Torpedo Boat and Light Combatant Rules

[Carthaginian]

Guys... this isn't about confusing the classifications.
The powerplant restrictions DO NOT need to apply to destroyers or cruisers, Jef.

This is about finding a systems that will allow us to build the small torpedo craft that existed in the late 1800s and down as far as the 1920's. It is VERY VERY HARD to make them work in SS. I was simply trying to make the Torpedo Boat category a bit more workable.

[snip]

Well, seems I got confused as well :o

[Desertfox]

On the topic of mini cruisers, after playing a bit more with the above design:

Enter ship name, Enter country Enter ship type laid down 1910

Displacement:
   1,138 t light; 1,195 t standard; 1,250 t normal; 1,294 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (323.00 ft / 320.00 ft) x 29.00 ft x (12.00 / 12.27 ft)
   (98.45 m / 97.54 m) x 8.84 m  x (3.66 / 3.74 m)

Armament:
      6 - 5.00" / 127 mm 45.0 cal guns - 63.03lbs / 28.59kg shells, 150 per gun
     Breech loading guns in deck mounts, 1910 Model
     4 x Single mounts on centreline, evenly spread
     2 x Single mounts on sides, forward deck aft
      Weight of broadside 378 lbs / 172 kg
      Main Torpedoes
      6 - 20.0" / 508 mm, 30.00 ft / 9.14 m torpedoes - 1.689 t each, 10.136 t total
   In 2 sets of deck mounted carriage/fixed tubes
      Mines
      50 - 500.00 lbs / 226.80 kg mines - 11.161 t total
   in Above water - Stern racks/rails

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.50" / 13 mm         -               -

   - Conning towers: Forward 1.00" / 25 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 28,792 shp / 21,479 Kw = 32.00 kts
   Range 1,500nm at 10.00 kts
   Bunker at max displacement = 100 tons (90% coal)

Complement:
   104 - 136

Cost:
   £0.157 million / $0.628 million

Distribution of weights at normal displacement:
   Armament: 84 tons, 6.7 %
      - Guns: 58 tons, 4.6 %
      - Weapons: 27 tons, 2.1 %
   Armour: 10 tons, 0.8 %
      - Armament: 8 tons, 0.6 %
      - Conning Tower: 3 tons, 0.2 %
   Machinery: 708 tons, 56.6 %
   Hull, fittings & equipment: 309 tons, 24.7 %
   Fuel, ammunition & stores: 112 tons, 9.0 %
   Miscellaneous weights: 27 tons, 2.2 %
      - Hull above water: 15 tons
      - On freeboard deck: 12 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     244 lbs / 111 Kg = 3.9 x 5.0 " / 127 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.25
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 11.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.46
   Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
   Hull has raised forecastle,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.393 / 0.398
   Length to Beam Ratio: 11.03 : 1
   'Natural speed' for length: 17.89 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   25.00 %,  17.00 ft / 5.18 m,  17.00 ft / 5.18 m
      - Forward deck:   30.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
      - Aft deck:   30.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
      - Quarter deck:   15.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
      - Average freeboard:      12.50 ft / 3.81 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 198.4 %
      - Above water (accommodation/working, high = better): 108.5 %
   Waterplane Area: 5,685 Square feet or 528 Square metres
   Displacement factor (Displacement / loading): 45 %
   Structure weight / hull surface area: 30 lbs/sq ft or 144 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.82
      - Overall: 0.57
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

[Desertfox]

How about allowing transom sterns on torpedo boats? Provided they meet certain criteria, like say over 20kts and under 200 tons, and they get say an automatic 10% boost in regular speed?

[Carthaginian]

How about allowing transom sterns on torpedo boats? Provided they meet certain criteria, like say over 20kts and under 200 tons, and they get say an automatic 10% boost in regular speed?

No.
Too far out of period.
Call back in the 30's.