Forgot about this one. The 6 O'Brien class DDs will be converted to training ships. Basically a set of torpedo tubes and one 5" gun will be removed, as well as half the turbine plant. Nothing is being added so no cost is associated with the conversion.
E-01 class (ex-O'Brien class), Mexico (ex-USA) Training Destroyer laid down 1915
Displacement:
862 t light; 894 t standard; 1,051 t normal; 1,177 t full load
Dimensions: Length overall / water x beam x draught
305.00 ft / 305.00 ft x 31.20 ft x 9.50 ft (normal load)
92.96 m / 92.96 m x 9.51 m x 2.90 m
Armament:
2 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1931 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread
2 - 1.10" / 27.9 mm guns (1x2 guns), 0.67lbs / 0.30kg shells, 1931 Model
Anti-aircraft guns in deck mount
on centreline aft
Weight of broadside 126 lbs / 57 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.50" / 13 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 9,725 shp / 7,255 Kw = 25.00 kts
Range 3,500nm at 15.00 kts
Bunker at max displacement = 283 tons
Complement:
92 - 120
Cost:
£0.138 million / $0.553 million
Distribution of weights at normal displacement:
Armament: 16 tons, 1.5 %
Armour: 3 tons, 0.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 368 tons, 35.0 %
Hull, fittings & equipment: 465 tons, 44.3 %
Fuel, ammunition & stores: 189 tons, 18.0 %
Miscellaneous weights: 10 tons, 1.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
984 lbs / 447 Kg = 15.8 x 5.0 " / 127 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 1.2 ft / 0.4 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.18
Seaboat quality (Average = 1.00): 1.56
Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.407
Length to Beam Ratio: 9.78 : 1
'Natural speed' for length: 17.46 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 69
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: 18.00 ft / 5.49 m
- Forecastle (20 %): 18.00 ft / 5.49 m (11.00 ft / 3.35 m aft of break)
- Mid (50 %): 11.00 ft / 3.35 m
- Quarterdeck (15 %): 11.00 ft / 3.35 m
- Stern: 11.00 ft / 3.35 m
- Average freeboard: 12.40 ft / 3.78 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 126.3 %
- Above water (accommodation/working, high = better): 95.2 %
Waterplane Area: 5,882 Square feet or 546 Square metres
Displacement factor (Displacement / loading): 120 %
Structure weight / hull surface area: 44 lbs/sq ft or 215 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.38
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather