I have tried a 6-shaft plant for the battlecruiser and found that it is hardly worth the effort. Increasing the power to an outrageous 380,000 SHP only gets 37.885 knots at 34,339.9 tons. The dimensions were 812ft x 87.5ft x 30.47ft with a Cp of 0.61 and a Cm of 0.91. I was able to increase the protection:
- main battery turrets: 11in basis (greatest thickness)
- main battery barbettes: 9in basis
- lower belt: 9in
- upper belt: 6in
- deck forward: 2in
- deck aft: 3in
- a/t bulkhead: 1.5in
- shields on 4in guns: 1in
Metacentric height at legend displacement (GM)=5.25 ft
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