155 mm gun T7

155mm L/40 T7
The T7 as mounted on the T30E1 heavy tank
Type Tank gun
Place of origin United States
Service history
Used by United States
Production history
Produced 1940s
Variants T7, T7E1
Specifications
Weight 2,384 kg (5,256 lb)
Length 6.74 m (22 ft 1 in)
Barrel length 6.1976 m (20 ft 4.00 in) (L/40)
Caliber 155 mm (6.1 in)
Rate of fire 2 rpm
Muzzle velocity 701 m/s (2,300 ft/s)
Maximum firing range Project cancelled before maximum range tests occurred

The 155mm L/40 T7 was an American rifled tank gun developed in 1945.[1] The T7 was to be the main armament for the T30 Heavy Tank, but only a handful were produced due to the T30 project being cancelled after trials in the late 1940s.

The T7 used two-part separated ammunition like the 105mm T5E1 gun on the T29 Heavy Tank.[2] It had a low velocity of only 701 m/s (2,300 ft/s) compared to the 120mm T53 on the T34 Heavy Tank (945 m/s) and the 105mm T5E1 on the T29 Heavy Tank (945 m/s).[3] However, the 43 kg (95 lbs) High-Explosive shell was demonstrated to have a powerful demolition effect. Testing concluded before completion when the T30 project was cancelled in the late 1940s.

Variants

  • T7 - Standard model
  • T7E1 - T7 modified for use with a power rammer and ejection equipment.

References

  1. ↑ Hunnicutt, Richard P. (1988). Firepower: A History of the American Heavy Tank. Brattleboro, Vermont: Echo Point Books & Media. p. 228. ISBN 978-0891413042.
  2. ↑ Hunnicutt, Richard P. (1988). Firepower: A History of the American Heavy Tank. Brattleboro, Vermont: Echo Point Books & Media. p. 88. ISBN 978-0891413042.
  3. ↑ Hunnicutt, Richard P. (1988). Firepower: A History of the American Heavy Tank. Brattleboro, Vermont: Echo Point Books & Media. pp. 224–5. ISBN 978-0891413042.


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