0.0 torpedoes
Stability (Unstable if below 1.00): 1.09
Metacentric height 0.1 ft / 0.0 m
Roll period: 8.1 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.25
Seaboat quality (Average = 1.00): 0.83
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.550 / 0.553
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 5.00 kts
Power going to wave formation at top speed: 80 %
Trim (Max stability = 0, Max steadiness = 100): 60
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: 25.00 %, 3.50 ft / 1.07 m, 3.25 ft / 0.99 m
- Forward deck: 30.00 %, 3.25 ft / 0.99 m, 3.00 ft / 0.91 m
- Aft deck: 30.00 %, 3.00 ft / 0.91 m, 3.00 ft / 0.91 m
- Quarter deck: 15.00 %, 3.00 ft / 0.91 m, 3.00 ft / 0.91 m
- Average freeboard: 3.13 ft / 0.95 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 129.5 %
- Above water (accommodation/working, high = better): Infinity
Waterplane Area: 85 Square feet or 8 Square metres
Displacement factor (Displacement / loading): 123 %
Structure weight / hull surface area: 6 lbs/sq ft or 31 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.67
- Longitudinal: 34.80
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather
IMO, too small, really too small.
Plesiosaures could take this small craft for lunch...
Jef ;)
Quote from: Carthaginian on February 20, 2012, 05:28:49 PM
The smallest thing I have ever made work in Springsharp.
Complement:
0 - 1
Even with one crew he's going to be very busy...
Quote from: eltf177 on February 21, 2012, 04:23:44 AM
Quote from: Carthaginian on February 20, 2012, 05:28:49 PM
The smallest thing I have ever made work in Springsharp.
Complement:
0 - 1
Even with one crew he's going to be very busy...
eltf177:
Yeah- I think that the boats the Sovs built actually had a crew of 3. You're right that a single crewman would have his hands full if he needed to act under fire; though one man could certainly handle this boat- I've handled a 25-footer alone before, and it's not really that hard... till you have to tie off alone in a swift channel.
Jef
NO DOUBT! That's why she's built to stay in rivers and sheltered waters where anti-wildlife nets would prevent the bigger and badder of the local life forms from ripping her to shreds!
Quote from: Carthaginian on February 21, 2012, 11:32:55 AM
Yeah- I think that the boats the Sovs built actually had a crew of 3. You're right that a single crewman would have his hands full if he needed to act under fire; though one man could certainly handle this boat- I've handled a 25-footer alone before, and it's not really that hard... till you have to tie off alone in a swift channel.
I've no doubt one man could handle it, but not drive the boat and fire the gun at the same time. A gunner is an absolute must.
Something I've been playing with... what is the smallest
EFFECTIVE 18" "treaty battleship" one can design. I basically wanted to hybridize the
Yamato and the
South Dakota, to try and come up with a ship with 18" guns that a nation could produce in effective numbers. I'm aware that she'd probably be less effective than a ship on equal tonnage with equal protection and 8-9 16" guns... but it was fun to try and trim her down!
Maybe next I will play with something in the 20" range (though she'd be a treaty-buster) for similar effect!
QuoteTreaty Study #1, 18" Battleship laid down 1932
Displacement:
33,295 t light; 35,250 t standard; 36,400 t normal; 37,320 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(700.00 ft / 700.00 ft) x 100.00 ft x (28.00 / 28.60 ft)
(213.36 m / 213.36 m) x 30.48 m x (8.53 / 8.72 m)
Armament:
6 - 18.00" / 457 mm 40.0 cal guns - 3,000.01lbs / 1,360.78kg shells, 100 per gun
Breech loading guns in turret on barbette mounts, 1932 Model
3 x Twin mounts on centreline ends, majority forward
1 raised mount - superfiring
12 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 250 per gun
Breech loading guns in turret on barbette mounts, 1932 Model
6 x Twin mounts on sides, evenly spread
8 - 3.00" / 76.2 mm 50.0 cal guns - 14.99lbs / 6.80kg shells, 600 per gun
Anti-air guns in deck mounts, 1932 Model
8 x Single mounts on sides, evenly spread
8 raised mounts
16 - 1.50" / 38.1 mm 60.0 cal guns - 1.50lbs / 0.68kg shells, 1,500 per gun
Breech loading guns in deck mounts, 1932 Model
8 x Twin mounts on sides, evenly spread
8 raised mounts
Weight of broadside 19,344 lbs / 8,774 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.0" / 305 mm 425.00 ft / 129.54 m 16.00 ft / 4.88 m
Ends: Unarmoured
Main Belt covers 93 % of normal length
- Torpedo Bulkhead - Additional damage containing bulkheads:
2.00" / 51 mm 425.00 ft / 129.54 m 36.00 ft / 10.97 m
Beam between torpedo bulkheads 90.00 ft / 27.43 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 14.0" / 356 mm 8.00" / 203 mm 12.0" / 305 mm
2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm
3rd: 0.50" / 13 mm - -
- Armoured deck - multiple decks:
For and Aft decks: 5.00" / 127 mm
- Conning towers: Forward 12.00" / 305 mm, Aft 0.00" / 0 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 100,000 shp / 74,600 Kw = 27.00 kts
Range 6,060nm at 12.00 kts
Bunker at max displacement = 2,070 tons
Complement:
1,316 - 1,712
Cost:
£14.090 million / $56.358 million
Distribution of weights at normal displacement:
Armament: 2,635 tons, 7.2 %
- Guns: 2,635 tons, 7.2 %
Armour: 12,297 tons, 33.8 %
- Belts: 3,584 tons, 9.8 %
- Torpedo bulkhead: 1,132 tons, 3.1 %
- Armament: 3,447 tons, 9.5 %
- Armour Deck: 3,849 tons, 10.6 %
- Conning Tower: 284 tons, 0.8 %
Machinery: 2,952 tons, 8.1 %
Hull, fittings & equipment: 14,962 tons, 41.1 %
Fuel, ammunition & stores: 3,105 tons, 8.5 %
Miscellaneous weights: 450 tons, 1.2 %
- Hull below water: 200 tons
- Hull above water: 200 tons
- On freeboard deck: 50 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
61,688 lbs / 27,981 Kg = 21.2 x 18.0 " / 457 mm shells or 9.7 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 7.0 ft / 2.1 m
Roll period: 15.9 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.87
Seaboat quality (Average = 1.00): 1.24
Hull form characteristics:
Hull has low quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.650 / 0.652
Length to Beam Ratio: 7.00 : 1
'Natural speed' for length: 26.46 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 41
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 %, 32.00 ft / 9.75 m, 27.00 ft / 8.23 m
- Forward deck: 30.00 %, 27.00 ft / 8.23 m, 25.00 ft / 7.62 m
- Aft deck: 30.00 %, 25.00 ft / 7.62 m, 24.00 ft / 7.32 m
- Quarter deck: 20.00 %, 16.00 ft / 4.88 m, 16.00 ft / 4.88 m
- Average freeboard: 24.15 ft / 7.36 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 74.0 %
- Above water (accommodation/working, high = better): 196.0 %
Waterplane Area: 53,624 Square feet or 4,982 Square metres
Displacement factor (Displacement / loading): 110 %
Structure weight / hull surface area: 213 lbs/sq ft or 1,038 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.62
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Good seaboat, rides out heavy weather easily