QuoteOE-TB-1911, Ottoman Empire Large Torpedo Boat laid down 1911 (Engine 1909)
Displacement:
750 t light; 777 t standard; 835 t normal; 882 t full load
Dimensions: Length overall / water x beam x draught
229.66 ft / 229.66 ft x 24.61 ft x 9.84 ft (normal load)
70.00 m / 70.00 m x 7.50 m x 3.00 m
Armament:
2 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1911 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread
4 - 0.59" / 15.0 mm guns in single mounts, 0.10lbs / 0.05kg shells, 1911 Model
Breech loading guns in deck mounts
on side, all amidships
Weight of broadside 71 lbs / 32 kg
Shells per gun, main battery: 250
4 - 18.0" / 457.2 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm - -
Machinery:
Coal fired boilers, steam turbines,
Direct drive, 2 shafts, 20,014 shp / 14,931 Kw = 29.00 kts
Range 2,000nm at 10.00 kts
Bunker at max displacement = 105 tons (100% coal)
Complement:
76 - 100
Cost:
£0.099 million / $0.394 million
Distribution of weights at normal displacement:
Armament: 9 tons, 1.1 %
Armour: 9 tons, 1.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 9 tons, 1.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 463 tons, 55.5 %
Hull, fittings & equipment: 246 tons, 29.5 %
Fuel, ammunition & stores: 85 tons, 10.2 %
Miscellaneous weights: 23 tons, 2.8 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
215 lbs / 97 Kg = 6.1 x 4.1 " / 105 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 0.8 ft / 0.2 m
Roll period: 11.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.22
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.526
Length to Beam Ratio: 9.33 : 1
'Natural speed' for length: 15.15 kts
Power going to wave formation at top speed: 75 %
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: 19.69 ft / 6.00 m
- Forecastle (20 %): 16.40 ft / 5.00 m
- Mid (50 %): 13.12 ft / 4.00 m
- Quarterdeck (15 %): 11.48 ft / 3.50 m
- Stern: 11.48 ft / 3.50 m
- Average freeboard: 14.00 ft / 4.27 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 190.7 %
- Above water (accommodation/working, high = better): 83.3 %
Waterplane Area: 3,855 Square feet or 358 Square metres
Displacement factor (Displacement / loading): 40 %
Structure weight / hull surface area: 25 lbs/sq ft or 124 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 5.41
- Overall: 0.63
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Misc 23 tons: 10 tons light radio, 4 tons 4 torpedoes & 9 tons construction reserve
Hmmm ...
This is a rather fat torpedo-boat. With a leaner hull and a lower block-coefficient, an equally powerful ship could probably be built on less tonnage.
I made the huller thinner and longer, net result is another 0.75 knots on the same tonnage.
Michael
QuoteOE-TB-1911, Ottoman Empire Large Torpedo Boat laid down 1911 (Engine 1909)
Displacement:
749 t light; 776 t standard; 834 t normal; 881 t full load
Dimensions: Length overall / water x beam x draught
246.06 ft / 246.06 ft x 24.61 ft x 9.84 ft (normal load)
75.00 m / 75.00 m x 7.50 m x 3.00 m
Armament:
2 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1911 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread
4 - 0.59" / 15.0 mm guns in single mounts, 0.10lbs / 0.05kg shells, 1911 Model
Breech loading guns in deck mounts
on side, all amidships
Weight of broadside 71 lbs / 32 kg
Shells per gun, main battery: 250
4 - 18.0" / 457.2 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm - -
Machinery:
Coal fired boilers, steam turbines,
Direct drive, 2 shafts, 20,615 shp / 15,379 Kw = 29.75 kts
Range 2,000nm at 10.00 kts
Bunker at max displacement = 105 tons (100% coal)
Complement:
76 - 100
Cost:
£0.099 million / $0.396 million
Distribution of weights at normal displacement:
Armament: 9 tons, 1.1 %
Armour: 9 tons, 1.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 9 tons, 1.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 466 tons, 55.8 %
Hull, fittings & equipment: 243 tons, 29.1 %
Fuel, ammunition & stores: 85 tons, 10.2 %
Miscellaneous weights: 23 tons, 2.8 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
207 lbs / 94 Kg = 5.9 x 4.1 " / 105 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 0.8 ft / 0.3 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.490
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 15.69 kts
Power going to wave formation at top speed: 72 %
Trim (Max stability = 0, Max steadiness = 100): 70
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: 18.04 ft / 5.50 m
- Forecastle (20 %): 13.94 ft / 4.25 m
- Mid (50 %): 12.80 ft / 3.90 m
- Quarterdeck (15 %): 11.65 ft / 3.55 m
- Stern: 11.65 ft / 3.55 m
- Average freeboard: 13.15 ft / 4.01 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 191.8 %
- Above water (accommodation/working, high = better): 85.0 %
Waterplane Area: 3,998 Square feet or 371 Square metres
Displacement factor (Displacement / loading): 39 %
Structure weight / hull surface area: 25 lbs/sq ft or 124 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 3.91
- Overall: 0.61
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Misc 23 tons: 10 tons light radio, 4 tons 4 torpedoes & 9 tons construction reserve