[SIZE=3]Airmed, Danish-built Irish Sloop laid down 1924 (Rebuilt 1940)[/SIZE]
Displacement:
893 t light; 948 t standard; 1,191 t normal; 1,385 t full load
Dimensions: Length overall / water x beam x draught
286.73 ft / 280.00 ft x 33.00 ft x 10.00 ft (normal load)
87.40 m / 85.34 m x 10.06 m x 3.05 m
Armament:
3 - 4.50" / 114 mm guns in single mounts, 45.56lbs / 20.67kg shells, 1940 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount
2 - 1.57" / 40.0 mm guns (1x2 guns), 1.95lbs / 0.89kg shells, 1940 Model
Anti-aircraft guns in deck mount
on centreline aft, all raised guns - superfiring
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.89kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
12 - 0.79" / 20.0 mm guns (1x12 guns), 0.24lbs / 0.11kg shells, 1924 Model
Machine guns in deck mount
on side, all raised guns
Weight of broadside 151 lbs / 69 kg
Shells per gun, main battery: 350
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -
2nd: 0.75" / 19 mm - -
3rd: 0.50" / 13 mm - -
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 8,154 shp / 6,083 Kw = 24.00 kts
Range 8,000nm at 15.00 kts
Bunker at max displacement = 438 tons
Complement:
100 - 131
Cost:
£0.240 million / $0.960 million
Distribution of weights at normal displacement:
Armament: 19 tons, 1.6 %
Armour: 8 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 8 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 218 tons, 18.3 %
Hull, fittings & equipment: 547 tons, 45.9 %
Fuel, ammunition & stores: 298 tons, 25.1 %
Miscellaneous weights: 100 tons, 8.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,212 lbs / 1,003 Kg = 48.5 x 4.5 " / 114 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 1.2 ft / 0.4 m
Roll period: 12.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.34
Seaboat quality (Average = 1.00): 1.40
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.451
Length to Beam Ratio: 8.48 : 1
'Natural speed' for length: 19.48 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.50 ft / 5.64 m
- Forecastle (20 %): 16.50 ft / 5.03 m
- Mid (50 %): 16.50 ft / 5.03 m (9.75 ft / 2.97 m aft of break)
- Quarterdeck (15 %): 9.75 ft / 2.97 m
- Stern: 9.75 ft / 2.97 m
- Average freeboard: 13.29 ft / 4.05 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 83.1 %
- Above water (accommodation/working, high = better): 150.2 %
Waterplane Area: 6,128 Square feet or 569 Square metres
Displacement factor (Displacement / loading): 171 %
Structure weight / hull surface area: 51 lbs/sq ft or 249 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 3.24
- Overall: 1.02
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
Changes:
- Replacement of the 130mm deck gun with British 4.5" DP single.
- Replacement of 57mm guns with Bofors 40mm.
- Re-engining with 1940 B+W diesels, and improvement of range.
- Installation of modern ASDIC and other electronics (probably not including radar)
- Renovation of internal spaces