Working on the Plan
slips & docks: 50m-75m-100m-125m-150m-175m-200m
Building start in 1885 & finish in 1889
Jef
Testing a protected gunboat in the new 75m slip.
12 ships in the class
1885: Milan-Epervier-Aigle-Faucon-Vautour-Busard-
1886: Condor-Circaete-Harfang-Harpies-Gypaete-Caracara
Milan, France Canonnière protégée laid down 1885
Displacement:
3 000 t light; 3 122 t standard; 3 587 t normal; 3 959 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(245.00 ft / 240.00 ft) x 44.28 ft (Bulges 49.20 ft) x (18.18 / 19.87 ft)
(74.68 m / 73.15 m) x 13.50 m (Bulges 15.00 m) x (5.54 / 6.06 m)
Armament:
2 - 6.45" / 164 mm 45.0 cal guns - 130.14lbs / 59.03kg shells, 120 per gun
Breech loading guns in turret on barbette mounts, 1885 Model
2 x Single mounts on centreline ends, evenly spread
2 - 6.45" / 164 mm 45.0 cal guns - 130.14lbs / 59.03kg shells, 120 per gun
Breech loading guns in turret on barbette mounts, 1885 Model
2 x Single mounts on sides, forward deck aft
4 - 3.95" / 100 mm 45.0 cal guns - 29.89lbs / 13.56kg shells, 200 per gun
Breech loading guns in deck mounts, 1885 Model
4 x Single mounts on sides, evenly spread
2 - 2.56" / 65.0 mm 45.0 cal guns - 8.14lbs / 3.69kg shells, 250 per gun
Quick firing guns in deck mounts, 1885 Model
2 x Single mounts on sides, forward deck aft
4 - 0.31" / 8.0 mm 76.0 cal guns - 0.02lbs / 0.01kg shells, 2 000 per gun
Machine guns in deck mounts, 1885 Model
4 x Single mounts on sides, forward deck aft
4 raised mounts
Weight of broadside 656 lbs / 298 kg
Main Torpedoes
2 - 14.0" / 356 mm, 12.00 ft / 3.66 m torpedoes - 0.148 t each, 0.296 t total
In 2 sets of deck mounted carriage/fixed tubes
2nd Torpedoes
2 - 14.0" / 356 mm, 12.00 ft / 3.66 m torpedoes - 0.148 t each, 0.296 t total
In 2 sets of deck mounted carriage/fixed tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.77" / 45 mm 227.00 ft / 69.19 m 7.87 ft / 2.40 m
Ends: 0.77" / 20 mm 12.00 ft / 3.66 m 7.86 ft / 2.40 m
1.00 ft / 0.30 m Unarmoured ends
Main Belt covers 146 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.77" / 45 mm 0.77" / 20 mm 1.57" / 40 mm
2nd: 1.77" / 45 mm 0.77" / 20 mm 1.57" / 40 mm
3rd: 0.77" / 20 mm - -
- Armoured deck - multiple decks:
For and Aft decks: 1.57" / 40 mm
Forecastle: 0.77" / 20 mm Quarter deck: 0.77" / 20 mm
- Conning towers: Forward 3.95" / 100 mm, Aft 2.95" / 75 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 7 670 ihp / 5 722 Kw = 17.99 kts
Range 4 500nm at 10.00 kts
Bunker at max displacement = 837 tons (100% coal)
Complement:
231 - 301
Cost:
£0.364 million / $1.455 million
Distribution of weights at normal displacement:
Armament: 171 tons, 4.8 %
- Guns: 170 tons, 4.7 %
- Weapons: 1 tons, 0.0 %
Armour: 423 tons, 11.8 %
- Belts: 130 tons, 3.6 %
- Armament: 61 tons, 1.7 %
- Armour Deck: 198 tons, 5.5 %
- Conning Towers: 35 tons, 1.0 %
Machinery: 1 449 tons, 40.4 %
Hull, fittings & equipment: 927 tons, 25.8 %
Fuel, ammunition & stores: 587 tons, 16.4 %
Miscellaneous weights: 30 tons, 0.8 %
- On freeboard deck: 30 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1 664 lbs / 755 Kg = 13.4 x 6.5 " / 164 mm shells or 5.0 torpedoes
Stability (Unstable if below 1.00): 1.52
Metacentric height 3.0 ft / 0.9 m
Roll period: 11.9 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.19
Seaboat quality (Average = 1.00): 1.04
Hull form characteristics:
Hull has low forecastle, low quarterdeck ,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.585 / 0.590
Length to Beam Ratio: 4.88 : 1
'Natural speed' for length: 15.49 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 68
Bow angle (Positive = bow angles forward): -30.00 degrees
Stern overhang: 1.00 ft / 0.30 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 10.50 ft / 3.20 m, 10.17 ft / 3.10 m
- Forward deck: 30.00 %, 11.82 ft / 3.60 m, 11.82 ft / 3.60 m
- Aft deck: 30.00 %, 11.82 ft / 3.60 m, 11.82 ft / 3.60 m
- Quarter deck: 20.00 %, 10.50 ft / 3.20 m, 10.50 ft / 3.20 m
- Average freeboard: 11.25 ft / 3.43 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 145.1 %
- Above water (accommodation/working, high = better): 74.2 %
Waterplane Area: 7 664 Square feet or 712 Square metres
Displacement factor (Displacement / loading): 90 %
Structure weight / hull surface area: 84 lbs/sq ft or 411 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.89
- Longitudinal: 2.86
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
> Length to Beam Ratio: 4.88 : 1
Kind of short and fat, isn't it?
