My "Project Ger/BB/1915" battleship design

The original concept, at least to be published, was for a 60,000 ton battleship of 20 knot speed. Either a redesign, or the stealth design, was for a ship of 72,000 tons with 9-18in/45 guns (180ton) and 24-5in QF (5 ton). The specs were:

• legend displacement: 72,000 tons
• armament: 9-18in/45 (180 ton) and 24-5in QF (5 ton)
• speed: 20 knots
• power: 120,000 SHP (original concept was 60,000 SHP)
• Cp: 0.66
• Cm: 0.98
• dimensions: 750ft x 130ft x 40ft (65ft hull depth)
• machinery weight basis: 40SHP/ton of machinery
• hull weight basis c: 0.29 (x 10^-4)
• machinery weight: 3,000 tons
• hull: 18,400 tons
• auxiliary machinery: 2,770 tons
• armament: 4,000 tons
• protection: 38,070 tons
• miscellaneous: 5,760 tons

I believe that the armor basis was intended to be 16in (belt, barbettes, CT, etc.)