WesWorld

A mobile floating drydock for MAS and other small craft. Able to lift about 500tons max, but space is a greater limitation.

1000hp diesel gives power for 10knts maximum speed. Also used for onboard electrical power and drives a large displacement pump for flooding/evacuating the tanks. 2 sets of fins help give added stability in the roll. It'll be useful in repairing damage, changing props, rudders.

A couple of units are expected to be built in 1933

laid down 1933

Displacement:
1,741 t light; 1,777 t standard; 1,816 t normal; 1,847 t full load

Dimensions: Length overall / water x beam x draught
333.29 ft / 328.08 ft x 65.62 ft x 3.28 ft (normal load)
101.59 m / 100.00 m x 20.00 m x 1.00 m

Machinery:
Diesel Internal combustion motors,
Geared drive, 1 shaft, 1,000 shp / 746 Kw = 10.28 kts
Range 4,000nm at 5.00 kts
Bunker at max displacement = 70 tons

Complement:
138 - 180

Cost:
£0.307 million / $1.229 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 29 tons, 1.6 %
Hull, fittings & equipment: 1,022 tons, 56.2 %
Fuel, ammunition & stores: 75 tons, 4.2 %
Miscellaneous weights: 690 tons, 38.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,368 lbs / 3,796 Kg = 77.5 x 6 " / 152 mm shells or 3.0 torpedoes
Stability (Unstable if below 1.00): 1.43
Metacentric height 4.9 ft / 1.5 m
Roll period: 12.4 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 0.85

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.900
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 18.11 kts
Power going to wave formation at top speed: 16 %
Trim (Max stability = 0, Max steadiness = 100): 59
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.53 ft / 9.00 m
- Forecastle (20 %): 29.53 ft / 9.00 m (8.20 ft / 2.50 m aft of break)
- Mid (50 %): 8.20 ft / 2.50 m
- Quarterdeck (15 %): 8.20 ft / 2.50 m
- Stern: 8.20 ft / 2.50 m
- Average freeboard: 12.47 ft / 3.80 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 47.7 %
- Above water (accommodation/working, high = better): 235.0 %
Waterplane Area: 20,757 Square feet or 1,928 Square metres
Displacement factor (Displacement / loading): 243 %
Structure weight / hull surface area: 46 lbs/sq ft or 223 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.10
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

500tons lifting capacity
190tons machinery and supplies

My own personal opinion, neat design. I'd toyed with something similar albiet closer to my multi purpose sub repair/tenders with an inclosed dock and overhead crane to lift armaments ect.

Not sure its really economical though. Material wise MTB's are cheap with our infrastructure/build rules and most small shipyards should be able to repair damaged MTB's anyway, at least of the wooden variety.

Might be usefull for larger steel hulled vessels though.

Quoted

Might be usefull for larger steel hulled vessels though.

Aluminium hulled larger MAS and those varieties with foils...

Denmark can supply Diesels of superior quality, if your interested in a joint venture, possibly with a larger (x2) size class also?

but bigger, with shallow draft, to transport ships on her internal waterways.

I think Fiat, CRM and Isotta-Fraschini make perfectly good 1000hp diesel engines.

A joint venture is easy enough. Actually having something as mobile as this that can lift 1000ton+ destroyers will prove problematic.