Admiralty Type 1916
Original configuration
32 ships
Refited: (16 ships) Uproar, Upstart, Upstage, Unruly, Uncouth, Unorthodox, Unity, Underhand, Upbeat, Upset, Upstage, Ultar, Unerring, Undying, Unnerve and Unswerving sold to Colombia
Converted: (2 ships) Upsurge and Uprising, taken out of service
Decomissioned awaiting sale or disposal: (4 ships) Union, Unicorn, Unique and Undermine
8 ships: (Ursa, Umbra, Underpin, Unfeeling, Unseen and Unmoved,Underwing, Upshur) sold to Colombia
2 Ships: Urainia, Uphold sold to Chile after conversion to SC tenders.
Admiralty class DD, Atlantis Destroyer laid down 1916
Displacement:
1,123 t light; 1,156 t standard; 1,244 t normal; 1,315 t full load
Dimensions: Length overall / water x beam x draught
310.00 ft / 310.00 ft x 30.00 ft x 10.50 ft (normal load)
94.49 m / 94.49 m x 9.14 m x 3.20 m
Armament:
3 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1916 Model
Breech loading guns in deck mounts
on centreline ends, majority aft
2 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 97 lbs / 44 kg
Shells per gun, main battery: 150
4 - 18.0" / 457.2 mm above water torpedoes
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 39,799 shp / 29,690 Kw = 34.00 kts
Range 4,500nm at 10.00 kts
Bunker at max displacement = 159 tons
Complement:
104 - 136
Cost:
£0.253 million / $1.011 million
Distribution of weights at normal displacement:
Armament: 12 tons, 1.0 %
Machinery: 750 tons, 60.3 %
Hull, fittings & equipment: 341 tons, 27.4 %
Fuel, ammunition & stores: 121 tons, 9.7 %
Miscellaneous weights: 20 tons, 1.6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
249 lbs / 113 Kg = 7.8 x 4.0 " / 102 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.27
Metacentric height 1.3 ft / 0.4 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality (Average = 1.00): 0.72
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.446
Length to Beam Ratio: 10.33 : 1
'Natural speed' for length: 17.61 kts
Power going to wave formation at top speed: 71 %
Trim (Max stability = 0, Max steadiness = 100): 83
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (20 %): 18.00 ft / 5.49 m
- Mid (40 %): 10.00 ft / 3.05 m
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 12.56 ft / 3.83 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 203.6 %
- Above water (accommodation/working, high = better): 95.1 %
Waterplane Area: 5,913 Square feet or 549 Square metres
Displacement factor (Displacement / loading): 40 %
Structure weight / hull surface area: 30 lbs/sq ft or 147 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.52
- Longitudinal: 1.67
- Overall: 0.58
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
------------------------------------------------------------------------
Rebuilt version
Uproar, Upstart, Upstage, Unruly, Uncouth, Unorthodox, Unity and Underhand all rebuilt
Admiralty class DD Refit, Atlantis Destroyer laid down 1916 (Engine 1926)
Displacement:
1,130 t light; 1,171 t standard; 1,244 t normal; 1,303 t full load
Dimensions: Length overall / water x beam x draught
313.53 ft / 310.00 ft x 30.00 ft x 10.50 ft (normal load)
95.56 m / 94.49 m x 9.14 m x 3.20 m
Armament:
4 - 4.50" / 114 mm guns (2x2 guns), 45.56lbs / 20.67kg shells, 1926 Model
Quick firing guns in deck mounts with hoists
on centreline ends, evenly spread
2 - 1.57" / 39.9 mm guns (1x2 guns), 1.93lbs / 0.88kg shells, 1926 Model
Anti-aircraft guns in deck mount
on centreline amidships
8 - 1.00" / 25.4 mm guns (4x2 guns), 0.50lbs / 0.23kg shells, 1926 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 190 lbs / 86 kg
Shells per gun, main battery: 150
6 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 30,570 shp / 22,805 Kw = 32.00 kts
Range 4,500nm at 10.00 kts
Bunker at max displacement = 131 tons
Complement:
104 - 136
Cost:
£0.245 million / $0.979 million
Distribution of weights at normal displacement:
Armament: 24 tons, 1.9 %
Armour: 9 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 9 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 643 tons, 51.7 %
Hull, fittings & equipment: 435 tons, 34.9 %
Fuel, ammunition & stores: 114 tons, 9.2 %
Miscellaneous weights: 20 tons, 1.6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
330 lbs / 150 Kg = 7.2 x 4.5 " / 114 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 0.9 ft / 0.3 m
Roll period: 13.6 seconds
Steadiness - As gun platform (Average = 50 %): 65 %
- Recoil effect (Restricted arc if above 1.00): 0.49
Seaboat quality (Average = 1.00): 0.78
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.446
Length to Beam Ratio: 10.33 : 1
'Natural speed' for length: 17.61 kts
Power going to wave formation at top speed: 69 %
Trim (Max stability = 0, Max steadiness = 100): 83
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (20 %): 18.00 ft / 5.49 m
- Mid (40 %): 10.00 ft / 3.05 m
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 12.56 ft / 3.83 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 183.2 %
- Above water (accommodation/working, high = better): 67.6 %
Waterplane Area: 5,913 Square feet or 549 Square metres
Displacement factor (Displacement / loading): 57 %
Structure weight / hull surface area: 38 lbs/sq ft or 187 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.62
- Longitudinal: 1.95
- Overall: 0.70
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather