This design is built as an coastal patrol, and escort by navy surplus weapons from scrapped older ships, only the 40mm AA is new.
K105, Sweden Gunboat laid down 1940
Displacement:
793 t light; 830 t standard; 855 t normal; 875 t full load
Dimensions: Length overall / water x beam x draught
268,89 ft / 262,47 ft x 39,37 ft x 9,84 ft (normal load)
81,96 m / 80,00 m x 12,00 m x 3,00 m
Armament:
2 - 5,98" / 152 mm guns (1x2 guns), 101,41lbs / 46,00kg shells, 1912 Model
Quick firing guns in a turret (on a barbette)
on centreline forward
8 - 1,57" / 40,0 mm guns (4x2 guns), 1,95lbs / 0,88kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, all aft, 2 raised mounts - superfiring
8 - 0,31" / 8,0 mm guns (4x2 guns), 0,02lbs / 0,01kg shells, 1939 Model
Machine guns in deck mounts
on centreline, all amidships, all raised mounts - superfiring
Weight of broadside 219 lbs / 99 kg
Shells per gun, main battery: 150
4 - 18,0" / 457,2 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0,59" / 15 mm 144,36 ft / 44,00 m 7,51 ft / 2,29 m
Ends: Unarmoured
Main Belt covers 85 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,97" / 50 mm 0,98" / 25 mm 1,97" / 50 mm
2nd: 0,20" / 5 mm - -
3rd: 0,20" / 5 mm - -
- Armour deck: 0,20" / 5 mm, Conning tower: 0,59" / 15 mm
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 3 082 shp / 2 299 Kw = 20,00 kts
Range 1 500nm at 12,00 kts (Bunkerage = 46 tons)
Complement:
78 - 102
Cost:
£0,381 million / $1,523 million
Distribution of weights at normal displacement:
Armament: 29 tons, 3,4 %
Armour: 78 tons, 9,1 %
- Belts: 28 tons, 3,3 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 23 tons, 2,7 %
- Armour Deck: 26 tons, 3,0 %
- Conning Tower: 1 tons, 0,1 %
Machinery: 82 tons, 9,6 %
Hull, fittings & equipment: 574 tons, 67,2 %
Fuel, ammunition & stores: 62 tons, 7,2 %
Miscellaneous weights: 30 tons, 3,5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2 621 lbs / 1 189 Kg = 24,5 x 6,0 " / 152 mm shells or 1,3 torpedoes
Stability (Unstable if below 1.00): 1,07
Metacentric height 1,4 ft / 0,4 m
Roll period: 13,9 seconds
Steadiness - As gun platform (Average = 50 %): 92 %
- Recoil effect (Restricted arc if above 1.00): 0,34
Seaboat quality (Average = 1.00): 1,84
Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0,294
Length to Beam Ratio: 6,67 : 1
'Natural speed' for length: 19,95 kts
Power going to wave formation at top speed: 47 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10,00 degrees
Stern overhang: 3,28 ft / 1,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 17,81 ft / 5,43 m
- Forecastle (30 %): 16,40 ft / 5,00 m (11,35 ft / 3,46 m aft of break)
- Mid (50 %): 11,35 ft / 3,46 m
- Quarterdeck (15 %): 11,35 ft / 3,46 m
- Stern: 11,35 ft / 3,46 m
- Average freeboard: 13,04 ft / 3,97 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 61,9 %
- Above water (accommodation/working, high = better): 156,7 %
Waterplane Area: 7 029 Square feet or 653 Square metres
Displacement factor (Displacement / loading): 170 %
Structure weight / hull surface area: 60 lbs/sq ft or 295 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,86
- Longitudinal: 4,09
- Overall: 1,00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
Built with surplus arnament from battleships, cruisers and destroyers.