Quote> Length to Beam Ratio: 4.88 : 1
Kind of short and fat, isn't it?
Fat... yes.
That is the price to carry 4T1x164 on a small 3000t & 75m hull.
Advantage is the reasonable draught.
Better hull
Milan, France Cannonière protégée laid down 1885
1885: Milan-Epervier-Aigle-Faucon-Vautour-Busard-
1886: Condor-Circaete-Harfang-Harpies-Gypaete-Caracara
Displacement:
2 800 t light; 2 917 t standard; 3 360 t normal; 3 714 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(280.50 ft / 275.50 ft) x 32.82 ft (Bulges 39.37 ft) x (18.07 / 19.94 ft)
(85.50 m / 83.97 m) x 10.00 m (Bulges 12.00 m) x (5.51 / 6.08 m)
Armament:
2 - 6.45" / 164 mm 45.0 cal guns - 130.14lbs / 59.03kg shells, 120 per gun
Breech loading guns in turret on barbette mounts, 1885 Model
2 x Single mounts on centreline ends, evenly spread
2 - 6.45" / 164 mm 45.0 cal guns - 130.14lbs / 59.03kg shells, 120 per gun
Breech loading guns in turret on barbette mounts, 1885 Model
2 x Single mounts on sides, forward deck aft
4 - 3.95" / 100 mm 45.0 cal guns - 29.89lbs / 13.56kg shells, 200 per gun
Breech loading guns in deck mounts, 1885 Model
4 x Single mounts on sides, evenly spread
2 - 2.56" / 65.0 mm 45.0 cal guns - 8.14lbs / 3.69kg shells, 250 per gun
Quick firing guns in deck mounts, 1885 Model
2 x Single mounts on sides, forward deck aft
4 - 0.31" / 8.0 mm 76.0 cal guns - 0.02lbs / 0.01kg shells, 2 000 per gun
Machine guns in deck mounts, 1885 Model
4 x Single mounts on sides, forward deck aft
4 raised mounts
Weight of broadside 656 lbs / 298 kg
Main Torpedoes
2 - 14.0" / 356 mm, 12.00 ft / 3.66 m torpedoes - 0.148 t each, 0.296 t total
In 2 sets of deck mounted carriage/fixed tubes
2nd Torpedoes
2 - 14.0" / 356 mm, 12.00 ft / 3.66 m torpedoes - 0.148 t each, 0.296 t total
In 2 sets of deck mounted carriage/fixed tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.77" / 45 mm 249.35 ft / 76.00 m 7.87 ft / 2.40 m
Ends: 0.77" / 20 mm 26.00 ft / 7.92 m 7.87 ft / 2.40 m
Main Belt covers 139 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.77" / 45 mm 0.77" / 20 mm 1.57" / 40 mm
2nd: 1.77" / 45 mm 0.77" / 20 mm 1.57" / 40 mm
3rd: 0.77" / 20 mm - -
- Armoured deck - multiple decks:
For and Aft decks: 1.57" / 40 mm
Forecastle: 0.77" / 20 mm Quarter deck: 0.77" / 20 mm
- Conning towers: Forward 3.95" / 100 mm, Aft 2.95" / 75 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 6 620 ihp / 4 939 Kw = 18.00 kts
Range 4 500nm at 10.00 kts
Bunker at max displacement = 797 tons (100% coal)
Complement:
219 - 286
Cost:
£0.331 million / $1.323 million
Distribution of weights at normal displacement:
Armament: 171 tons, 5.1 %
- Guns: 170 tons, 5.1 %
- Weapons: 1 tons, 0.0 %
Armour: 418 tons, 12.5 %
- Belts: 143 tons, 4.3 %
- Armament: 63 tons, 1.9 %
- Armour Deck: 178 tons, 5.3 %
- Conning Towers: 33 tons, 1.0 %
Machinery: 1 263 tons, 37.6 %
Hull, fittings & equipment: 917 tons, 27.3 %
Fuel, ammunition & stores: 560 tons, 16.7 %
Miscellaneous weights: 30 tons, 0.9 %
- On freeboard deck: 30 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1 657 lbs / 751 Kg = 13.3 x 6.5 " / 164 mm shells or 4.7 torpedoes
Stability (Unstable if below 1.00): 1.35
Metacentric height 1.6 ft / 0.5 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 78 %
- Recoil effect (Restricted arc if above 1.00): 0.51
Seaboat quality (Average = 1.00): 1.56
Hull form characteristics:
Hull has low forecastle, low quarterdeck ,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.600 / 0.601
Length to Beam Ratio: 7.00 : 1
'Natural speed' for length: 16.60 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): -30.00 degrees
Stern overhang: 1.00 ft / 0.30 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.00 %, 11.47 ft / 3.50 m, 10.17 ft / 3.10 m
- Forward deck: 30.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Aft deck: 40.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Quarter deck: 15.00 %, 10.17 ft / 3.10 m, 10.17 ft / 3.10 m
- Average freeboard: 12.31 ft / 3.75 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 137.2 %
- Above water (accommodation/working, high = better): 74.8 %
Waterplane Area: 6 613 Square feet or 614 Square metres
Displacement factor (Displacement / loading): 95 %
Structure weight / hull surface area: 78 lbs/sq ft or 382 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.89
- Longitudinal: 2.68
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
Historically, I don't believe turret on barbette mounts are available in 1885. Am I wrong?
