France 1904-1905 projects

The Rock Doctor · January 21, 2016, 06:00:45 PM

Pretty low freeboard; gonna be tough to do stuff in bad weather of any kind.

Jefgte · January 22, 2016, 07:56:40 PM

PB, TB, Aviso...
200t, 250t, 333t, 375t, 500t...

I have not made the choice for 1904H1...

:( ??? :P :-[ :-\

Logi · January 22, 2016, 09:26:10 PM

I feel like 333t is the best design: Building three of them rounds nicely to 1 BP used, they have longer range than the smaller variants which makes it much more flexible, and they aren't as expensive to build/maintain as the 500t design which is built to DD/TB standards.

Jefgte · January 23, 2016, 07:38:42 PM

Last calculation give:

4x500t TB
2x250t SS
14x250t for coastal patrols (Dunkerque- Brest-Toulon)

with 3BP & 3.73$

Jefgte · January 26, 2016, 03:41:05 AM

After much calculations (SS)
PB & TB 200t-250t-291t-333t-375t-500t

I retain Logi suggestion
333t is the best choice.
This class is a kind of "La Lance" aviso torpilleur.

Jef ;)

Jefgte · January 31, 2016, 04:11:35 PM

Some countries built strong destroyers with 100mm or bigger guns.
4 TB5 class are in the 1904 plan.
France update the TB5 to TB5-2
3x75 => 3x100
4x47 => remove
misc weight: 16t => 14t

TB109 to TB112, France TB5-2 laid down 1902 (Engine 1900)

Displacement:
   500 t light; 518 t standard; 586 t normal; 641 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (229.66 ft / 229.66 ft) x 25.52 ft x (8.75 / 9.28 ft)
   (70.00 m / 70.00 m) x 7.78 m x (2.67 / 2.83 m)

Armament:
3 - 3.94" / 100.0 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 120 per gun
     Quick firing guns in deck mounts, 1902 Model
     3 x Single mounts on centreline, evenly spread
2 - 0.31" / 8.0 mm 76.0 cal guns - 0.02lbs / 0.01kg shells, 2 000 per gun
     Machine guns in deck mounts, 1902 Model
     2 x Single mounts on sides, forward deck centre
Weight of broadside 92 lbs / 42 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.39" / 10 mm     -           -

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 8 000 ihp / 5 968 Kw = 25.16 kts
   Range 2 800nm at 10.00 kts
   Bunker at max displacement = 123 tons (90% coal)
     Caution: Delicate, lightweight machinery

Complement:
   59 - 77

Cost:
   £0.070 million / $0.279 million

Distribution of weights at normal displacement:
   Armament: 17 tons, 2.8 %
     - Guns: 17 tons, 2.8 %
   Armour: 3 tons, 0.5 %
     - Armament: 3 tons, 0.5 %
   Machinery: 341 tons, 58.2 %
   Hull, fittings & equipment: 126 tons, 21.4 %
   Fuel, ammunition & stores: 86 tons, 14.7 %
   Miscellaneous weights: 14 tons, 2.4 %
     - On freeboard deck: 14 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     136 lbs / 62 Kg = 4.5 x 3.9 " / 100 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.50
   Metacentric height 1.3 ft / 0.4 m
   Roll period: 9.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.15
   Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.400 / 0.412
   Length to Beam Ratio: 9.00 : 1
   'Natural speed' for length: 15.15 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   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 %, 12.47 ft / 3.80 m, 10.66 ft / 3.25 m
     - Forward deck:   30.00 %, 10.66 ft / 3.25 m, 9.19 ft / 2.80 m
     - Aft deck:   30.00 %, 9.19 ft / 2.80 m, 8.20 ft / 2.50 m
     - Quarter deck:   20.00 %, 8.20 ft / 2.50 m, 7.87 ft / 2.40 m
     - Average freeboard:      9.47 ft / 2.89 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 195.2 %
      - Above water (accommodation/working, high = better): 108.4 %
   Waterplane Area: 3 608 Square feet or 335 Square metres
   Displacement factor (Displacement / loading): 23 %
   Structure weight / hull surface area: 22 lbs/sq ft or 105 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.36
      - Overall: 0.55
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

