WesWorld

F.1, Denmark Frigate laid down 1923

Displacement:
1,144 t light; 1,199 t standard; 1,495 t normal; 1,726 t full load
Loading submergence 137 tons/feet

Dimensions:
270.00 ft x 34.00 ft x 15.00 ft (normal load)
82.30 m x 10.36 m x 4.57 m

Armament:
4 - 5.10" / 130 mm guns
6 - 2.24" / 57 mm AA guns
8 - 0.51" / 13 mm guns
Weight of broadside 300 lbs / 136 kg

Armour:
Main gun shields 0.75" / 19 mm, AA gun shields 0.50" / 13 mm, Light gun shields 0.50" / 13 mm
Conning tower 0.50" / 13 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 28,453 shp / 21,226 Kw = 30.00 kts
Range 11,000nm at 12.00 kts

Complement:
120 - 156

Cost:
£0.498 million / $1.992 million

Distribution of weights at normal displacement:
Armament: 37 tons, 2.5 %
Armour: 9 tons, 0.6 %
Belts: 0 tons, 0.0 %, Armament: 7 tons, 0.5 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 1 tons, 0.1 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 712 tons, 47.6 %
Hull, fittings & equipment: 336 tons, 22.5 %
Fuel, ammunition & stores: 351 tons, 23.5 %
Miscellaneous weights: 50 tons, 3.3 %

Metacentric height 1.5

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.26
Shellfire needed to sink: 326 lbs / 148 Kg = 4.9 x 5.1 " / 130 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.3
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.29
Relative quality as seaboat: 1.05

Hull form characteristics:
Block coefficient: 0.380
Sharpness coefficient: 0.31
Hull speed coefficient 'M': 7.22
'Natural speed' for length: 16.43 kts
Power going to wave formation at top speed: 70 %
Trim: 67
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 176.5 %
Relative accommodation and working space: 114.3 %
(Average = 100%)
Displacement factor: 66 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.43
(Structure weight / hull surface area: 32 lbs / square foot or 158 Kg / square metre)
Relative longitudinal hull strength: 2.13
(for 15.00 ft / 4.57 m average freeboard, freeboard adjustment 4.65 ft)
Relative composite hull strength: 0.51

Class designed as anti-submarine convoy escorts
Main armament is laid out as A=2, X=2.
Anti-Aircraft armament (57mm) is laid out as twin mounts, with 13mm machine guns are in 4 X quad mounts.
Specfic Anti-Submarine weaponry as follows-
2 depth charge rails & 8 depth charge launchers - 70depth charges carried

Do I take it that as no-one has said anything, that the ship is essentially ok??

Hi CG,

I´m sorry but for a ship of her size her hs strength will cause real problems:

"Relative cross-sectional hull strength: 0.43
(Structure weight / hull surface area: 32 lbs / square foot or 158 Kg / square metre)
Relative longitudinal hull strength: 2.13
(for 15.00 ft / 4.57 m average freeboard, freeboard adjustment 4.65 ft)
Relative composite hull strength: 0.51"

That´s too low, I think. Cross-sectional hs should be at least 0,5.

Otherwise she´s okay.

Regards,

HoOmAn

Thanks for the comments guys, here is the re-design!!


F.1a, Denmark Frigate(Sub Chaser) laid down 1923

Displacement:
1,143 t light; 1,198 t standard; 1,500 t normal; 1,735 t full load
Loading submergence 127 tons/feet

Dimensions:
270.00 ft x 27.00 ft x 15.00 ft (normal load)
82.30 m x 8.23 m x 4.57 m

Armament:
4 - 5.10" / 130 mm guns
8 - 2.24" / 57 mm AA guns
6 - 0.51" / 13 mm guns
Weight of broadside 311 lbs / 141 kg

Armour:
Main gun shields 0.50" / 13 mm, AA gun shields 0.50" / 13 mm, Light gun shields 0.50" / 13 mm
Conning tower 0.50" / 13 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 29,339 shp / 21,887 Kw = 30.00 kts
Range 11,000nm at 12.00 kts

Complement:
120 - 156

Cost:
£0.505 million / $2.019 million

Distribution of weights at normal displacement:
Armament: 39 tons, 2.6 %
Armour: 7 tons, 0.5 %
Belts: 0 tons, 0.0 %, Armament: 6 tons, 0.4 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 1 tons, 0.1 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 721 tons, 48.0 %
Hull, fittings & equipment: 326 tons, 21.7 %
Fuel, ammunition & stores: 357 tons, 23.8 %
Miscellaneous weights: 50 tons, 3.3 %

Metacentric height 0.9

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.14
Shellfire needed to sink: 312 lbs / 142 Kg = 4.7 x 5.1 " / 130 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.63
Relative quality as seaboat: 1.02

Hull form characteristics:
Block coefficient: 0.480
Sharpness coefficient: 0.32
Hull speed coefficient 'M': 7.21
'Natural speed' for length: 16.43 kts
Power going to wave formation at top speed: 71 %
Trim: 69
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 178.5 %
Relative accommodation and working space: 99.1 %
(Average = 100%)
Displacement factor: 64 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.50
(Structure weight / hull surface area: 33 lbs / square foot or 159 Kg / square metre)
Relative longitudinal hull strength: 1.92
(for 14.00 ft / 4.27 m average freeboard, freeboard adjustment 3.64 ft)
Relative composite hull strength: 0.57

Class designed as anti-submarine convoy escorts
Main armament is laid out as A=2, ,X=2.
Anti-Aircraft armament (57mm) is laid out as twin mounts, with 13mm machine guns are in 4 X twin mounts.
Specfic Anti-Submarine weaponry as follows-
2 depth charge rails & 8 depth charge launchers - 70depth charges carried