French did not go up turrets on barbette but on reinforced cylindrical axes.
I'll look in my documentation the exact date of this turret design.
However, the cruiser Dupuis de Lome used this type of axis turret in 1888 (T1x194 & T1x164).
Do you think that mounting central axis can be likened to mount barbette? or what kind os SS mount?
Note that was realy a turret with armor, not a rotating closed platform.
Jef
Possible Plan for France
start in 1885
100.000t per year
200 ships in all.
11190t BB are similar to Brennus
Note the high qty of GBs (30) & ATs (46)neccessary for Colonial work.
| Shipyards | 1885 | 1886 | 1887 | 1888 | 1889 | 1890 | 1891 | 1892 |
| 6x175m | | | | | | | | |
| 175 | | | | | | | | |
| 175 | | | | | | | | |
| 175 | | | | | | | | |
| 175 | | | | | | | | |
| 175 | | | | | | | | |
| 8x150m | | | | | | | | |
| 150 | | | | | | | | |
| 150 | | | | | | | | |
| 150 | | | | | | | | |
| 150 | | | | | | | | |
| 150 | | | | | | | | |
| 150 | | | | | | | | |
| 150 | | | | | | | | |
| 10x125m | 11190 | 11190 | 11500 | 12000 | 12000 | | | |
| 125 | 11190 | 11900 | 11500 | 12000 | 12000 | | | |
| 125 | | | | | | | | |
| 125 | 8000 | 7000 | 9000 | 10000 | 10000 | | | |
| 125 | 8000 | 7000 | 9000 | 10000 | 10000 | | | |
| 125 | 8000 | 7000 | | | | | | |
| 125 | 8000 | 7000 | | | | | | |
| 125 | | | | | | | | |
| 125 | | | | | | | | |
| 125 | | | | | | | | |
| 12x100m | 3500 | 3500 | 4000 | 4000 | 4000 | | | |
| 100 | 3500 | 3500 | 4000 | 4000 | 4000 | | | |
| 100 | 3500 | 3500 | 4000 | | | | | |
| 100 | 3500 | 3500 | 4000 | | | | | |
| 100 | 2500 | 2800 | 3500 | 3500 | 4000 | | | |
| 100 | 2500 | 2800 | 3500 | 3500 | 4000 | | | |
| 100 | 2500 | 2800 | 3500 | 3500 | 4000 | | | |
| 100 | 2500 | 2800 | 3500 | 3500 | 4000 | | | |
| 100 | 2500 | 2800 | 3500 | 3500 | 4000 | | | |
| 100 | 2500 | 2800 | 3500 | 3500 | 4000 | | | |
| 100 | 1600 | 1600 | 1600 | 1800 | 1800 | | | |
| 100 | 1600 | 1600 | 1600 | 1800 | 1800 | | | |
| 14x75m | 1600 | 1600 | 1600 | 1800 | 1800 | | | |
| 75 | 1600 | 1600 | 1600 | 1800 | 1800 | | | |
| 75 | 1600 | 1600 | 1600 | 1800 | 1800 | | | |
| 75 | 1600 | 1600 | 1600 | 1800 | 1800 | | | |
| 75 | 1600 | 1600 | 1600 | 1800 | 1800 | | | |
| 75 | 1600 | 1600 | 1600 | 1800 | 1800 | | | |
| 75 | 200 | 300 | 1600 | 1800 | 1800 | | | |
| 75 | 200 | 300 | 1600 | 1800 | 1800 | | | |
| 75 | 200 | 300 | 500 | 500 | 500 | | | |
| 75 | 200 | 300 | 500 | 500 | 500 | | | |
| 75 | 200 | 300 | 500 | 500 | 500 | | | |
| 75 | 200 | 300 | 500 | 500 | 500 | | | |
| 75 | 200 | 300 | 500 | 500 | 500 | | | |
| 75 | 200 | 300 | 500 | 500 | 500 | | | |
| 16x50m | 150 | 225 | 225 | 300 | 300 | | | |
| 50 | 150 | 225 | 225 | 300 | 300 | | | |
| 50 | 150 | 225 | 225 | 300 | 300 | | | |
| 50 | 150 | 225 | 225 | 300 | 300 | | | |
| 50 | 150 | 225 | 225 | 300 | 300 | | | |
| 50 | 150 | 225 | 225 | 300 | 300 | | | |
| 50 | 150 | 225 | 225 | 300 | 300 | | | |
| 50 | 150 | 225 | 225 | 300 | 300 | | | |