2.4 tons for 4 torpedoes + 2.4t for 4 reloads
8 mines
Trial speed: 28kts
Bonus: 2.85

Jefgte · February 25, 2016, 05:33:36 PM

Testing a kind of Contre-Torpilleur

CP1905, France scout cruiser laid down 1906 (Engine 1905)

Displacement:
   2 769 t light; 2 875 t standard; 3 272 t normal; 3 590 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (393.70 ft / 393.70 ft) x 39.37 ft x (14.78 / 15.85 ft)
   (120.00 m / 120.00 m) x 12.00 m x (4.50 / 4.83 m)

Armament:
4 - 5.51" / 140 mm 45.0 cal guns - 84.44lbs / 38.30kg shells, 180 per gun
     Breech loading guns in deck and hoist mounts, 1906 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
4 - 2.95" / 75.0 mm 45.0 cal guns - 12.98lbs / 5.89kg shells, 220 per gun
     Breech loading guns in deck mounts, 1906 Model
     4 x Single mounts on sides, evenly spread
4 - 0.31" / 8.0 mm 45.0 cal guns - 0.02lbs / 0.01kg shells, 2 000 per gun
     Breech loading guns in deck mounts, 1906 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
Weight of broadside 390 lbs / 177 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.39" / 10 mm     -           -
   4th:   0.39" / 10 mm     -           -
   5th:   0.39" / 10 mm     -           -

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 20 000 shp / 14 920 Kw = 25.50 kts
   Range 5 000nm at 10.00 kts
   Bunker at max displacement = 715 tons (90% coal)

Complement:
   216 - 281

Cost:
   £0.353 million / $1.412 million

Distribution of weights at normal displacement:
   Armament: 99 tons, 3.0 %
     - Guns: 99 tons, 3.0 %
   Armour: 21 tons, 0.6 %
     - Armament: 21 tons, 0.6 %
   Machinery: 1 582 tons, 48.3 %
   Hull, fittings & equipment: 1 021 tons, 31.2 %
   Fuel, ammunition & stores: 503 tons, 15.4 %
   Miscellaneous weights: 47 tons, 1.4 %
     - On freeboard deck: 22 tons
     - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1 383 lbs / 627 Kg = 16.5 x 5.5 " / 140 mm shells or 0.4 torpedoes
   Stability (Unstable if below 1.00): 1.28
   Metacentric height 1.9 ft / 0.6 m
   Roll period: 11.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 75 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality (Average = 1.00): 1.09

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.511
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   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 %, 15.09 ft / 4.60 m, 12.47 ft / 3.80 m
     - Forward deck:   32.00 %, 12.47 ft / 3.80 m, 11.81 ft / 3.60 m
     - Aft deck:   33.00 %, 11.81 ft / 3.60 m, 11.81 ft / 3.60 m
     - Quarter deck:   15.00 %, 11.81 ft / 3.60 m, 11.81 ft / 3.60 m
     - Average freeboard:      12.26 ft / 3.74 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 166.3 %
      - Above water (accommodation/working, high = better): 109.0 %
   Waterplane Area: 10 327 Square feet or 959 Square metres
   Displacement factor (Displacement / loading): 88 %
   Structure weight / hull surface area: 64 lbs/sq ft or 314 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.23
      - Overall: 1.00
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

eltf177 · February 26, 2016, 03:57:19 AM

Very nice, if protection is a bit on the thin side. ::)

I'm guessing miscellaneous weight includes a wireless set and torpedo tubes?

Jefgte · February 28, 2016, 04:34:25 PM

CP6 class, France Scout Cruiser laid down 1906 (Engine 1905)

Displacement:
   3 680 t light; 3 815 t standard; 4 471 t normal; 4 996 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (393.70 ft / 393.70 ft) x 43.73 ft x (17.65 / 19.23 ft)
   (120.00 m / 120.00 m) x 13.33 m x (5.38 / 5.86 m)

