Shipbucket

Hejren Class, Denmark Torpedoboat laid down 1907

Displacement:
	154 t light; 158 t standard; 166 t normal; 172 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(147,64 ft / 146,89 ft) x 15,42 ft x (8,53 / 8,69 ft)
	(45,00 m / 44,77 m) x 4,70 m  x (2,60 / 2,65 m)

Armament:
      2 - 2,24" / 57,0 mm 50,0 cal guns - 5,98lbs / 2,71kg shells, 150 per gun
	  Quick firing guns in deck mounts, 1907 Model
	  2 x Single mounts on centreline, evenly spread
      4 - 0,31" / 8,0 mm 80,0 cal guns - 0,02lbs / 0,01kg shells, 2.000 per gun
	  Machine guns in deck mounts, 1902 Model
	  2 x Single mounts on sides, forward deck aft
      Weight of broadside 12 lbs / 5 kg
      Main Torpedoes
      1 - 17,7" / 450 mm, 19,69 ft / 6,00 m torpedo - 0,897 t total
	In a deck mounted carriage/fixed tube

Armour:
   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	0,24" / 6 mm	      -			      -

Machinery:
	Coal fired boilers, complex reciprocating steam engines, 
	Geared drive, 2 shafts, 4.214 ihp / 3.144 Kw = 25,00 kts
	Range 400nm at 12,00 kts
	Bunker at max displacement = 14 tons (100% coal)
	  Caution: Delicate, lightweight machinery

Complement:
	23 - 30

Cost:
	£0,020 million / $0,081 million

Distribution of weights at normal displacement:
	Armament: 4 tons, 2,5 %
	   - Guns: 3 tons, 1,8 %
	   - Weapons: 1 tons, 0,7 %
	Armour: 1 tons, 0,6 %
	   - Armament: 1 tons, 0,6 %
	Machinery: 101 tons, 61,1 %
	Hull, fittings & equipment: 47 tons, 28,6 %
	Fuel, ammunition & stores: 12 tons, 7,2 %
	Miscellaneous weights: 0 tons, 0,0 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  33 lbs / 15 Kg = 5,9 x 2,2 " / 57 mm shells or 0,1 torpedoes
	Stability (Unstable if below 1.00): 1,16
	Metacentric height 0,4 ft / 0,1 m
	Roll period: 10,2 seconds
	Steadiness	- As gun platform (Average = 50 %): 60 %
			- Recoil effect (Restricted arc if above 1.00): 0,10
	Seaboat quality  (Average = 1.00): 0,76

Hull form characteristics:
	Hull has a flush deck,
	  a normal bow and a cruiser stern
	Block coefficient (normal/deep): 0,300 / 0,305
	Length to Beam Ratio: 9,53 : 1
	'Natural speed' for length: 12,12 kts
	Power going to wave formation at top speed: 67 %
	Trim (Max stability = 0, Max steadiness = 100): 79
	Bow angle (Positive = bow angles forward): 5,00 degrees
	Stern overhang: 0,00 ft / 0,00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	20,00 %,  8,53 ft / 2,60 m,  6,56 ft / 2,00 m
	   - Forward deck:	30,00 %,  6,56 ft / 2,00 m,  5,58 ft / 1,70 m
	   - Aft deck:	35,00 %,  5,58 ft / 1,70 m,  5,58 ft / 1,70 m
	   - Quarter deck:	15,00 %,  5,58 ft / 1,70 m,  5,58 ft / 1,70 m
	   - Average freeboard:		6,08 ft / 1,85 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 201,6 %
		- Above water (accommodation/working, high = better): 62,6 %
	Waterplane Area: 1.331 Square feet or 124 Square metres
	Displacement factor (Displacement / loading): 18 %
	Structure weight / hull surface area: 18 lbs/sq ft or 86 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0,55
		- Longitudinal: 2,90
		- Overall: 0,65
	Extremely poor machinery, storage, compartmentation space
	Cramped accommodation and workspace room
	Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

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