| 50 | 150 | 225 | 225 | 300 | | | | |
| 50 | 150 | 225 | 225 | 300 | | | | |
| 50 | 150 | | | | | | | |
| 50 | 150 | | | | | | | |
| 50 | | | | | | | | |
| 50 | | | | | | | | |
| 50 | | | | | | | | |
| 50 | | | | | | | | |
| TOTAL | 99580 | 99340 | 99250 | 97000 | 99400 | | 494570 | |
| | | | | | | | |
| BB | 2 | 2 | 2 | 2 | 2 | | 10 | 11190t to12000t |
| AC | 4 | 4 | 2 | 2 | 2 | | 14 | 7000t to 10000t |
| CP | 4 | 4 | 4 | 2 | 2 | | 16 | 3500t to 4000t |
| GB | 6 | 6 | 6 | 6 | 6 | | 30 | 2500t to 4000t |
| AT | 8 | 8 | 10 | 10 | 10 | | 46 | 1600t to 1800t |
| CT | 8 | 8 | 6 | 6 | 6 | | 34 | 200t to 500t |
| TT | 12 | 10 | 10 | 10 | 8 | | 50 | 150t to 300t |
| TOTAL | 44 | 42 | 40 | 38 | 36 | | 200 | |
| | | | | | | | |
| 1885 | 1886 | 1887 | 1888 | 1889 | | | |
On the subject of turrets, what I've found suggests that the ss# "turret on barbette" mounting really isn't appropriate before about 1895, except in 1 case. That case is the so-called "hooded barbette", which is, essentially, a barbette mounting with a splinter-proof gunshield or cover. These were fairly common during the period, because they offered protection from the elements and from quick-firing guns, but were lighter than the Coles-Ericsson type turrets that preceded them.
So, I'd suggest that if you want to go with a hooded barbette, you can, but the armor thickness on the front and sides of the mounting should be no more than 1"/25.4mm or so.
Quote from: Jefgte on July 04, 2013, 10:20:15 AM
Possible Plan for France
start in 1885
100.000t per year
200 ships in all.
11190t BB are similar to Brennus
Note the high qty of GBs (30) & ATs (46)neccessary for Colonial work.
Hmmmm. In most of the scenarios we've been discussing, France won't start out with many (or in some cases, any) colonies. Given that, it doesn't seem to make sense to me to start out with a bunch of ships optimized for colonial service.
QuoteFrench did not go up turrets on barbette but on reinforced cylindrical axes.
I'll look in my documentation the exact date of this turret design.
However, the cruiser Dupuis de Lome used this type of axis turret in 1888 (T1x194 & T1x164).
Do you think that mounting central axis can be likened to mount barbette? or what kind os SS mount?
Note that was realy a turret with armor, not a rotating closed platform.
Confirmation:
The Armored Cruiser Dupuy de Lome was the first ship built with armored turrets on reinforced axes, no barbettes.
T1x194 => armor 125mm
T1x164 => armor 100mm
LD in july 1888 at Brest
So, before 1888, I SS turrets with 25mm (0.99")
QuoteHmmmm. In most of the scenarios we've been discussing, France won't start out with many (or in some cases, any) colonies. Given that, it doesn't seem to make sense to me to start out with a bunch of ships optimized for colonial service.
It make sense to me to start out with a bunch of ships optimized for colonial service.
:) :D ;D
Note that is a starting plan, modifications "ll come.
