The GB/PG/1906 did not work well in Springsharp

The GB/PG/1906 design does not work well in Springsharp. Part of the reason is that Springsharp thinks it will take 56,106 SHP to reach 36 knots. In fact, it should take much less than that. Because of the excessive power requirement, the engines weigh too much for such a small ship. Also, the maximum SHP/ton for 1906 should be about 6o. To go 36 knots, it takes above 70 SHP/ton of machinery. Obviously, we will have to settle for less, to get a reasonable Springsharp design. Given that, 34.5 knots is more reasonable. That allowed me to reduce the draft and displacement. My main problem with it is that it does meet the specification of my friend Cliff from 1971. An example of a comparable ship type that met Cliff's specificationi was the British Tribal class from circa 1906. So why can't we do it in Springsharp? This is the resulting Springsharp report:

GB/PG/1906, Great Britain Fast Gunboat laid down 1906 (Engine 1931)

Displacement:
 1,055 t light; 1,094 t standard; 1,160 t normal; 1,213 t full load

Dimensions: Length overall / water x beam x draught
 275.84 ft / 275.00 ft x 27.00 ft x 13.00 ft (normal load)
 84.08 m / 83.82 m x 8.23 m  x 3.96 m

Armament:
     3 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1906 Model
   Quick firing guns in deck mounts with hoists
   on centreline ends, majority aft
 Weight of broadside 62 lbs / 28 kg
 Shells per gun, main battery: 450

Machinery:
 Oil fired boilers, steam turbines,
 Direct drive, 2 shafts, 43,367 shp / 32,352 Kw = 34.50 kts
 Range 2,950nm at 12.00 kts
 Bunker at max displacement = 119 tons

Complement:
 99 - 129

Cost:
 £0.140 million / $0.558 million

Distribution of weights at normal displacement:
 Armament: 8 tons, 0.7 %
 Machinery: 686 tons, 59.2 %
 Hull, fittings & equipment: 361 tons, 31.1 %
 Fuel, ammunition & stores: 105 tons, 9.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   244 lbs / 111 Kg = 11.8 x 3.5 " / 88 mm shells or 0.2 torpedoes
 Stability (Unstable if below 1.00): 1.29
 Metacentric height 1.1 ft / 0.3 m
 Roll period: 10.8 seconds
 Steadiness - As gun platform (Average = 50 %): 59 %
   - Recoil effect (Restricted arc if above 1.00): 0.24
 Seaboat quality  (Average = 1.00): 1.17

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.421
 Length to Beam Ratio: 10.19 : 1
 'Natural speed' for length: 16.58 kts
 Power going to wave formation at top speed: 74 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 2.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  24.00 ft / 7.32 m
    - Forecastle (20 %): 22.00 ft / 6.71 m
    - Mid (32 %):  22.00 ft / 6.71 m (14.00 ft / 4.27 m aft of break)
    - Quarterdeck (15 %): 14.00 ft / 4.27 m
    - Stern:  14.00 ft / 4.27 m
    - Average freeboard: 16.72 ft / 5.10 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 197.0 %
  - Above water (accommodation/working, high = better): 137.9 %
 Waterplane Area: 4,631 Square feet or 430 Square metres
 Displacement factor (Displacement / loading): 44 %
 Structure weight / hull surface area: 26 lbs/sq ft or 128 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.39
  - Longitudinal: 6.61
  - Overall: 0.52
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent