NAVYPEDIA

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Ships

No	Name	Yard No	Builder	Laid down	Launched	Comm	Fate
BB67	Montana		Philadelphia N Yd	---	---	---	cancelled 21.7.1943
BB68	Ohio		Philadelphia N Yd	---	---	---	cancelled 21.7.1943
BB69	Maine		New York N Yd, Brooklyn	---	---	---	cancelled 21.7.1943
BB70	New Hampshire		New York N Yd, Brooklyn	---	---	---	cancelled 21.7.1943
BB71	Louisiana		Norfolk N Yd, Portsmouth	---	---	---	cancelled 21.7.1943

Technical data

Displacement standard, t	60500
Displacement full, t	70500
Length, m	271.3 wl 281.9 oa
Breadth, m	36.9
Draught, m	11.2 full load
No of shafts	4
Machinery	4 sets geared steam turbines, 8 boilers
Power, h. p.	172000
Max speed, kts	28
Fuel, t	oil 7300
Endurance, nm(kts)	15000 (15)
Armour, mm	belt: 409 - 259 on 25mm plating, lower belt: 183 - 25, main deck: 152 - 187, upper deck: 57, splinter deck: 16 - 19, bulkheads: 457 - 387, barbettes: 457 - 541, turrets: 572 face, 232 crown, 254 sides, 305 rear, CT: 457 sides, 184 roof
Armament	4 x 3 - 406/50 Mk 7, 10 x 2 - 127/54 Mk 16, 8 x 4 - 40/56 Mk 1.2, 20 x 1 - 20/70 Mk 4, 2 catapults, 3 seaplanes (OS2U, SC)
Electronic equipment	presumably 2x SG, SK-2, 2x Mk 8, 4x Mk 12.22, Mk 27 radars
Complement	2149

Standard scale images

Graphics

Project history

Relatively slow ships protected against new 406mm shells. At first 457mm guns were considered, later they were replaced by 12 406/50mm (but in quadruple turrets to save a length). Finally ships would had hull form as North Carolinas, four main triple turrets and new 127/54mm secondary guns. As a result new very strong protected and heavy armoured ship can not pass existing locks of Panama Canal, and simultaneously money been appropriated for a 3rd set of locks. 5 ships were authorized under the Act of 19.7.1940 but suspended at Presidential direction in April 1942 owing a steel shortage, new locks of Panama Canal were also cancelled. Finally all five ships were cancelled 21.7.1943.

Ship protection

Main belt, inclined at 19° to vertical, would been 409mm thick (on 25mm STS plating) at upper part tapering to 259mm at lower edge. Belt was connected with end barbettes by 457mm fore and 387mm aft bulkheads. Lower belt, inclined at 10°, had 183mm (abreast machinery)-216mm (abreast magazines) thickness at upper edge tapering to 25mm at lower edge. Flat main armour deck was connected with upper edge of belt and was 147mm (on 57mm plating) over citadel. One level higher there was 38mm upper deck. One level lower there was flat 19-16mm splinter deck. Steering gear had own belt and roof. Main gun turrets had 572mm faces. Fore barbettes over main deck were 572mm at the sides, aft barbettes had up to 457mm protection.