Jef
Testing the Brennus class
In the Plan, 2 BB in 1885 & 2 in 1886
Brennus, France Brennus laid down 1885
Displacement:
11 187 t light; 11 738 t standard; 12 411 t normal; 12 949 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(375.65 ft / 375.65 ft) x 67.60 ft x (27.91 / 28.91 ft)
(114.50 m / 114.50 m) x 20.60 m x (8.51 / 8.81 m)
Armament:
2 - 13.40" / 340 mm 42.0 cal guns - 1 122.01lbs / 508.93kg shells, 80 per gun
Breech loading guns in turret on barbette mounts, 1885 Model
2 x Twin mounts on centreline, forward deck forward
1 - 13.40" / 340 mm 42.0 cal gun - 1 122.01lbs / 508.93kg shells, 80 per gun
Breech loading gun in turret on barbette mount, 1885 Model
1 x Single mount on centreline, aft deck aft
6 - 6.45" / 164 mm 45.0 cal guns - 130.14lbs / 59.03kg shells, 200 per gun
Breech loading guns in turret on barbette mounts, 1885 Model
6 x Single mounts on sides, evenly spread
4 - 6.45" / 164 mm 45.0 cal guns - 130.14lbs / 59.03kg shells, 200 per gun
Breech loading guns in casemate mounts, 1885 Model
4 x Single mounts on sides, evenly spread
4 hull mounts in casemates- Limited use in all but light seas
12 - 1.85" / 47.0 mm 45.0 cal guns - 3.07lbs / 1.39kg shells, 400 per gun
Quick firing guns in deck mounts, 1885 Model
12 x Single mounts on sides, evenly spread
12 raised mounts
Weight of broadside 4 704 lbs / 2 134 kg
Main Torpedoes
2 - 15.0" / 381 mm, 15.00 ft / 4.57 m torpedoes - 0.221 t each, 0.442 t total
In 2 sets of deck mounted carriage/fixed tubes
2nd Torpedoes
2 - 15.0" / 381 mm, 15.00 ft / 4.57 m torpedoes - 0.221 t each, 0.442 t total
In 2 sets of deck mounted carriage/fixed tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 15.8" / 400 mm 375.00 ft / 114.30 m 7.86 ft / 2.40 m
Ends: Unarmoured
Upper: 3.95" / 100 mm 375.00 ft / 114.30 m 3.95 ft / 1.20 m
Main Belt covers 154 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.99" / 25 mm 5.90" / 150 mm 15.8" / 400 mm
2nd: 0.99" / 25 mm 5.90" / 150 mm 15.8" / 400 mm
3rd: 0.99" / 25 mm 1.77" / 45 mm 3.90" / 99 mm
4th: 1.77" / 45 mm 1.77" / 45 mm 3.90" / 99 mm
5th: 0.40" / 10 mm - -
- Armoured deck - multiple decks:
For and Aft decks: 2.50" / 64 mm
Forecastle: 1.57" / 40 mm Quarter deck: 1.57" / 40 mm
- Conning towers: Forward 5.90" / 150 mm, Aft 3.95" / 100 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 3 shafts, 13 700 ihp / 10 220 Kw = 18.02 kts
Range 3 000nm at 10.00 kts
Bunker at max displacement = 1 211 tons (100% coal)
Complement:
587 - 764
Cost:
£1.158 million / $4.631 million
Distribution of weights at normal displacement:
Armament: 890 tons, 7.2 %
- Guns: 889 tons, 7.2 %
- Weapons: 1 tons, 0.0 %
Armour: 3 903 tons, 31.5 %
- Belts: 2 001 tons, 16.1 %
- Armament: 987 tons, 8.0 %
- Armour Deck: 801 tons, 6.5 %
- Conning Towers: 114 tons, 0.9 %
Machinery: 2 663 tons, 21.5 %
Hull, fittings & equipment: 3 682 tons, 29.7 %
Fuel, ammunition & stores: 1 224 tons, 9.9 %
Miscellaneous weights: 50 tons, 0.4 %
- On freeboard deck: 50 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
10 170 lbs / 4 613 Kg = 9.1 x 13.4 " / 340 mm shells or 9.3 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 4.0 ft / 1.2 m
Roll period: 14.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.52
Seaboat quality (Average = 1.00): 1.35
Hull form characteristics:
Hull has a flush deck,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.613 / 0.617
Length to Beam Ratio: 5.56 : 1
'Natural speed' for length: 19.38 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 52
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 %, 13.78 ft / 4.20 m, 13.78 ft / 4.20 m
- Forward deck: 20.00 %, 13.78 ft / 4.20 m, 13.78 ft / 4.20 m
- Aft deck: 40.00 %, 13.78 ft / 4.20 m, 13.78 ft / 4.20 m
- Quarter deck: 20.00 %, 13.78 ft / 4.20 m, 13.78 ft / 4.20 m
- Average freeboard: 13.78 ft / 4.20 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 98.9 %
- Above water (accommodation/working, high = better): 83.7 %
Waterplane Area: 18 799 Square feet or 1 747 Square metres
Displacement factor (Displacement / loading): 95 %
Structure weight / hull surface area: 147 lbs/sq ft or 717 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.50
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
There's a couple errors here:
1 - You've got 2 twin 340mm mounts forward, but only 2 guns.
2 - You've got turret on barbette mounts, but the "other gunhouse" armor is too thick for a hooded barbette. From the description here (http://www.cityofart.net/bship/brennus.html#specs), she doesn't really fit any of the SS3 mount options (the barbette's smaller than the "turret on barbette mount", but it's armored unlike the Coles/Ericsson turret, and the turret is well armored unlike a open barbette mount).
