WesWorld

I always have trouble with these designs....is she any good?
And if not, where am I going wrong?


E Class, Denmark Submarine laid down 1933

Displacement:
191 t light; 196 t standard; 207 t normal; 216 t full load

Dimensions: Length overall / water x beam x draught
135.58 ft / 135.00 ft x 14.00 ft (Bulges 16.30 ft) x 10.00 ft (normal load)
41.32 m / 41.15 m x 4.27 m (Bulges 4.97 m) x 3.05 m

Armament:
1 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1928 Model
Machine gun in deck mount
on centreline amidships, 1 raised gun
2 - 0.51" / 13.0 mm guns in single mounts, 0.07lbs / 0.03kg shells, 1933 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: 1,000
5 - 17.7" / 450 mm submerged torpedo tubes

Armour:
- Conning tower: 0.59" / 15 mm

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 286 shp / 213 Kw = 12.00 kts
Range 2,000nm at 10.00 kts
Bunker at max displacement = 20 tons

Complement:
26 - 35

Cost:
£0.037 million / $0.150 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Armour: 0 tons, 0.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.2 %
Machinery: 8 tons, 4.0 %
Hull, fittings & equipment: 133 tons, 64.1 %
Fuel, ammunition & stores: 16 tons, 7.5 %
Miscellaneous weights: 50 tons, 24.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
25 lbs / 11 Kg = 101.4 x 0.8 " / 20 mm shells or 0.1 torpedoes
Stability (Unstable if below 1.00): 1.00
Metacentric height 0.3 ft / 0.1 m
Roll period: 13.4 seconds
Steadiness - As gun platform (Average = 50 %): 7 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 0.02

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.329
Length to Beam Ratio: 8.28 : 1
'Natural speed' for length: 11.62 kts
Power going to wave formation at top speed: 35 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 1.00 ft / 0.30 m
- Forecastle (20 %): 1.00 ft / 0.30 m
- Mid (50 %): 1.00 ft / 0.30 m (0.00 ft / 0.00 m aft of break)
- Quarterdeck (15 %): 0.00 ft / 0.00 m
- Stern: 0.00 ft / 0.00 m
- Average freeboard: 0.50 ft / 0.15 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 210.4 %
- Above water (accommodation/working, high = better): 3.9 %
Waterplane Area: 1,158 Square feet or 108 Square metres
Displacement factor (Displacement / loading): 307 %
Structure weight / hull surface area: 69 lbs/sq ft or 336 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3.12
- Longitudinal: 3.29
- Overall: 3.13
Hull space for machinery, storage, compartmentation is extremely poor
Room for accommodation and workspaces is extremely poor
Ship has quick, lively roll, not a steady gun platform
Caution: Lacks seaworthiness - very limited seakeeping ability

IMO shes quite small, a sub double the size would be more usefull and could mount a more potent 2.95-3.95" gun and 3-21" TT's.

BC's too low, which scews everything else. Top speed's probably marginal as well, should probably aim for 14+ knots just to get into position on a spotted target.

Have a go with the spreadsheet instead. Its far better than SS.

I tried the spreadsheet, but it won't allow me to go small enough, so here's no. 2, and she is still a bit bigger than I want.........

E Class(2), Denmark Submarine laid down 1933

Displacement:
256 t light; 262 t standard; 275 t normal; 285 t full load

Dimensions: Length overall / water x beam x draught
135.58 ft / 135.00 ft x 14.00 ft (Bulges 18.00 ft) x 10.00 ft (normal load)
41.32 m / 41.15 m x 4.27 m (Bulges 5.49 m) x 3.05 m

Armament:
1 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1928 Model
Machine gun in deck mount
on centreline amidships, 1 raised gun
2 - 0.51" / 13.0 mm guns in single mounts, 0.07lbs / 0.03kg shells, 1933 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: 1,000
4 - 20.9" / 530 mm submerged torpedo tubes

Armour:
- Conning tower: 0.59" / 15 mm

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 795 shp / 593 Kw = 15.00 kts
Range 2,000nm at 10.00 kts
Bunker at max displacement = 23 tons

Complement:
33 - 43

Cost:
£0.058 million / $0.232 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Armour: 1 tons, 0.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.2 %
Machinery: 23 tons, 8.4 %
Hull, fittings & equipment: 157 tons, 57.3 %
Fuel, ammunition & stores: 19 tons, 6.8 %
Miscellaneous weights: 75 tons, 27.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
38 lbs / 17 Kg = 153.8 x 0.8 " / 20 mm shells or 0.1 torpedoes
Stability (Unstable if below 1.00): 0.97
Metacentric height 0.2 ft / 0.1 m
Roll period: 15.2 seconds
Steadiness - As gun platform (Average = 50 %): 5 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 0.01

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.396
Length to Beam Ratio: 7.50 : 1
'Natural speed' for length: 11.62 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 1.00 ft / 0.30 m
- Forecastle (20 %): 1.00 ft / 0.30 m
- Mid (50 %): 1.00 ft / 0.30 m (0.00 ft / 0.00 m aft of break)
- Quarterdeck (15 %): 0.00 ft / 0.00 m
- Stern: 0.00 ft / 0.00 m
- Average freeboard: 0.50 ft / 0.15 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 186.2 %
- Above water (accommodation/working, high = better): 3.1 %
Waterplane Area: 1,161 Square feet or 108 Square metres
Displacement factor (Displacement / loading): 225 %
Structure weight / hull surface area: 77 lbs/sq ft or 378 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3.29
- Longitudinal: 2.94
- Overall: 3.03
Caution: Poor stability - excessive risk of capsizing
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is extremely poor
Ship has quick, lively roll, not a steady gun platform
Caution: Lacks seaworthiness - very limited seakeeping ability

Small enough?

I've had no problems with torpedoes in that spreadsheet, and that sub ain't no torpedo...

Maybe i'm just reading it wrong, but I can't seem to get it below 650 tons!

Otherwise, how is she, I'm trying to replicate a Finnish sub of the 30's with her.