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Commonwealth of Recherche
http://67.205.157.234/forums/viewtopic.php?f=14&t=2289		 Page 29 of 56
Author:  Rowdy36 [ August 20th, 2014, 12:16 pm ]
Post subject:  Re: Commonwealth of Recherche
Thanks :)
Author:  eltf177 [ August 20th, 2014, 11:40 pm ]
Post subject:  Re: Commonwealth of Recherche
Well, here she is with 3.5-inch deck armor...

*****

Ypres, Recherche Heavy Cruiser laid down 1940

Displacement:
14,090 t light; 14,665 t standard; 16,016 t normal; 17,097 t full load

Dimensions: Length overall / water x beam x draught
666.92 ft / 656.00 ft x 70.50 ft x 23.00 ft (normal load)
203.28 m / 199.95 m x 21.49 m x 7.01 m

Armament:
9 - 8.00" / 203 mm guns (3x3 guns), 256.00lbs / 116.12kg shells, 1940 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 4.50" / 114 mm guns (4x2 guns), 45.56lbs / 20.67kg shells, 1940 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 2 raised mounts - superfiring
4 - 4.50" / 114 mm guns (2x2 guns), 45.56lbs / 20.67kg shells, 1940 Model
Dual purpose guns in deck mounts with hoists
on centreline, all aft, all raised mounts - superfiring
22 - 1.57" / 40.0 mm guns (13 mounts), 1.95lbs / 0.88kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 18 raised mounts
20 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 12 raised mounts
Weight of broadside 2,898 lbs / 1,315 kg
Shells per gun, main battery: 150
8 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.00" / 127 mm 410.00 ft / 124.97 m 10.00 ft / 3.05 m
Ends: Unarmoured
Upper: 2.00" / 51 mm 250.00 ft / 76.20 m 6.00 ft / 1.83 m
Main Belt covers 96 % of normal length

- Torpedo Bulkhead:
2.00" / 51 mm 410.00 ft / 124.97 m 20.00 ft / 6.10 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.00" / 127 mm 2.00" / 51 mm 3.00" / 76 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
3rd: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
4th: 1.00" / 25 mm - -
5th: 0.80" / 20 mm - -

- Armour deck: 3.50" / 89 mm, Conning tower: 4.00" / 102 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 85,153 shp / 63,524 Kw = 31.00 kts
Range 6,000nm at 18.00 kts
Bunker at max displacement = 2,432 tons

Complement:
711 - 925

Cost:
£6.698 million / $26.791 million

Distribution of weights at normal displacement:
Armament: 362 tons, 2.3 %
Armour: 4,271 tons, 26.7 %
- Belts: 1,005 tons, 6.3 %
- Torpedo bulkhead: 607 tons, 3.8 %
- Armament: 476 tons, 3.0 %
- Armour Deck: 2,128 tons, 13.3 %
- Conning Tower: 55 tons, 0.3 %
Machinery: 2,277 tons, 14.2 %
Hull, fittings & equipment: 7,031 tons, 43.9 %
Fuel, ammunition & stores: 1,926 tons, 12.0 %
Miscellaneous weights: 150 tons, 0.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
36,832 lbs / 16,707 Kg = 143.9 x 8.0 " / 203 mm shells or 5.3 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 4.2 ft / 1.3 m
Roll period: 14.4 seconds
Steadiness - As gun platform (Average = 50 %): 59 %
- Recoil effect (Restricted arc if above 1.00): 0.59
Seaboat quality (Average = 1.00): 1.95

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.527
Length to Beam Ratio: 9.30 : 1
'Natural speed' for length: 29.30 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 30
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.00 ft / 9.14 m
- Forecastle (20 %): 30.00 ft / 9.14 m
- Mid (50 %): 40.00 ft / 12.19 m (25.00 ft / 7.62 m aft of break)
- Quarterdeck (15 %): 25.00 ft / 7.62 m
- Stern: 25.00 ft / 7.62 m
- Average freeboard: 29.00 ft / 8.84 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91.6 %
- Above water (accommodation/working, high = better): 229.7 %
Waterplane Area: 32,871 Square feet or 3,054 Square metres
Displacement factor (Displacement / loading): 135 %
Structure weight / hull surface area: 121 lbs/sq ft or 592 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.68
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

The 40mm cannons are in 3 quad (all raised) and 10 single (6 raised) mounts. TT's in quad beam mounts. Ship has no aviation facilities.

Displacement rose substantially but design works quite well.
Author:  Rowdy36 [ August 21st, 2014, 4:57 am ]
Post subject:  Re: Commonwealth of Recherche
Thanks for that Eltf :) I'm not sure if using a different version of Springsharp makes a difference but here's my attempt:

Ypres Class, Recherche Heavy Cruiser laid down 1939

Displacement:
11,688 t light; 12,358 t standard; 13,718 t normal; 14,805 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(657.41 ft / 647.50 ft) x 70.54 ft x (21.72 / 22.94 ft)
(200.38 m / 197.36 m) x 21.50 m x (6.62 / 6.99 m)

