An insult? Maybe. Maybe not.
See, I´m planning to build a very, very similar design. I guess both of us took a look at the Condottieri-class Typ A and B stats. The difference between out designs is that I achieved the same or maybe even a slightly better design on more than 1000ts less than Harry. I used a light displacement below 5000ts to be able to build those units in a very short time. The hull strength is even lower but by dropping the designs poweroutput to 62.000kW (34,966kn) I get the same hull strength. In this case Harry would get 1,034kn more speed and less armor for >1000ts additional tons.
Here´s my design. Feel free to compare. It´s definitively on the edge of size where one can use DD-rules but compared to Harry´s design it shouldn´t be a problem.
Condottieri Class A, South African Minecruiser laid down 1927
Displacement:
4.995 t light; 5.197 t standard; 5.676 t normal; 6.037 t full load
Loading submergence 457 tons/feet
Dimensions:
551,18 ft x 53,64 ft x 16,80 ft (normal load)
168,00 m x 16,35 m x 5,12 m
Armament:
8 - 5,91" / 150 mm guns (4 Main turrets x 2 guns, 2 superfiring turrets)
6 - 4,13" / 105 mm AA guns
12 - 1,57" / 40 mm guns
Weight of broadside 1.059 lbs / 480 kg
8 - 21,0" / 533 mm above water torpedoes
Armour:
Belt 1,18" / 30 mm, ends unarmoured
Belts cover 178% of normal area
Main turrets 0,98" / 25 mm, AA gun shields 0,98" / 25 mm
Armour deck 0,79" / 20 mm, Conning tower 1,57" / 40 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 88.435 shp / 65.972 Kw = 35,50 kts
Range 5.000nm at 15,00 kts
Complement:
326 - 425
Cost:
£2,461 million / $9,845 million
Distribution of weights at normal displacement:
Armament: 132 tons, 2,3%
Armour: 603 tons, 10,6%
Belts: 271 tons, 4,8%, Armament: 88 tons, 1,6%, Armour Deck: 233 tons, 4,1%
Conning Tower: 11 tons, 0,2%, Torpedo bulkhead: 0 tons, 0,0%
Machinery: 2.792 tons, 49,2%
Hull, fittings & equipment: 1.419 tons, 25,0%
Fuel, ammunition & stores: 681 tons, 12,0%
Miscellaneous weights: 50 tons, 0,9%
Metacentric height 3,1
Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1,29
Shellfire needed to sink: 1.283 lbs / 582 Kg = 12,5 x 5,9 " / 150 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0,5
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 71 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0,39
Relative quality as seaboat: 1,01
Hull form characteristics:
Block coefficient: 0,400
Sharpness coefficient: 0,29
Hull speed coefficient 'M': 9,45
'Natural speed' for length: 23,48 kts
Power going to wave formation at top speed: 59 %
Trim: 70
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 177,6%
Relative accommodation and working space: 136,1%
(Average = 100%)
Displacement factor: 78%
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0,50
(Structure weight / hull surface area: 50 lbs / square foot or 245 Kg / square metre)
Relative longitudinal hull strength: 0,72
(for 17,88 ft / 5,45 m average freeboard, freeboard adjustment 4,36 ft)
Relative composite hull strength: 0,51