WesWorld

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

Do you have a sketch of her, some kind of drawing? I wondered if you can place 4 2cm-Vierlinge on her with good arcs?

Heh, I rarely do drawings, that's not something that I'm really very good at. The plan was to put the Vierlings on the bridge wings (raised) and another set beside the after stack (assuming a layout roughly similar to the historical Torpedoboot 1924, but with the aft superfiring 10.5cm mounting moved forward).

However, i'm not necessarily averse to replacing the 4 quad 2cm mountings with 6 twins, or possibly twins on the bridge wings and a raised Vierling on the centerline over the forward or aft triple torpedo mount.