Armament:
9 - 8.00" / 203 mm 50.0 cal guns - 271.01lbs / 122.93kg shells, 180 per gun
Breech loading guns in turret on barbette mounts, 1939 Model
3 x Triple mounts on centreline ends, majority forward
1 raised mount - superfiring
12 - 4.50" / 114 mm 45.0 cal guns - 45.95lbs / 20.84kg shells, 350 per gun
Dual purpose guns in deck and hoist mounts, 1939 Model
4 x Twin mounts on sides, evenly spread
2 raised mounts
2 x Twin mounts on centreline, aft evenly spread
2 raised mounts
12 - 1.57" / 40.0 mm 45.0 cal guns - 1.97lbs / 0.89kg shells, 1,500 per gun
Anti-air guns in deck mounts, 1939 Model
2 x 2 row quad mounts on sides, forward deck centre
2 raised mounts
1 x 2 row quad mount on centreline, aft deck centre
1 raised mount
10 - 1.57" / 40.0 mm 56.3 cal guns - 2.12lbs / 0.96kg shells, 1,500 per gun
Anti-air guns in deck mounts, 1939 Model
8 x Single mounts on sides, forward evenly spread
6 raised mounts
2 x Single mounts on centreline, aft deck aft
20 - 0.79" / 20.0 mm 70.0 cal guns - 0.27lbs / 0.12kg shells, 2,500 per gun
Breech loading guns in deck mounts, 1939 Model
18 x Single mounts on sides, evenly spread
10 raised mounts
2 x Single mounts on centreline, evenly spread
2 raised mounts
Weight of broadside 3,041 lbs / 1,379 kg
Main Torpedoes
8 - 21.0" / 533 mm, 5.40 ft / 1.65 m torpedoes - 0.515 t each, 4.123 t total
In 2 sets of deck mounted side rotating tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.00" / 127 mm 458.00 ft / 139.60 m 10.00 ft / 3.05 m
Ends: Unarmoured
Upper: 2.00" / 51 mm 200.00 ft / 60.96 m 7.00 ft / 2.13 m
Main Belt covers 109 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
2.00" / 51 mm 458.00 ft / 139.60 m 18.00 ft / 5.49 m
Beam between torpedo bulkheads 61.00 ft / 18.59 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.00" / 127 mm 2.00" / 51 mm 3.00" / 76 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm -

- Armoured deck - multiple decks:
For and Aft decks: 3.50" / 89 mm

- Conning towers: Forward 4.00" / 102 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 76,284 shp / 56,908 Kw = 31.00 kts
Range 6,000nm at 18.00 kts
Bunker at max displacement = 2,447 tons

Complement:
633 - 823

Cost:
£5.872 million / $23.489 million

Distribution of weights at normal displacement:
Armament: 759 tons, 5.5 %
- Guns: 751 tons, 5.5 %
- Weapons: 8 tons, 0.1 %
Armour: 3,716 tons, 27.1 %
- Belts: 1,072 tons, 7.8 %
- Torpedo bulkhead: 610 tons, 4.4 %
- Armament: 328 tons, 2.4 %
- Armour Deck: 1,657 tons, 12.1 %
- Conning Tower: 49 tons, 0.4 %
Machinery: 2,064 tons, 15.0 %
Hull, fittings & equipment: 5,059 tons, 36.9 %
Fuel, ammunition & stores: 2,030 tons, 14.8 %
Miscellaneous weights: 90 tons, 0.7 %
- On freeboard deck: 60 tons
- Above deck: 30 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
22,244 lbs / 10,090 Kg = 86.9 x 8.0 " / 203 mm shells or 9.8 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 3.8 ft / 1.1 m
Roll period: 15.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.48
Seaboat quality (Average = 1.00): 1.17

Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.484 / 0.495
Length to Beam Ratio: 9.18 : 1
'Natural speed' for length: 29.29 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 60
Bow angle (Positive = bow angles forward): 15.00 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 %, 29.53 ft / 9.00 m, 24.61 ft / 7.50 m
- Forward deck: 30.00 %, 24.61 ft / 7.50 m, 23.95 ft / 7.30 m
- Aft deck: 35.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Quarter deck: 15.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Average freeboard: 19.16 ft / 5.84 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 82.8 %
- Above water (accommodation/working, high = better): 170.9 %
Waterplane Area: 31,182 Square feet or 2,897 Square metres
Displacement factor (Displacement / loading): 126 %
Structure weight / hull surface area: 119 lbs/sq ft or 583 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.21
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Author:  BCRenown [ August 21st, 2014, 11:31 am ]
Post subject:  Re: Commonwealth of Recherche
Hey Rowdy. Very nice work on Ypres. She's a beauty. 8-)
Author:  Rowdy36 [ August 21st, 2014, 4:13 pm ]
Post subject:  Re: Commonwealth of Recherche
Thanks BCRenown :)

I'm going through and finishing drawings that have been 80-90% complete for ages, and the first cab off the ranks is the Castletown class destroyer:

[ img ]

[ img ]
Author:  JSB [ August 21st, 2014, 4:30 pm ]
Post subject:  Re: Commonwealth of Recherche
Very nice destroyer (and I like the colours), my only observation is do you need 2 types of 40mm ?

JSB
Author:  KHT [ August 21st, 2014, 4:32 pm ]
Post subject:  Re: Commonwealth of Recherche
A very interesting design. I can't help but to worry at the lack of main artillery aft, being unable to fire those guns in all directions seems to be a potential weakness. It does make her look slightly bow-heavy.
Author:  Blackbuck [ August 21st, 2014, 4:42 pm ]
Post subject:  Re: Commonwealth of Recherche
If it were me I'd swap the B mount aft and revise the AAA layout so you can broadside with the Hazemeyers.
Author:  BCRenown [ August 21st, 2014, 4:50 pm ]
Post subject:  Re: Commonwealth of Recherche
The "Battles' lack of astern fire never sat well with me. Several years ago I drew a design with a third 4.5" turret at the expense of the aft bank of torpedo tubes. For your scrutiny:

[ img ]

[ img ]
Author:  Hood [ August 21st, 2014, 7:52 pm ]
Post subject:  Re: Commonwealth of Recherche
I think it looks great.

In an aircraft-dominated theatre of war, more AA firepower makes more sense. How many destroyers ever used all three mounts in action at once in a surface action?
The pom-pom, Bofors mix is odd, but the pom-pom was favoured as an anti-MTB weapon.
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