M1 Mortar
Encyclopedia : M : M1 : M1M : M1 Mortar
General data
- Weight: 136 lb assembled; tube 44.5 lb; mount 46.5 lb; base plate 45 lb.
- Overall length: 3 ft 9.5 in.
- Muzzle velocity (HE): 700 ft/s
- Rate of fire: 18 round/min norm; 30-35 round/min max
- Maximum range (HE): 3290 yd
- Sight: M4
Ammunition
- M43A1 Light HE: 6.87 lb; range min 200 yd; range max 3290; 80% frag radius 25 yd (comparing favorably with 75 mm howitzer); fast detonating fuze (explode on surface).
- M45, M45B1 Heavy HE: 10.62 lb; range max 2558 yd; bursting radius comparable with 105 mm howitzer; equipped with delay fuze so some penetration possible for demolition use.
- M56 Heavy HE: 15.01 lb; range max 1300 yards; adjustable fuze for quick or delay operation.
- M57 WP (White Phosphorus): 10.74 lb; range max 2470 yd; designed to lay down screening smoke, but had definite anti-personnel and incendiary applications.
- M57 FS: 10.74 lb, range max 2470 yd; laid down dense white smoke.
- M301 Illuminating shell: range max 2200 yd; attached to parachute; burned brightly (275,000 candela) for about 60 seconds, illuminating an area of about 150 yards diameter; used M84 time fuze, adjustable from 5 to 25 seconds before priming charge detonated, releasing the illum and chute.
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