WesWorld

Hi!

Has anybody here every tried to design a Higgins Boat (LCVP ) in SpringSharp? Or a LCPL ? Or LCA ?

I tried and failed....

Can you please help me?

Thanks,
HoOmAn

I've tried on occasion. They never work for me, either.

Smallest thing I've been able to sim adequately (in SS3, mind) is a 35 t landing craft.

9 tonnes is beyond my ken.

Closest I'v gotten so far:

LCA-15 Class, Greek Landing Craft Assult laid down 1942

Displacement:
14 t light; 15 t standard; 15 t normal; 15 t full load

Dimensions: Length overall / water x beam x draught
36.49 ft / 36.25 ft x 10.83 ft x 2.58 ft (normal load)
11.12 m / 11.05 m x 3.30 m x 0.79 m

Armament:
2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1942 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 0 lbs / 0 kg
Shells per gun, main battery: 1,500

Machinery:
Diesel Internal combustion motors,
Direct drive, 1 shaft, 132 shp / 99 Kw = 12.00 kts
Range 100nm at 8.00 kts
Bunker at max displacement = 0 tons

Complement:
3 - 4

Cost:
£0.006 million / $0.025 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.1 %
Machinery: 3 tons, 23.0 %
Hull, fittings & equipment: 7 tons, 46.5 %
Fuel, ammunition & stores: 1 tons, 3.7 %
Miscellaneous weights: 4 tons, 26.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
25 lbs / 11 Kg = 401.5 x 0.5 " / 13 mm shells or 0.1 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.2 ft / 0.1 m
Roll period: 9.9 seconds
Steadiness - As gun platform (Average = 50 %): 16 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 0.18

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.518
Length to Beam Ratio: 3.35 : 1
'Natural speed' for length: 6.02 kts
Power going to wave formation at top speed: 83 %
Trim (Max stability = 0, Max steadiness = 100): 29
Bow angle (Positive = bow angles forward): 2.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 7.00 ft / 2.13 m
- Forecastle (20 %): 6.00 ft / 1.83 m
- Mid (50 %): 5.00 ft / 1.52 m
- Quarterdeck (15 %): 5.00 ft / 1.52 m
- Stern: 5.00 ft / 1.52 m
- Average freeboard: 5.43 ft / 1.66 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 105.4 %
- Above water (accommodation/working, high = better): 85.2 %
Waterplane Area: 256 Square feet or 24 Square metres
Displacement factor (Displacement / loading): 136 %
Structure weight / hull surface area: 13 lbs/sq ft or 63 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.77
- Longitudinal: 34.68
- Overall: 1.13
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is cramped
Ship has quick, lively roll, not a steady gun platform
Caution: Lacks seaworthiness - very limited seakeeping ability

Hrolf it seems built some in 1938 for the USN though I think he just used the historical ships rather than simming them in Springsharp, kind of like most do with MTB's.

Quoted

Originally posted by TheCanadian
Hrolf it seems built some in 1938 for the USN though I think he just used the historical ships rather than simming them in Springsharp, kind of like most do with MTB's.

I've done the same for most of my landing craft. I think the smallest ones I've ever simmed out are LCTs and LCIs.

I just use OTL specs.

Okay, I think I just do the same. Spend 10ts in my reports per hull and just define something along the lines of those small crafts I mentioned above...

Well, this is it...



LCP1-18, laid down 1945
LCP19-36, laid down 1946

Displacement: 10 ts standard
Dimensions: 11,45 m / 11,10 m x 3,50 m x 1,05 m
Armament: 2 - 7,62 mm gun
Machinery: Diesel Internal combustion motors, 280hp
Speed: 10 kn
Range: 150 nm
Complement: 4
Load weight: 4 ts or 36 troops


[The LCP Series 45 actually is a variant of OTL American LCVP crafts (Higgins Boat) which were historically build through the 40s. I use this design because SS can´t deal with light crafts.]