Brennus was LD in 1884, stopped in 1885 & restart in 1888 with modified plans.
The first design (1884) was 4x340 in barbettes
The 1888 redesign was with turrets 1T2 x340 + 1T1x340
http://fr.wikipedia.org/wiki/Brennus_(cuirass%C3%A9)
Jef
re SS Brennus
Brennus, France Brennus laid down 1885
Displacement:
11 190 t light; 11 745 t standard; 12 631 t normal; 13 339 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(375.65 ft / 375.65 ft) x 67.60 ft x (28.40 / 29.72 ft)
(114.50 m / 114.50 m) x 20.60 m x (8.66 / 9.06 m)
Armament:
2 - 13.40" / 340 mm 42.0 cal guns - 1 122.02lbs / 508.94kg shells, 80 per gun
Breech loading guns in turret on barbette mount, 1885 Model
1 x Twin mount on centreline, forward deck forward
1 - 13.40" / 340 mm 42.0 cal gun - 1 122.02lbs / 508.94kg shells, 80 per gun
Breech loading gun in turret on barbette mount, 1885 Model
1 x Single mount on centreline, aft deck aft
6 - 6.45" / 164 mm 45.0 cal guns - 130.14lbs / 59.03kg shells, 200 per gun
Breech loading guns in turret on barbette mounts, 1885 Model
6 x Single mounts on sides, evenly spread
4 - 6.45" / 164 mm 45.0 cal guns - 130.14lbs / 59.03kg shells, 200 per gun
Breech loading guns in casemate mounts, 1885 Model
4 x Single mounts on sides, evenly spread
4 hull mounts in casemates- Limited use in all but light seas
12 - 1.85" / 47.0 mm 45.0 cal guns - 3.06lbs / 1.39kg shells, 400 per gun
Quick firing guns in deck mounts, 1885 Model
12 x Single mounts on sides, evenly spread
12 raised mounts
Weight of broadside 4 704 lbs / 2 134 kg
Main Torpedoes
2 - 15.0" / 381 mm, 15.00 ft / 4.57 m torpedoes - 0.221 t each, 0.442 t total
In 2 sets of deck mounted carriage/fixed tubes
2nd Torpedoes
2 - 15.0" / 381 mm, 15.00 ft / 4.57 m torpedoes - 0.221 t each, 0.442 t total
In 2 sets of deck mounted carriage/fixed tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 15.8" / 400 mm 375.00 ft / 114.30 m 7.86 ft / 2.40 m
Ends: Unarmoured
Upper: 3.95" / 100 mm 375.00 ft / 114.30 m 3.95 ft / 1.20 m
Main Belt covers 154 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.90" / 150 mm 0.99" / 25 mm 17.7" / 450 mm
2nd: 5.90" / 150 mm 0.99" / 25 mm 17.7" / 450 mm
3rd: 1.77" / 45 mm 0.99" / 25 mm 3.95" / 100 mm
4th: 1.77" / 45 mm 0.99" / 25 mm 3.95" / 100 mm
5th: 0.40" / 10 mm - -
- Armoured deck - multiple decks:
For and Aft decks: 2.50" / 64 mm
Forecastle: 1.57" / 40 mm Quarter deck: 1.57" / 40 mm
- Conning towers: Forward 5.90" / 150 mm, Aft 3.95" / 100 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 3 shafts, 13 900 ihp / 10 370 Kw = 18.04 kts
Range 4 000nm at 10.00 kts
Bunker at max displacement = 1 594 tons (100% coal)
Complement:
595 - 774
Cost:
£1.163 million / $4.653 million
Distribution of weights at normal displacement:
Armament: 890 tons, 7.0 %
- Guns: 889 tons, 7.0 %
- Weapons: 1 tons, 0.0 %
Armour: 3 731 tons, 29.5 %
- Belts: 2 001 tons, 15.8 %
- Armament: 814 tons, 6.4 %
- Armour Deck: 801 tons, 6.3 %
- Conning Towers: 115 tons, 0.9 %
Machinery: 2 702 tons, 21.4 %
Hull, fittings & equipment: 3 817 tons, 30.2 %
Fuel, ammunition & stores: 1 441 tons, 11.4 %
Miscellaneous weights: 50 tons, 0.4 %
- On freeboard deck: 50 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
10 647 lbs / 4 830 Kg = 9.6 x 13.4 " / 340 mm shells or 9.4 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 4.1 ft / 1.3 m
Roll period: 14.0 seconds
Steadiness - As gun platform (Average = 50 %): 74 %
- Recoil effect (Restricted arc if above 1.00): 0.54
Seaboat quality (Average = 1.00): 1.42
Hull form characteristics:
Hull has a flush deck,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.613 / 0.619
Length to Beam Ratio: 5.56 : 1
'Natural speed' for length: 19.38 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 52
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 %, 14.45 ft / 4.40 m, 14.45 ft / 4.40 m
- Forward deck: 20.00 %, 14.45 ft / 4.40 m, 14.45 ft / 4.40 m
- Aft deck: 40.00 %, 14.45 ft / 4.40 m, 14.45 ft / 4.40 m
- Quarter deck: 20.00 %, 14.45 ft / 4.40 m, 14.45 ft / 4.40 m
- Average freeboard: 14.45 ft / 4.40 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 98.2 %
- Above water (accommodation/working, high = better): 86.6 %
Waterplane Area: 18 799 Square feet or 1 747 Square metres
Displacement factor (Displacement / loading): 98 %
Structure weight / hull surface area: 150 lbs/sq ft or 731 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.89
- Longitudinal: 2.74
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
First TB class in the Plan, this 150t class was in conformity with "La jeune Ecole" but, "Directeur des Travaux" (me) increase the displacement to have a better ship to do the work.
