Montana Class Battleships Class Overview

Dimensions, machinery and performance (as designed)

Length:
921' 5"
Engines:
4 Westinghouse geared steam turbines
Beam:
121'
Boilers:
12 Babcock & Wilcox (oil fired)
Draft:
38'
Shafts:
4
Displacement:
65,000 std. / 70,500 full
HP:
172,000
Speed:
28 knots
Crew:
3,000
Range:
15,000 NM @ 12 knots


Armament (as designed)
Number Carried
Type
Arrangement
Maximum Range / Ceiling
12
16"/50 (406mm) Mk 7
4 triple turrets
42,345 yards @ 45° (24 miles)
2,700 lb. HE shell
Rate of fire 2 RPM

20
5"/38 (127mm) Mk 12
10 twin turrets
17,392 yards @ 45° (9.8 miles)
AA ceiling 37,200'
53-55.18 lb shells
Rate of fire 15-22 RPM

40
1.57"/56 (40mm)
10 quad mounts
11,133 yards @ 45° (6.3 miles)
AA ceiling 22,299'
1.985 lb. HE shell
Rate of fire 130-160 RPM

42-48
.79"/70 (20mm)
AA machine guns
single mounts
4,800 yards @ 45° (2.7 miles)
AA ceiling 10,000'
.271 lb. HE shell
Rate of fire 250-320 RPM

2
Torpedo tubes
single launchers
N/A
4
Aircraft


Name
Builder (Planned)
Philadelphia Naval Shipyard
Philadelphia Naval Shipyard
New York Naval Shipyard
New York Naval Shipyard
Norfolk Naval Shipyard

Construction was suspended on all Montana Class ships on May 20, 1942 and cancelled on July 21, 1943
before they were laid down.

Note: Even though two battleships were named Montana neither one was ever completed.


Page revised Sept. 8, 2007