A possible German torpedo boat/small destroyer for the Baltic or coastal work (because of it's small size and short range). It's a successor to the preceding T-1 type, but a little bit bigger.
T-13, German Torpedo boat laid down 1937
Displacement:
1,083 t light; 1,138 t standard; 1,238 t normal; 1,318 t full load
Dimensions: Length overall / water x beam x draught
323.74 ft / 311.68 ft x 29.53 ft x 11.48 ft (normal load)
98.68 m / 95.00 m x 9.00 m x 3.50 m
Armament:
6 - 4.13" / 105 mm guns (3x2 guns), 35.32lbs / 16.02kg shells, 1928 Model
Dual purpose guns in deck mounts
on centreline ends, majority forward, 1 raised mount - superfiring
2 - 1.46" / 37.0 mm guns (1x2 guns), 1.55lbs / 0.70kg shells, 1929 Model
Anti-aircraft guns in deck mount
on centreline aft, all raised guns - superfiring
16 - 0.79" / 20.0 mm guns (4x4 guns), 0.24lbs / 0.11kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, 2 raised mounts - superfiring
Weight of broadside 219 lbs / 99 kg
Shells per gun, main battery: 240
6 - 21.0" / 533 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm -
2nd: 0.79" / 20 mm 0.79" / 20 mm -
3rd: 0.39" / 10 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 31,862 shp / 23,769 Kw = 34.00 kts
Range 3,000nm at 15.00 kts
Bunker at max displacement = 180 tons
Complement:
103 - 135
Cost:
£0.797 million / $3.186 million
Distribution of weights at normal displacement:
Armament: 27 tons, 2.2 %
Armour: 17 tons, 1.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 17 tons, 1.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 608 tons, 49.1 %
Hull, fittings & equipment: 401 tons, 32.4 %
Fuel, ammunition & stores: 155 tons, 12.5 %
Miscellaneous weights: 30 tons, 2.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
387 lbs / 176 Kg = 11.0 x 4.1 " / 105 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.35
Metacentric height 1.4 ft / 0.4 m
Roll period: 10.6 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.29
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.410
Length to Beam Ratio: 10.56 : 1
'Natural speed' for length: 20.30 kts
Power going to wave formation at top speed: 70 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.04 ft / 5.50 m
- Forecastle (20 %): 18.04 ft / 5.50 m
- Mid (45 %): 18.04 ft / 5.50 m (11.48 ft / 3.50 m aft of break)
- Quarterdeck (15 %): 11.48 ft / 3.50 m
- Stern: 11.48 ft / 3.50 m
- Average freeboard: 14.44 ft / 4.40 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 179.2 %
- Above water (accommodation/working, high = better): 84.5 %
Waterplane Area: 5,916 Square feet or 550 Square metres
Displacement factor (Displacement / loading): 61 %
Structure weight / hull surface area: 31 lbs/sq ft or 151 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.98
- Overall: 0.59
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
5 tons reserved for depth charges and rails
25 tons reserved for mines and growth