Armament:
4 - 5.51" / 140 mm 45.0 cal guns - 84.44lbs / 38.30kg shells, 160 per gun
     Breech loading guns in deck and hoist mounts, 1906 Model
     4 x Single mounts on centreline ends, evenly spread
      1 raised mount - superfiring
4 - 3.94" / 100.0 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 230 per gun
     Breech loading guns in deck and hoist mounts, 1906 Model
     4 x Single mounts on sides, forward deck aft
4 - 0.31" / 8.0 mm 76.0 cal guns - 0.02lbs / 0.01kg shells, 4 000 per gun
     Breech loading guns in deck mounts, 1906 Model
     4 x Single mounts on side ends, evenly spread
Weight of broadside 461 lbs / 209 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.97" / 50 mm   331.36 ft / 101.00 m   8.01 ft / 2.44 m
   Ends:   Unarmoured
     Main Belt covers 129 % of normal length

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.18" / 30 mm     -         1.57" / 40 mm
   2nd:   1.18" / 30 mm     -         1.57" / 40 mm
   3rd:   0.39" / 10 mm     -           -

- Armoured deck - single deck:
   For and Aft decks: 1.97" / 50 mm

- Conning towers: Forward 1.97" / 50 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 20 000 shp / 14 920 Kw = 24.18 kts
   Range 7 000nm at 10.00 kts
   Bunker at max displacement = 1 180 tons (90% coal)

Complement:
   273 - 355

Cost:
   £0.404 million / $1.615 million

Distribution of weights at normal displacement:
   Armament: 125 tons, 2.8 %
     - Guns: 125 tons, 2.8 %
   Armour: 605 tons, 13.5 %
     - Belts: 207 tons, 4.6 %
     - Armament: 38 tons, 0.9 %
     - Armour Deck: 348 tons, 7.8 %
     - Conning Tower: 12 tons, 0.3 %
   Machinery: 1 650 tons, 36.9 %
   Hull, fittings & equipment: 1 232 tons, 27.5 %
   Fuel, ammunition & stores: 791 tons, 17.7 %
   Miscellaneous weights: 69 tons, 1.5 %
     - On freeboard deck: 44 tons
     - Above deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2 905 lbs / 1 318 Kg = 34.7 x 5.5 " / 140 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.25
   Metacentric height 2.2 ft / 0.7 m
   Roll period: 12.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 79 %
         - Recoil effect (Restricted arc if above 1.00): 0.28
   Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.515 / 0.528
   Length to Beam Ratio: 9.00 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   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 %, 18.37 ft / 5.60 m, 15.09 ft / 4.60 m
     - Forward deck:   35.00 %, 15.09 ft / 4.60 m, 11.81 ft / 3.60 m
     - Aft deck:   30.00 %, 11.81 ft / 3.60 m, 11.81 ft / 3.60 m
     - Quarter deck:   15.00 %, 11.81 ft / 3.60 m, 11.81 ft / 3.60 m
     - Average freeboard:      13.30 ft / 4.06 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 129.0 %
      - Above water (accommodation/working, high = better): 103.0 %
   Waterplane Area: 11 631 Square feet or 1 081 Square metres
   Displacement factor (Displacement / loading): 102 %
   Structure weight / hull surface area: 68 lbs/sq ft or 333 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.45
      - Overall: 1.00
   Cramped 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

Misc weight:
25t - short wireless
4t - torpedoes
40t - mines
---
armor 605t
machinery 1650t

Jefgte · June 30, 2016, 05:01:10 PM

Following the battle of Gran Manan and damages caused by torpedoes on the battleships line.
"Ministère de la Guerre" ask to add torpedoes protection to the new 17650t battleships LD in 1905,
a 25mm bulkhead protection is add in the hull.

