My anachronistic version of the armoured corvette Penelope

In my papers from 1988, I had a sketch plan of my anachronistic design for the armoured corvette Penelope (originally completed in 1868). I kept the general dimensions, gun calibers, and armour thicknesses. The speed is greater, as the design has greater capacity for performance, due to the later period. My design has a normal displacement of 4,470 tons, 4-8in, 2-5in, and 2-4in guns. The belt is 6in and I have a 2in deck. The speed is 15.5 knots, with a range of 3,750nm at 12 knots. My ship looks like a 1890's cruiser, with a flush deck and clipper bow. This is the Springsharp report:

Penelope, Great Britain Armoured Corvette laid down 1908 (Engine 1904)

Displacement:
 3,839 t light; 3,991 t standard; 4,470 t normal; 4,853 t full load

Dimensions: Length overall / water x beam x draught
 277.00 ft / 275.00 ft x 50.00 ft x 16.75 ft (normal load)
 84.43 m / 83.82 m x 15.24 m  x 5.11 m

Armament:
      4 - 8.00" / 203 mm guns (2x2 guns), 256.00lbs / 116.12kg shells, 1908 Model
   Breech loading guns in turrets (on barbettes)
   on centreline, all forward
      2 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1908 Model
   Quick firing guns in casemate mounts 
   on centreline, all amidships
      2 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1908 Model
   Quick firing guns in casemate mounts 
   on centreline, all aft
 Weight of broadside 1,213 lbs / 550 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 160.00 ft / 48.77 m 8.00 ft / 2.44 m
 Ends: 6.00" / 152 mm 115.00 ft / 35.05 m 8.00 ft / 2.44 m
 Upper: 6.00" / 152 mm   65.00 ft / 19.81 m 8.00 ft / 2.44 m
   Main Belt covers 90 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.00" / 25 mm 160.00 ft / 48.77 m 16.00 ft / 4.88 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm
 2nd: 4.50" / 114 mm 3.00" / 76 mm  4.50" / 114 mm
 3rd: 4.50" / 114 mm 3.00" / 76 mm  4.50" / 114 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 6.00" / 152 mm

Machinery:
 Coal fired boilers, complex reciprocating steam engines, 
 Direct drive, 2 shafts, 4,435 ihp / 3,308 Kw = 15.50 kts
 Range 3,750nm at 12.00 kts
 Bunker at max displacement = 862 tons (100% coal)

Complement:
 273 - 355

Cost:
 £0.353 million / $1.412 million

Distribution of weights at normal displacement:
 Armament: 152 tons, 3.4 %
 Armour: 1,600 tons, 35.8 %
    - Belts: 757 tons, 16.9 %
    - Torpedo bulkhead: 95 tons, 2.1 %
    - Armament: 314 tons, 7.0 %
    - Armour Deck: 400 tons, 9.0 %
    - Conning Tower: 35 tons, 0.8 %
 Machinery: 652 tons, 14.6 %
 Hull, fittings & equipment: 1,435 tons, 32.1 %
 Fuel, ammunition & stores: 631 tons, 14.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   7,021 lbs / 3,185 Kg = 27.4 x 8.0 " / 203 mm shells or 1.7 torpedoes
 Stability (Unstable if below 1.00): 1.12
 Metacentric height 2.2 ft / 0.7 m
 Roll period: 14.2 seconds
 Steadiness - As gun platform (Average = 50 %): 97 %
   - Recoil effect (Restricted arc if above 1.00): 0.76
 Seaboat quality  (Average = 1.00): 1.94

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.679
 Length to Beam Ratio: 5.50 : 1
 'Natural speed' for length: 16.58 kts
 Power going to wave formation at top speed: 51 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  20.00 ft / 6.10 m
    - Forecastle (20 %): 17.00 ft / 5.18 m
    - Mid (50 %):  17.00 ft / 5.18 m
    - Quarterdeck (15 %): 17.00 ft / 5.18 m
    - Stern:  17.00 ft / 5.18 m
    - Average freeboard: 17.24 ft / 5.25 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 122.1 %
  - Above water (accommodation/working, high = better): 128.3 %
 Waterplane Area: 10,818 Square feet or 1,005 Square metres
 Displacement factor (Displacement / loading): 109 %
 Structure weight / hull surface area: 85 lbs/sq ft or 415 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.88
  - Longitudinal: 3.26
  - Overall: 1.00
 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
 Excellent seaboat, comfortable, can fire her guns in the heaviest weather