A better report for the GB/DT/1914 design

My friend Cliff conceived of a destroyer-like vessel that had a heavy torpedo armament for the size. The drawing resembles a WWII German torpedo boat. It had just a minimal gun armament with one 4in QF gun. The speed was 31.8 knots. We had allowed for 250 tons of oil fuel. This is a comparison of the original weights and the Springsharp weights:

           Original    Springsharp
Hull:      297 tons    279 tons
Armament:   31 tons      4 tons
Machinery: 431 tons    492 tons
Misc:       72 tons    125 tons
Aux. Mach.: 30 tons    -

This is the full Springsharp report:

GB/DT/1914, Great Britain Torpedo Boat laid down 1914 (Engine 1927)

Displacement:
 775 t light; 796 t standard; 900 t normal; 984 t full load

Dimensions: Length overall / water x beam x draught
 267.00 ft / 265.00 ft x 28.00 ft x 11.50 ft (normal load)
 81.38 m / 80.77 m x 8.53 m  x 3.51 m

Armament:
      1 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1914 Model
   Quick firing gun in deck mount 
   on centreline forward
 Weight of broadside 32 lbs / 15 kg
 Shells per gun, main battery: 150
 9 - 21.0" / 533.4 mm above water torpedoes

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 25,663 shp / 19,145 Kw = 31.80 kts
 Range 3,200nm at 15.00 kts
 Bunker at max displacement = 188 tons

Complement:
 81 - 106

Cost:
 £0.127 million / $0.506 million

Distribution of weights at normal displacement:
 Armament: 4 tons, 0.4 %
 Machinery: 492 tons, 54.7 %
 Hull, fittings & equipment: 279 tons, 31.0 %
 Fuel, ammunition & stores: 125 tons, 13.9 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   255 lbs / 115 Kg = 8.0 x 4.0 " / 102 mm shells or 0.2 torpedoes
 Stability (Unstable if below 1.00): 1.18
 Metacentric height 1.0 ft / 0.3 m
 Roll period: 11.7 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.05
 Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.369
 Length to Beam Ratio: 9.46 : 1
 'Natural speed' for length: 16.28 kts
 Power going to wave formation at top speed: 70 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 3.00 degrees
 Stern overhang: 1.00 ft / 0.30 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  19.00 ft / 5.79 m
    - Forecastle (20 %): 13.00 ft / 3.96 m
    - Mid (50 %):  13.00 ft / 3.96 m
    - Quarterdeck (15 %): 13.00 ft / 3.96 m
    - Stern:  13.00 ft / 3.96 m
    - Average freeboard: 13.48 ft / 4.11 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 180.0 %
  - Above water (accommodation/working, high = better): 22.6 %
 Waterplane Area: 4,509 Square feet or 419 Square metres
 Displacement factor (Displacement / loading): 54 %
 Structure weight / hull surface area: 27 lbs/sq ft or 134 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.48
  - Longitudinal: 3.59
  - Overall: 0.59
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is extremely poor