Bölthorn , laid down 1928, sunk 04-02-36 (bomb, fire)
Egdir , laid down 1929, refitted 1935
Displacement:
2.000 t light; 2.081 t standard (2.000 t officially); 2.723 t normal; 3.238 t full load
Dimensions: Length overall / water x beam x draught
340,71 ft / 328,08 ft x 45,93 ft x 13,12 ft (normal load)
103,85 m / 100,00 m x 14,00 m x 4,00 m
Armament:
4 - 4,13" / 105 mm guns in single mounts, 35,32lbs / 16,02kg shells, 1928 Model
Breech loading guns in deck mounts
on side, evenly spread
Aft Main mounts separated by engine room
4 - 1,57" / 40,0 mm guns (2x2 guns), 1,95lbs / 0,88kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
4 - 0,79" / 20,0 mm guns (2x2 guns), 0,24lbs / 0,11kg shells, 1928 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 150 lbs / 68 kg
Shells per gun, main battery: 300
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1,38" / 35 mm 164,90 ft / 50,26 m 8,37 ft / 2,55 m
Ends: Unarmoured
Main Belt covers 77% of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,98" / 25 mm 0,39" / 10 mm -
3rd: 0,59" / 15 mm - -
4th: 0,39" / 10 mm - -
- Armour deck: 0,79" / 20 mm
Machinery:
Diesel Internal combustion motors,
Geared drive, 3 shafts, 14.746 shp / 11.000 Kw = 23,63 kts
Range 10.550nm at 15,00 kts
Bunker at max displacement = 1.157 tons
Complement:
188 - 245
Cost:
£0,573 million / $2,292 million
Distribution of weights at normal displacement:
Armament: 19 tons, 0,7%
Armour: 238 tons, 8,8%
- Belts: 86 tons, 3,2%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 8 tons, 0,3%
- Armour Deck: 144 tons, 5,3%
- Conning Tower: 0 tons, 0,0%
Machinery: 459 tons, 16,9%
Hull, fittings & equipment: 884 tons, 32,5%
Fuel, ammunition & stores: 723 tons, 26,6%
Miscellaneous weights: 400 tons, 14,7%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4.665 lbs / 2.116 Kg = 132,1 x 4,1 " / 105 mm shells or 1,3 torpedoes
Stability (Unstable if below 1.00): 1,22
Metacentric height 2,2 ft / 0,7 m
Roll period: 12,9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0,05
Seaboat quality (Average = 1.00): 1,20
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,482
Length to Beam Ratio: 7,14 : 1
'Natural speed' for length: 18,11 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 20,00 degrees
Stern overhang: 4,92 ft / 1,50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21,16 ft / 6,45 m
- Forecastle (20%): 13,52 ft / 4,12 m
- Mid (50%): 13,52 ft / 4,12 m
- Quarterdeck (15%): 13,52 ft / 4,12 m
- Stern: 13,52 ft / 4,12 m
- Average freeboard: 14,13 ft / 4,31 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 77,3%
- Above water (accommodation/working, high = better): 135,3%
Waterplane Area: 9.879 Square feet or 918 Square metres
Displacement factor (Displacement / loading): 160%
Structure weight / hull surface area: 59 lbs/sq ft or 287 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,93
- Longitudinal: 1,89
- 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
Good seaboat, rides out heavy weather easily
The vessel carries 6 floatplanes of WW2 vintage
After Refit:
Displacement:
2.011 t light; 2.081 t standard; 2.723 t normal; 3.238 t full load
Dimensions: Length overall / water x beam x draught
340,71 ft / 328,08 ft x 45,93 ft x 13,12 ft (normal load)
103,85 m / 100,00 m x 14,00 m x 4,00 m
Armament:
2 - 4,13" / 105 mm guns in single mounts, 35,32lbs / 16,02kg shells, 1928 Model
Breech loading guns in deck mounts
on side, evenly spread
6 - 0,79" / 20,0 mm guns (1x6 guns), 0,24lbs / 0,11kg shells, 1933 Model
Machine guns in deck mount
on centreline forward, all raised guns
4 - 1,57" / 40,0 mm guns (2x2 guns), 1,95lbs / 0,88kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
4 - 0,79" / 20,0 mm guns (2x2 guns), 0,24lbs / 0,11kg shells, 1928 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 81 lbs / 37 kg
Shells per gun, main battery: 300
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1,38" / 35 mm 164,90 ft / 50,26 m 8,37 ft / 2,55 m
Ends: Unarmoured
Main Belt covers 77% of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,98" / 25 mm 0,59" / 15 mm -
2nd: 0,59" / 15 mm - -
3rd: 0,59" / 15 mm - -
4th: 0,39" / 10 mm - -
- Armour deck: 0,79" / 20 mm, Conning tower: 0,79" / 20 mm
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 14.746 shp / 11.000 Kw = 23,63 kts
Range 10.550nm at 15,00 kts
Bunker at max displacement = 1.157 tons
Complement:
188 - 245
Cost:
£0,547 million / $2,187 million
Distribution of weights at normal displacement:
Armament: 10 tons, 0,4%
Armour: 239 tons, 8,8%
- Belts: 86 tons, 3,2%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 6 tons, 0,2%
- Armour Deck: 144 tons, 5,3%
- Conning Tower: 3 tons, 0,1%
Machinery: 459 tons, 16,9%
Hull, fittings & equipment: 903 tons, 33,2%
Fuel, ammunition & stores: 712 tons, 26,1%
Miscellaneous weights: 400 tons, 14,7%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4.821 lbs / 2.187 Kg = 136,5 x 4,1 " / 105 mm shells or 1,4 torpedoes
Stability (Unstable if below 1.00): 1,21
Metacentric height 2,2 ft / 0,7 m
Roll period: 13,0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0,03
Seaboat quality (Average = 1.00): 1,20
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,482
Length to Beam Ratio: 7,14 : 1
'Natural speed' for length: 18,11 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 20,00 degrees
Stern overhang: 4,92 ft / 1,50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21,16 ft / 6,45 m
- Forecastle (20%): 13,52 ft / 4,12 m
- Mid (50%): 13,52 ft / 4,12 m
- Quarterdeck (15%): 13,52 ft / 4,12 m
- Stern: 13,52 ft / 4,12 m
- Average freeboard: 14,13 ft / 4,31 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 74,7%
- Above water (accommodation/working, high = better): 135,3%
Waterplane Area: 9.879 Square feet or 918 Square metres
Displacement factor (Displacement / loading): 166%
Structure weight / hull surface area: 60 lbs/sq ft or 293 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,96
- Longitudinal: 1,94
- Overall: 1,03
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
Good seaboat, rides out heavy weather easily
The vessel carries 6 floatplanes of WW2 vintage.