Another design study: Ger/DL/1915

I drew the profile for the Ger/DL/1915, and fell in love with it. The design is a classic DL type. The size is small by later standards, but is not unusual for the Great War. The main compromises were that I had to reduce the speed from 35 knots to 34 knots, and increase the normal displacement. The "Performance" says: "Design well balanced for a light fast combatant". The report complains about the seakeeping ability, however. My drawing actually looks German, which was unusual for me. This is the Springsharp report:

Ger/DL/1915, Germany Destroyer leader laid down 1915

Displacement:
	1,701 t light; 1,739 t standard; 1,904 t normal; 2,036 t full load

Dimensions: Length overall / water x beam x draught
	332.80 ft / 332.00 ft x 32.00 ft x 12.70 ft (normal load)
	101.44 m / 101.19 m x 9.75 m  x 3.87 m

Armament:
      5 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1915 Model
	  Breech loading guns in deck mounts 
	  on centreline, evenly spread, all raised mounts
	Weight of broadside 313 lbs / 142 kg
	Shells per gun, main battery: 0
	4 - 23.6" / 599.44 mm above water torpedoes

Machinery:
	Oil fired boilers, steam turbines, 
	Geared drive, 2 shafts, 51,634 shp / 38,519 Kw = 34.00 kts
	Range 2,500nm at 15.00 kts
	Bunker at max displacement = 297 tons

Complement:
	143 - 187

Cost:
	£0.378 million / $1.510 million

Distribution of weights at normal displacement:
	Armament: 39 tons, 2.1 %
	Machinery: 1,194 tons, 62.7 %
	Hull, fittings & equipment: 468 tons, 24.6 %
	Fuel, ammunition & stores: 203 tons, 10.7 %
	Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  344 lbs / 156 Kg = 5.5 x 5.0 " / 127 mm shells or 0.2 torpedoes
	Stability (Unstable if below 1.00): 1.59
	Metacentric height 2.0 ft / 0.6 m
	Roll period: 9.6 seconds
	Steadiness	- As gun platform (Average = 50 %): 50 %
			- Recoil effect (Restricted arc if above 1.00): 0.30
	Seaboat quality  (Average = 1.00): 0.96

Hull form characteristics:
	Hull has rise forward of midbreak
	Block coefficient: 0.494
	Length to Beam Ratio: 10.38 : 1
	'Natural speed' for length: 18.22 kts
	Power going to wave formation at top speed: 72 %
	Trim (Max stability = 0, Max steadiness = 100): 52
	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:		23.00 ft / 7.01 m
	   - Forecastle (18 %):	21.00 ft / 6.40 m
	   - Mid (33 %):		21.00 ft / 6.40 m (13.00 ft / 3.96 m aft of break)
	   - Quarterdeck (18 %):	13.00 ft / 3.96 m
	   - Stern:		13.00 ft / 3.96 m
	   - Average freeboard:	15.78 ft / 4.81 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 216.2 %
		- Above water (accommodation/working, high = better): 94.0 %
	Waterplane Area: 7,040 Square feet or 654 Square metres
	Displacement factor (Displacement / loading): 45 %
	Structure weight / hull surface area: 30 lbs/sq ft or 146 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.44
		- Longitudinal: 2.40
		- Overall: 0.52
	Hull space for machinery, storage, compartmentation is extremely poor
	Room for accommodation and workspaces is adequate
	Poor seaboat, wet and uncomfortable, reduced performance in heavy weather