Latvian Torpedo Boat laid down 1934
Baltkreivija, Torpeda, Kugis, Mina, Uzvara, Toreila
Displacement:
549 t light; 570 t standard; 634 t normal; 685 t full load
Dimensions: Length overall / water x beam x draught
229.56 ft / 223.75 ft x 21.00 ft x 11.81 ft (normal load)
69.97 m / 68.20 m x 6.40 m x 3.60 m
Armament:
2 - 3.94" / 100 mm guns in single mounts, 37.48lbs / 17.00kg shells, 1934 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
4 - 1.46" / 37.0 mm guns (1x4 guns), 1.55lbs / 0.70kg shells, 1934 Model
Anti-aircraft guns in a deck mount with hoist
on centreline aft, all raised guns - superfiring
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1934 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread
Weight of broadside 87 lbs / 40 kg
Shells per gun, main battery: 150
4 - 21.7" / 550 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.20" / 5 mm -
2nd: 0.98" / 25 mm 0.20" / 5 mm -
3rd: 0.98" / 25 mm 0.20" / 5 mm -
- Conning tower: 0.08" / 2 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 1 shaft, 16,971 shp / 12,660 Kw = 31.00 kts
Range 3,175nm at 14.00 kts
Bunker at max displacement = 115 tons
Complement:
63 - 82
Cost:
£0.346 million / $1.383 million
Distribution of weights at normal displacement:
Armament: 9 tons, 1.4 %
Armour: 5 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 5 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 311 tons, 49.0 %
Hull, fittings & equipment: 215 tons, 33.9 %
Fuel, ammunition & stores: 85 tons, 13.4 %
Miscellaneous weights: 10 tons, 1.6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
182 lbs / 83 Kg = 6.0 x 3.9 " / 100 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 0.6 ft / 0.2 m
Roll period: 11.8 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.49
Seaboat quality (Average = 1.00): 1.07
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 10.66 : 1
'Natural speed' for length: 17.21 kts
Power going to wave formation at top speed: 72 %
Trim (Max stability = 0, Max steadiness = 100): 47
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: 21.65 ft / 6.60 m
- Forecastle (20 %): 13.94 ft / 4.25 m
- Mid (50 %): 10.50 ft / 3.20 m
- Quarterdeck (15 %): 10.50 ft / 3.20 m
- Stern: 11.81 ft / 3.60 m
- Average freeboard: 12.42 ft / 3.79 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 171.3 %
- Above water (accommodation/working, high = better): 38.6 %
Waterplane Area: 3,001 Square feet or 279 Square metres
Displacement factor (Displacement / loading): 60 %
Structure weight / hull surface area: 25 lbs/sq ft or 122 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 6.42
- Overall: 0.64
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is extremely poor
10 tons ASW gear