TB1 to TB12, France 140ft-150tonnes laid down 1885
Displacement:
150 t light; 153 t standard; 159 t normal; 163 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(140.00 ft / 140.00 ft) x 15.75 ft x (6.31 / 6.42 ft)
(42.67 m / 42.67 m) x 4.80 m x (1.92 / 1.96 m)
Armament:
2 - 1.46" / 37.0 mm 45.0 cal guns - 1.49lbs / 0.68kg shells, 300 per gun
Quick firing guns in deck mounts, 1885 Model
2 x Single mounts on centreline ends, evenly spread
1 raised mount - superfiring
2 - 0.31" / 8.0 mm 76.0 cal guns - 0.02lbs / 0.01kg shells, 1 000 per gun
Machine guns in deck mounts, 1885 Model
2 x Single mounts on sides, forward deck forward
Weight of broadside 3 lbs / 1 kg
Main Torpedoes
1 - 15.0" / 381 mm, 15.00 ft / 4.57 m torpedo - 0.302 t total
bow tube
2nd Torpedoes
2 - 15.0" / 381 mm, 15.00 ft / 4.57 m torpedoes - 0.302 t each, 0.604 t total
In 2 sets of deck mounted centre rotating tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.20" / 5 mm - -
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 2 400 ihp / 1 791 Kw = 21.31 kts
Range 300nm at 10.00 kts
Bunker at max displacement = 10 tons (100% coal)
Caution: Delicate, lightweight machinery
Complement:
22 - 29
Cost:
£0.019 million / $0.077 million
Distribution of weights at normal displacement:
Armament: 3 tons, 1.7 %
- Guns: 1 tons, 0.6 %
- Weapons: 2 tons, 1.1 %
Armour: 1 tons, 0.6 %
- Armament: 1 tons, 0.6 %
Machinery: 98 tons, 61.5 %
Hull, fittings & equipment: 46 tons, 29.1 %
Fuel, ammunition & stores: 9 tons, 5.8 %
Miscellaneous weights: 2 tons, 1.3 %
- On freeboard deck: 2 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
29 lbs / 13 Kg = 20.2 x 1.5 " / 37 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 0.3 ft / 0.1 m
Roll period: 11.8 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.05
Seaboat quality (Average = 1.00): 1.00
Hull form characteristics:
Hull has raised forecastle,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.400 / 0.404
Length to Beam Ratio: 8.89 : 1
'Natural speed' for length: 11.83 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 72
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 %, 7.87 ft / 2.40 m, 9.35 ft / 2.85 m
- Forward deck: 25.00 %, 7.30 ft / 2.23 m, 6.80 ft / 2.07 m
- Aft deck: 25.00 %, 6.80 ft / 2.07 m, 6.30 ft / 1.92 m
- Quarter deck: 25.00 %, 6.30 ft / 1.92 m, 5.80 ft / 1.77 m
- Average freeboard: 7.10 ft / 2.16 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 200.0 %
- Above water (accommodation/working, high = better): 26.5 %
Waterplane Area: 1 357 Square feet or 126 Square metres
Displacement factor (Displacement / loading): 17 %
Structure weight / hull surface area: 16 lbs/sq ft or 80 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.70
- Overall: 0.59
Caution: Hull subject to strain in open-sea
Extremely poor machinery, storage, compartmentation space
Extremely poor accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
BB1 to BB4 - type A
Austerlitz-Arcole-Auerstaedt-Alma, France A laid down 1885
Displacement:
10 920 t light; 11 452 t standard; 12 651 t normal; 13 611 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(375.65 ft / 375.65 ft) x 63.98 ft (Bulges 70.55 ft) x (26.69 / 28.55 ft)
(114.50 m / 114.50 m) x 19.50 m (Bulges 21.50 m) x (8.14 / 8.70 m)
Armament:
2 - 13.40" / 340 mm 28.0 cal guns - 1 060.01lbs / 480.81kg shells, 80 per gun
Breech loading guns in turret on barbette mount, 1885 Model
2 x Single mounts on centreline ends, evenly spread
2 - 10.78" / 274 mm 28.0 cal guns - 551.11lbs / 249.98kg shells, 100 per gun
Breech loading guns in turret on barbette mounts, 1885 Model
2 x Single mounts on sides, forward deck aft
8 - 6.45" / 164 mm 45.0 cal guns - 130.14lbs / 59.03kg shells, 200 per gun
