WesWorld

A more modern escort, optimized for ASW.

Project 1949 Beta, Yugoslav Frigate laid down 1949

Displacement: 1,460 t light; 1,560 t standard; 1,739 t normal; 1,882 t full load

Dimensions: Length overall / water x beam x draught

355.53 ft / 344.49 ft x 39.37 ft x 10.83 ft (normal load) [108.37 m / 105.00 m x 12.00 m x 3.30 m]

Armament:

4 - 4.72" / 120 mm guns (2x2 guns), 52.72lbs / 23.91kg shells, 1949 Model Dual purpose guns in deck mounts with hoists on centerline ends, evenly spread
2 - 2.24" / 57.0 mm guns (1x2 guns), 5.65lbs / 2.56kg shells, 1949 Model Anti-aircraft guns in deck mount on centerline aft, all raised guns - superfiring
4 - 2.24" / 57.0 mm guns (2x2 guns), 5.65lbs / 2.56kg shells, 1949 Model Anti-aircraft guns in deck mounts on side, evenly spread, all raised mounts
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1949 Model Machine guns in deck mounts on side, evenly spread
Weight of broadside 245 lbs / 111 kg
Shells per gun, main battery: 450
6 - 21.7" / 550 mm above water torpedoes

Armor:

Gun armor: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.39" / 10 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm 0.39" / 10 mm -

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 17,157 shp / 12,799 Kw = 28.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 321 tons

Complement: 134 - 175

Cost: £1.030 million / $4.122 million

Distribution of weights at normal displacement:

Armament: 31 tons, 1.8 %
Armor: 14 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 14 tons, 0.8 %
- Armor Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 415 tons, 23.9 %
Hull, fittings & equipment: 901 tons, 51.8 %
Fuel, ammunition & stores: 279 tons, 16.0 %
Miscellaneous weights: 100 tons, 5.8 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 2,916 lbs / 1,323 Kg = 55.3 x 4.7 " / 120 mm shells or 0.8 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.5 ft / 0.4 m
Roll period: 13.6 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.33
Seaboat quality (Average = 1.00): 1.24

Hull form characteristics:

Hull has rise forward of midbreak and transom stern
Block coefficient: 0.415
Length to Beam Ratio: 8.75: 1
'Natural speed' for length: 21.67 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.33 ft / 6.50 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (50 %): 18.04 ft / 5.50 m (11.48 ft / 3.50 m aft of break)
- Quarterdeck (25 %): 11.48 ft / 3.50 m
- Stern: 11.48 ft / 3.50 m
- Average freeboard: 15.47 ft / 4.72 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 100.4 %
- Above water (accommodation/working, high = better): 130.3 %
Waterplane Area: 8,744 Square feet or 812 Square meters
Displacement factor (Displacement / loading): 146 %
Structure weight / hull surface area: 61 lbs/sq ft or 296 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 0.88
- Longitudinal: 3.00
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Breakdown of Miscellaneous Weight

Reserved for air warning radar - 10 tons
Reserved for surface search radar - 10 tons
Reserved for fire control radar - 10 tons
Reserved for AS detection equipment - 20 tons
Reserved for Ahead-Thrown AS Weapon - 20 tons
Reserved for AS outfit including DC and K-guns - 30 tons

Quite a heavy torpedo armament for an ASW escort, though probably quite useful in the constricted waters of the Adriatic.
Are they turntables on centreline or sided or fixed?

Quoted from "Hood"

Quite a heavy torpedo armament for an ASW escort, though probably quite useful in the constricted waters of the Adriatic.
Are they turntables on centreline or sided or fixed?

I envision them as a pair of side mounts, more for launching antisubmarine torpedoes, in the French mode.

That makes sense.
Looks a good design overall.

A small, inshore sort of minesweeper.

Project 1949 Theta, Yugoslav Minesweeper laid down 1949

Displacement: 450 t light; 466 t standard; 524 t normal; 571 t full load

Dimensions: Length overall / water x beam x draught

184.40 ft / 180.45 ft x 29.53 ft x 8.20 ft (normal load) [56.21 m / 55.00 m x 9.00 m x 2.50 m]

Armament:

4 - 2.24" / 57.0 mm guns (2x2 guns), 5.65lbs / 2.56kg shells, 1949 Model Anti-aircraft guns in deck mounts with hoists on centerline ends, evenly spread
4 - 0.79" / 20.0 mm guns (2x2 guns), 0.24lbs / 0.11kg shells, 1949 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts - superfiring
Weight of broadside 24 lbs / 11 kg
Shells per gun, main battery: 400

Armor:

Gun armor: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.59" / 15 mm 0.39" / 10 mm -
2nd: 0.39" / 10 mm 0.39" / 10 mm -

Machinery:

Diesel Internal combustion motors, Geared drive, 2 shafts, 1,393 shp / 1,039 Kw = 16.00 kts
Range 5,000nm at 12.00 kts
Bunker at max displacement = 105 tons

Complement: 54 - 71

Cost: £0.175 million / $0.701 million

Distribution of weights at normal displacement:

Armament: 3 tons, 0.6 %
Armor: 3 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.6 %
- Armor Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 34 tons, 6.4 %
Hull, fittings & equipment: 310 tons, 59.2 %
Fuel, ammunition & stores: 74 tons, 14.1 %
Miscellaneous weights: 100 tons, 19.1 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 1,550 lbs / 703 Kg = 274.3 x 2.2 " / 57 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.0 ft / 0.3 m
Roll period: 12.7 seconds
Steadiness - As gun platform (Average = 50 %): 64 %
- Recoil effect (Restricted arc if above 1.00): 0.07
Seaboat quality (Average = 1.00): 1.57

Hull form characteristics:

Hull has a flush deck
Block coefficient: 0.420
Length to Beam Ratio: 6.11: 1
'Natural speed' for length: 13.43 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 41
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 14.76 ft / 4.50 m
- Forecastle (20 %): 9.42 ft / 2.87 m
- Mid (50 %): 9.42 ft / 2.87 m
- Quarterdeck (25 %): 9.42 ft / 2.87 m
- Stern: 9.42 ft / 2.87 m
- Average freeboard: 9.84 ft / 3.00 m
Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 47.9 %
- Above water (accommodation/working, high = better): 110.3 %
Waterplane Area: 3,321 Square feet or 309 Square meters
Displacement factor (Displacement / loading): 270 %
Structure weight / hull surface area: 60 lbs/sq ft or 292 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 1.44
- Longitudinal: 4.98
- Overall: 1.63
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of miscellaneous weight:

Radar and electronics suite: 15 tons
Degaussing equipment: 10 tons
Paravanes and other minesweeping equipment/gear: 75 tons