Something to look for if your design "doesn't work"

If you design is not working in Springsharp, you may have neglected to fill in some critical piece. That is especially true if your design is relatively conservative. I just tried the larger German 1915 destroyer with 6-23.4in torpedo tubes, and had a "hard time". I thought it should be able to make 35 knots, but I would have to grow the displacement too much for that to be feasible. I had to settle for 34 knots. This is intended to be a "super destroyer", but it is not very "super".

Ger/DL/1915b1, Germany Destroyer laid down 1916

Displacement:
	2,304 t light; 2,389 t standard; 2,525 t normal; 2,633 t full load

Dimensions: Length overall / water x beam x draught
	390.84 ft / 390.00 ft x 40.00 ft x 12.00 ft (normal load)
	119.13 m / 118.87 m x 12.19 m  x 3.66 m

Armament:
      4 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1916 Model
	  Breech loading guns in deck mounts 
	  on centreline, evenly spread, all raised mounts
	  Aft Main mounts separated by engine room
	Weight of broadside 250 lbs / 113 kg
	Shells per gun, main battery: 250
	6 - 23.4" / 594.36 mm above water torpedoes

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 2 shafts, 55,969 shp / 41,753 Kw = 34.00 kts
	Range 1,750nm at 15.00 kts
	Bunker at max displacement = 243 tons

Complement:
	177 - 231

Cost:
	£0.537 million / $2.148 million

Distribution of weights at normal displacement:
	Armament: 31 tons, 1.2 %
	Machinery: 1,580 tons, 62.6 %
	Hull, fittings & equipment: 693 tons, 27.4 %
	Fuel, ammunition & stores: 220 tons, 8.7 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  597 lbs / 271 Kg = 9.6 x 5.0 " / 127 mm shells or 0.3 torpedoes
	Stability (Unstable if below 1.00): 1.68
	Metacentric height 3.0 ft / 0.9 m
	Roll period: 9.7 seconds
	Steadiness	- As gun platform (Average = 50 %): 51 %
			- Recoil effect (Restricted arc if above 1.00): 0.11
	Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.472
	Length to Beam Ratio: 9.75 : 1
	'Natural speed' for length: 19.75 kts
	Power going to wave formation at top speed: 68 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	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:		24.00 ft / 7.32 m
	   - Forecastle (20 %):	20.00 ft / 6.10 m
	   - Mid (41 %):		20.00 ft / 6.10 m (14.00 ft / 4.27 m aft of break)
	   - Quarterdeck (15 %):	14.00 ft / 4.27 m
	   - Stern:		14.00 ft / 4.27 m
	   - Average freeboard:	16.78 ft / 5.11 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 211.8 %
		- Above water (accommodation/working, high = better): 116.7 %
	Waterplane Area: 10,138 Square feet or 942 Square metres
	Displacement factor (Displacement / loading): 57 %
	Structure weight / hull surface area: 37 lbs/sq ft or 181 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.52
		- Longitudinal: 1.63
		- Overall: 0.58
	Hull space for machinery, storage, compartmentation is extremely poor
	Room for accommodation and workspaces is adequate