République & Démocratie, France BB6 class laid down 1905 (Engine 1902)

Displacement:
   17 650 t light; 18 636 t standard; 20 155 t normal; 21 370 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (551.18 ft / 551.18 ft) x 72.18 ft (Bulges 78.74 ft) x (25.96 / 27.39 ft)
   (168.00 m / 168.00 m) x 22.00 m (Bulges 24.00 m) x (7.91 / 8.35 m)

Armament:
4 - 12.01" / 305 mm 45.0 cal guns - 873.08lbs / 396.02kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1905 Model
     2 x Twin mounts on centreline ends, evenly spread
4 - 12.01" / 305 mm 45.0 cal guns - 873.08lbs / 396.02kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1905 Model
     2 x Twin mounts on sides amidships
12 - 5.51" / 140 mm 45.0 cal guns - 84.44lbs / 38.30kg shells, 200 per gun
     Breech loading guns in casemate mounts, 1905 Model
     12 x Single mounts on side ends, evenly spread
16 - 3.94" / 100.0 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 300 per gun
     Quick firing guns in casemate mounts, 1905 Model
     16 x Single mounts on side ends, evenly spread
      16 raised mounts
8 - 0.31" / 8.0 mm 76.0 cal guns - 0.02lbs / 0.01kg shells, 3 000 per gun
     Machine guns in deck mounts, 1905 Model
     8 x Single mounts on side ends, evenly spread
Weight of broadside 8 490 lbs / 3 851 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   10.6" / 270 mm   364.17 ft / 111.00 m   9.84 ft / 3.00 m
   Ends:   4.72" / 120 mm   164.04 ft / 50.00 m   7.87 ft / 2.40 m
     22.97 ft / 7.00 m Unarmoured ends
   Upper:   5.91" / 150 mm   364.17 ft / 111.00 m   9.84 ft / 3.00 m
     Main Belt covers 102 % of normal length

- Torpedo Bulkhead - Strengthened structural bulkheads:
      0.98" / 25 mm   364.17 ft / 111.00 m   26.25 ft / 8.00 m
   Beam between torpedo bulkheads 72.18 ft / 22.00 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   3.94" / 100 mm      10.6" / 270 mm
   2nd:   11.8" / 300 mm   3.94" / 100 mm      10.6" / 270 mm
   3rd:   2.76" / 70 mm   2.76" / 70 mm      2.76" / 70 mm
   4th:   0.98" / 25 mm     -         0.98" / 25 mm

- Armoured deck - single deck:
   For and Aft decks: 2.76" / 70 mm
   Forecastle: 1.57" / 40 mm Quarter deck: 1.57" / 40 mm

- Conning towers: Forward 10.63" / 270 mm, Aft 7.09" / 180 mm

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 4 shafts, 28 000 ihp / 20 888 Kw = 21.03 kts
   Range 7 500nm at 10.00 kts
   Bunker at max displacement = 2 734 tons (90% coal)

Complement:
   845 - 1 099

Cost:
   £1.930 million / $7.719 million

Distribution of weights at normal displacement:
   Armament: 1 482 tons, 7.4 %
     - Guns: 1 482 tons, 7.4 %
   Armour: 6 084 tons, 30.2 %
     - Belts: 2 746 tons, 13.6 %
     - Torpedo bulkhead: 348 tons, 1.7 %
     - Armament: 1 327 tons, 6.6 %
     - Armour Deck: 1 381 tons, 6.9 %
     - Conning Towers: 283 tons, 1.4 %
   Machinery: 4 200 tons, 20.8 %
   Hull, fittings & equipment: 5 583 tons, 27.7 %
   Fuel, ammunition & stores: 2 505 tons, 12.4 %
   Miscellaneous weights: 300 tons, 1.5 %
     - Hull below water: 25 tons
     - Hull above water: 25 tons
     - Above deck: 250 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     18 387 lbs / 8 340 Kg = 21.2 x 12.0 " / 305 mm shells or 2.6 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 4.6 ft / 1.4 m
   Roll period: 15.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 73 %
         - Recoil effect (Restricted arc if above 1.00): 0.56
   Seaboat quality (Average = 1.00): 1.45

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.626 / 0.629
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 23.48 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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 %, 24.93 ft / 7.60 m, 21.00 ft / 6.40 m
     - Forward deck:   20.00 %, 21.00 ft / 6.40 m, 21.00 ft / 6.40 m
     - Aft deck:   40.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
     - Quarter deck:   20.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
     - Average freeboard:      16.59 ft / 5.06 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.1 %
      - Above water (accommodation/working, high = better): 105.8 %
   Waterplane Area: 29 810 Square feet or 2 769 Square metres
   Displacement factor (Displacement / loading): 93 %
   Structure weight / hull surface area: 147 lbs/sq ft or 719 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.34
      - 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

25t for extra pumps installation

snip · June 30, 2016, 05:39:56 PM

Any form of TDS requires the 1905 BB/AC Architecture tech.

