A new Iberian 1,000 ton TBD for 1912

[miketr]

Pushing length and BC to the limit...

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TBD-1912 II, Iberia Torpedo Boat Destroyer laid down 1912

Displacement:
1,000 t light; 1,039 t standard; 1,111 t normal; 1,168 t full load

Dimensions: Length overall / water x beam x draught
393.70 ft / 393.70 ft x 32.81 ft x 7.52 ft (normal load)
120.00 m / 120.00 m x 10.00 m  x 2.29 m

Armament:
      3 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1912 Model
  Breech loading guns in deck mounts
  on centreline ends, majority forward, 1 raised mount
      2 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1912 Model
  Breech loading guns in deck mounts
  on side, all amidships
Weight of broadside 114 lbs / 52 kg
Shells per gun, main battery: 250
6 - 20.0" / 508 mm above water torpedoes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm       -       -
2nd: 0.98" / 25 mm       -       -

Machinery:
Coal and oil fired boilers, steam turbines,
Direct drive, 2 shafts, 20,000 shp / 14,920 Kw = 30.63 kts
Range 2,500nm at 10.00 kts
Bunker at max displacement = 129 tons (67% coal)

Complement:
96 - 125

Cost:
£0.127 million / $0.508 million

Distribution of weights at normal displacement:
Armament: 14 tons, 1.3 %
Armour: 8 tons, 0.8 %
   - Belts: 0 tons, 0.0 %
   - Torpedo bulkhead: 0 tons, 0.0 %
   - Armament: 8 tons, 0.8 %
   - Armour Deck: 0 tons, 0.0 %
   - Conning Tower: 0 tons, 0.0 %
Machinery: 572 tons, 51.5 %
Hull, fittings & equipment: 381 tons, 34.3 %
Fuel, ammunition & stores: 110 tons, 9.9 %
Miscellaneous weights: 25 tons, 2.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
  421 lbs / 191 Kg = 11.9 x 4.1 " / 105 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.46
Metacentric height 1.8 ft / 0.6 m
Roll period: 10.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.11
Seaboat quality  (Average = 1.00): 1.41

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.400
Length to Beam Ratio: 12.00 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 50
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 %): 14.11 ft / 4.30 m
   - Mid (50 %): 13.12 ft / 4.00 m
   - Quarterdeck (15 %): 13.12 ft / 4.00 m
   - Stern: 13.12 ft / 4.00 m
   - Average freeboard: 13.78 ft / 4.20 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 179.2 %
- Above water (accommodation/working, high = better): 149.5 %
Waterplane Area: 7,951 Square feet or 739 Square metres
Displacement factor (Displacement / loading): 60 %
Structure weight / hull surface area: 27 lbs/sq ft or 131 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.16
- Overall: 0.54
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Short range radio 10 tons, Six 20" torpedos (2x3) 6 tons and 9 tons construction reserve

[Borys]

Ahoj!
12:1 - ain't that a lot?
Looks like an excellent design!
Hopefully soon I'll have 6 Type 1 Slips for such ships.
Borys

[miketr]

I asked what the limit was...

http://www.navalism.org/index.php?topic=2398.msg25590#msg25590

0.4 BC and 12:1 L:B was the response.

Michael

[miketr]

OK the combat range of the other ship would have been 150 miles... a little low.

So this design, half a knot of top speed allows a combat range of 330 miles @ 30 knots.

Michael

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TBD-1912 IIa, Iberia Torpedo Boat Destroyer laid down 1912

Displacement:
1,000 t light; 1,040 t standard; 1,183 t normal; 1,297 t full load

Dimensions: Length overall / water x beam x draught
393.70 ft / 393.70 ft x 32.81 ft x 8.02 ft (normal load)
120.00 m / 120.00 m x 10.00 m  x 2.44 m

Armament:
      3 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1912 Model
  Breech loading guns in deck mounts
  on centreline ends, majority forward, 1 raised mount
      2 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1912 Model
  Breech loading guns in deck mounts
  on side, all amidships
Weight of broadside 114 lbs / 52 kg
Shells per gun, main battery: 250
6 - 20.0" / 508 mm above water torpedoes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm       -       -
2nd: 0.98" / 25 mm       -       -

Machinery:
Coal and oil fired boilers, steam turbines,
Direct drive, 2 shafts, 19,500 shp / 14,547 Kw = 30.16 kts
Range 5,000nm at 10.00 kts
Bunker at max displacement = 257 tons (67% coal)

Complement:
100 - 131

Cost:
£0.131 million / $0.524 million

Distribution of weights at normal displacement:
Armament: 14 tons, 1.2 %
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: 600 tons, 50.7 %
Hull, fittings & equipment: 352 tons, 29.7 %
Fuel, ammunition & stores: 183 tons, 15.4 %
Miscellaneous weights: 26 tons, 2.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
  426 lbs / 193 Kg = 12.1 x 4.1 " / 105 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.58
Metacentric height 2.0 ft / 0.6 m
Roll period: 9.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality  (Average = 1.00): 1.30

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.400
Length to Beam Ratio: 12.00 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 54
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: 14.76 ft / 4.50 m
   - Forecastle (20 %): 13.12 ft / 4.00 m
   - Mid (50 %): 12.30 ft / 3.75 m
   - Quarterdeck (15 %): 12.30 ft / 3.75 m
   - Stern: 12.30 ft / 3.75 m
   - Average freeboard: 12.72 ft / 3.88 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 176.0 %
- Above water (accommodation/working, high = better): 134.3 %
Waterplane Area: 7,951 Square feet or 739 Square metres
Displacement factor (Displacement / loading): 66 %
Structure weight / hull surface area: 26 lbs/sq ft or 128 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 0.84
- Overall: 0.52
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Short range radio 10 tons, Six 20" torpedos (2x3) 6 tons and 10 tons construction reserve