Breech loading guns in casemate mounts, 1885 Model
8 x Single mounts on sides, evenly spread
12 - 1.85" / 47.0 mm 45.0 cal guns - 3.06lbs / 1.39kg shells, 400 per gun
Quick firing guns in deck mounts, 1885 Model
12 x Single mounts on sides, evenly spread
12 raised mounts
Weight of broadside 4 300 lbs / 1 951 kg
Main Torpedoes
2 - 15.0" / 381 mm, 15.00 ft / 4.57 m torpedoes - 0.221 t each, 0.442 t total
In 2 sets of deck mounted carriage/fixed tubes
2nd Torpedoes
2 - 15.0" / 381 mm, 15.00 ft / 4.57 m torpedoes - 0.221 t each, 0.442 t total
In 2 sets of deck mounted carriage/fixed tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 15.8" / 400 mm 375.00 ft / 114.30 m 7.86 ft / 2.40 m
Ends: Unarmoured
Upper: 3.95" / 100 mm 375.00 ft / 114.30 m 3.95 ft / 1.20 m
Main Belt covers 154 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.90" / 150 mm 0.99" / 25 mm 17.7" / 450 mm
2nd: 5.90" / 150 mm 0.99" / 25 mm 17.7" / 450 mm
3rd: 1.77" / 45 mm 0.99" / 25 mm 3.95" / 100 mm
5th: 0.40" / 10 mm - -
- Armoured deck - multiple decks:
For and Aft decks: 2.50" / 64 mm
Forecastle: 1.57" / 40 mm Quarter deck: 1.57" / 40 mm
- Conning towers: Forward 5.90" / 150 mm, Aft 3.95" / 100 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 3 shafts, 14 070 ihp / 10 496 Kw = 18.04 kts
Range 5 500nm at 10.00 kts
Bunker at max displacement = 2 158 tons (100% coal)
Complement:
596 - 775
Cost:
£1.003 million / $4.013 million
Distribution of weights at normal displacement:
Armament: 545 tons, 4.3 %
- Guns: 544 tons, 4.3 %
- Weapons: 1 tons, 0.0 %
Armour: 3 744 tons, 29.6 %
- Belts: 2 001 tons, 15.8 %
- Armament: 860 tons, 6.8 %
- Armour Deck: 768 tons, 6.1 %
- Conning Towers: 115 tons, 0.9 %
Machinery: 2 735 tons, 21.6 %
Hull, fittings & equipment: 3 832 tons, 30.3 %
Fuel, ammunition & stores: 1 731 tons, 13.7 %
Miscellaneous weights: 64 tons, 0.5 %
- On freeboard deck: 64 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
12 495 lbs / 5 668 Kg = 11.2 x 13.4 " / 340 mm shells or 11.1 torpedoes
Stability (Unstable if below 1.00): 1.35
Metacentric height 4.3 ft / 1.3 m
Roll period: 14.2 seconds
Steadiness - As gun platform (Average = 50 %): 82 %
- Recoil effect (Restricted arc if above 1.00): 0.45
Seaboat quality (Average = 1.00): 1.57
Hull form characteristics:
Hull has a flush deck,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.626 / 0.629
Length to Beam Ratio: 5.32 : 1
'Natural speed' for length: 19.38 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 52
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 %, 15.75 ft / 4.80 m, 15.75 ft / 4.80 m
- Forward deck: 20.00 %, 15.75 ft / 4.80 m, 15.75 ft / 4.80 m
- Aft deck: 40.00 %, 15.75 ft / 4.80 m, 15.75 ft / 4.80 m
- Quarter deck: 20.00 %, 15.75 ft / 4.80 m, 15.75 ft / 4.80 m
- Average freeboard: 15.75 ft / 4.80 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): 90.3 %
Waterplane Area: 18 009 Square feet or 1 673 Square metres
Displacement factor (Displacement / loading): 110 %
Structure weight / hull surface area: 144 lbs/sq ft or 705 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.89
- Longitudinal: 2.67
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
Layout's very French, with the lozenge arrangement of the heavy guns. The 164mm guns are not going to have very good arcs, though, with the side turret interfering with them, you might want to think about moving them down a deck. Anti-TB armament is small in bore, but that's totally appropriate for the period (historically, in the Sino-French War that took place while these ships would be being laid down, the French Navy was using spar torpedoes to attack Chinese ships at Fuzhou and Shipu).
The new "Directeur des Travaux" in place since jan. 1885 had not finalised the armament of the class.