Tanthalas · June 30, 2016, 05:41:55 PM

HA that was what I was about to post... although my post was much more involved and (shockingly) diplomatic.

Quote from: snip on June 30, 2016, 05:39:56 PM
Any form of TDS requires the 1905 BB/AC Architecture tech.

Logi · June 30, 2016, 06:10:46 PM

Quote1905 (Engine 1902)

This is also quite strange. There is no tech that gives engine year 1902, only 1900 or 1905.

Jefgte · July 03, 2016, 04:34:31 PM

République & Démocratie, France BB6 class laid down 1905

Displacement:
   17 700 t light; 18 686 t standard; 20 143 t normal; 21 309 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (551.18 ft / 551.18 ft) x 72.18 ft (Bulges 78.74 ft) x (25.34 / 26.69 ft)
   (168.00 m / 168.00 m) x 22.00 m (Bulges 24.00 m) x (7.72 / 8.14 m)

Armament:
8 - 12.01" / 305 mm 45.0 cal guns - 873.07lbs / 396.02kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1905 Model
     4 x Twin mounts on centreline ends, evenly spread
      1 raised mount fore - superfiring
12 - 5.51" / 140 mm 45.0 cal guns - 84.44lbs / 38.30kg shells, 200 per gun
     Breech loading guns in casemate mounts, 1905 Model
     12 x Single mounts on sides, evenly spread
16 - 3.94" / 100.0 mm 45.0 cal guns - 30.78lbs / 13.96kg shells, 300 per gun
     Quick firing guns in casemate mounts, 1905 Model
     16 x Single mounts on side ends, evenly spread
      16 raised mounts
8 - 0.31" / 8.0 mm 76.0 cal guns - 0.02lbs / 0.01kg shells, 3 000 per gun
     Machine guns in deck mounts, 1905 Model
     8 x Single mounts on side ends, evenly spread
Weight of broadside 8 490 lbs / 3 851 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   10.6" / 270 mm   357.61 ft / 109.00 m   9.84 ft / 3.00 m
   Ends:   4.72" / 120 mm   183.73 ft / 56.00 m   7.87 ft / 2.40 m
     9.84 ft / 3.00 m Unarmoured ends
   Upper:   5.91" / 150 mm   357.61 ft / 109.00 m   9.84 ft / 3.00 m
     Main Belt covers 100 % of normal length

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   3.94" / 100 mm      10.6" / 270 mm
   3rd:   2.76" / 70 mm   2.76" / 70 mm      2.76" / 70 mm
   4th:   0.98" / 25 mm     -         0.98" / 25 mm

- Armoured deck - single deck:
   For and Aft decks: 2.76" / 70 mm
   Forecastle: 1.57" / 40 mm Quarter deck: 1.57" / 40 mm

- Conning towers: Forward 10.63" / 270 mm, Aft 7.09" / 180 mm

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 4 shafts, 28 000 ihp / 20 888 Kw = 21.00 kts
   Range 7 500nm at 10.00 kts
   Bunker at max displacement = 2 623 tons (90% coal)

Complement:
   845 - 1 099

Cost:
   £1.906 million / $7.624 million

Distribution of weights at normal displacement:
   Armament: 1 482 tons, 7.4 %
     - Guns: 1 482 tons, 7.4 %
   Armour: 5 893 tons, 29.3 %
     - Belts: 2 744 tons, 13.6 %
     - Armament: 1 466 tons, 7.3 %
     - Armour Deck: 1 400 tons, 6.9 %
     - Conning Towers: 283 tons, 1.4 %
   Machinery: 4 018 tons, 19.9 %
   Hull, fittings & equipment: 6 007 tons, 29.8 %
   Fuel, ammunition & stores: 2 443 tons, 12.1 %
   Miscellaneous weights: 300 tons, 1.5 %
     - Hull below water: 25 tons
     - Hull above water: 25 tons
     - Above deck: 250 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     19 309 lbs / 8 758 Kg = 22.3 x 12.0 " / 305 mm shells or 2.1 torpedoes
   Stability (Unstable if below 1.00): 1.18
   Metacentric height 4.2 ft / 1.3 m
   Roll period: 16.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 75 %
         - Recoil effect (Restricted arc if above 1.00): 0.73
   Seaboat quality (Average = 1.00): 1.50

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.641 / 0.644
   Length to Beam Ratio: 7.00 : 1
   'Natural speed' for length: 23.48 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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 %, 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:   30.00 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
     - Quarter deck:   20.00 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
     - Average freeboard:      17.81 ft / 5.43 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 98.3 %
      - Above water (accommodation/working, high = better): 117.4 %
   Waterplane Area: 30 225 Square feet or 2 808 Square metres
   Displacement factor (Displacement / loading): 95 %
   Structure weight / hull surface area: 146 lbs/sq ft or 715 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.34
      - 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

25t for extra pumps installation

Jefgte · July 07, 2016, 05:04:25 PM

An additionnal 280t gunboat class made to protect colonies
She use the same engines as the 333t Patrol boat nearly finish
Note the short draught for coastal & estuaries operations

P13-P24, France Patrouilleur 280t laid down 1905

Displacement:
   280 t light; 292 t standard; 316 t normal; 335 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (144.36 ft / 144.36 ft) x 21.06 ft x (5.91 / 6.20 ft)
   (44.00 m / 44.00 m) x 6.42 m x (1.80 / 1.89 m)

Armament:
2 - 2.95" / 75.0 mm 45.0 cal guns - 12.98lbs / 5.89kg shells, 400 per gun
     Quick firing guns in deck mounts, 1905 Model
     2 x Single mounts on centreline ends, evenly spread
8 - 0.31" / 8.0 mm 76.0 cal guns - 0.02lbs / 0.01kg shells, 4 000 per gun
     Machine guns in deck mounts, 1905 Model
     8 x Single mounts on side ends, evenly spread
Weight of broadside 26 lbs / 12 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.24" / 6 mm     -           -
   3rd:   0.24" / 6 mm     -           -

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 930 ihp / 694 Kw = 14.98 kts
   Range 1 400nm at 10.00 kts
   Bunker at max displacement = 43 tons (90% coal)

Complement:
   36 - 48

Cost:
   £0.029 million / $0.115 million

Distribution of weights at normal displacement:
   Armament: 5 tons, 1.7 %
     - Guns: 5 tons, 1.7 %
   Armour: 6 tons, 2.0 %
     - Armament: 6 tons, 2.0 %
   Machinery: 124 tons, 39.4 %
   Hull, fittings & equipment: 89 tons, 28.0 %
   Fuel, ammunition & stores: 36 tons, 11.5 %
   Miscellaneous weights: 55 tons, 17.4 %
     - On freeboard deck: 55 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     234 lbs / 106 Kg = 18.2 x 3.0 " / 75 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.24
   Metacentric height 0.7 ft / 0.2 m
   Roll period: 10.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.08
   Seaboat quality (Average = 1.00): 1.12

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.616 / 0.622
   Length to Beam Ratio: 6.85 : 1
   'Natural speed' for length: 12.01 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 64
   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 %, 9.19 ft / 2.80 m, 7.22 ft / 2.20 m
     - Forward deck:   25.00 %, 7.22 ft / 2.20 m, 6.56 ft / 2.00 m
     - Aft deck:   25.00 %, 6.56 ft / 2.00 m, 6.56 ft / 2.00 m
     - Quarter deck:   25.00 %, 6.56 ft / 2.00 m, 5.91 ft / 1.80 m
     - Average freeboard:      6.92 ft / 2.11 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 133.6 %
      - Above water (accommodation/working, high = better): 80.0 %
   Waterplane Area: 2 257 Square feet or 210 Square metres
   Displacement factor (Displacement / loading): 92 %
   Structure weight / hull surface area: 27 lbs/sq ft or 133 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.96
      - Overall: 1.00
   Cramped machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Misc weight 55t:
10t for short wireless
2T for 2 TTx450
43t reserved
for minelayer
troop
material
additional coal for long cruise