These are electrically primed cartridges with high-explosive-incendiary projectiles and centrifugally armed, point-detonating fuzes. They are used in the M39, M61, M168, and M195 automatic cannons. The cartridge case is unpainted but has nomenclature and …

In warfare, high-explosive incendiary (HEI) is a type of ammunition specially designed to impart energy and therefore damage to its target in one or both of two ways: via a high-explosive charge and/or via its incendiary (fire-causing) effects. Each round—by definition—has both capabilities.

The established, proven and reliable M50 series ammunition is compatible with all 20mm M61, M197, M39 and M621 gun systems worldwide.

The projectile, in addition to the M505A3 fuze, consists of a high explosive incendiary (HEI) charge, self-destroying (SD) relay charge, and a tracer charge. These charges form the SD chain. The tracer burns for about 3 to 7 seconds, whereupon the relay charge is ignited which detonates the HEI charge low order.

The 20mm x 102 PGU Suite have an optimized aero ballistic shapes that reduces time-of-flight and increase velocity at range for increased probability of hit. The PGU-28A/B Semi Armor Piercing High Explosive Incendiary (SAPHEI) provides broad target spectrum capability by combining light armor and high explosive features into a single round.

20 mm x 128 HEI/SD and HEI-T/SD. Highly efficient High Explosive/Incendiary (HEI) rounds for anti-aircraft use on the Oerlikon guns.

20 mmx102 HEI-T (M56 A3) Technical Specifications: Cartridge Length: max. 168.02 mm: Cartridge Weight ~ 263 g: Velocity (23.7 m) 1030±15 m/sec: Velocity Standard Deviation: max. 12.19 m/sec: Mean Pressure:

1998年11月10日 · Twenty-millimeter ammunition is the ammo used on the M197 automatic gun. The rounds are electrically primed; chamber pressure varies from 60,500 to 61,500 psi. Projectile weight of the M56 HEI round is 1,543 grains (3.5 ounces); other 20-mm projectiles are of comparable weight.

2017年11月20日 · The M50 series ammunition is compatible with all 20mm M61, M197, M39 and M621 gun systems worldwide. General Dynamics Ordnance and Tactical Systems M50 Series ammunition is established, proven and reliable. The M50 series consists of: - M56 High Explosive Incendiary (HEI) which produces a large number of small, high velocity fragments for

The Cartridge, HEI, Mk 1, w/ Fuze, Percussion, DA, No. 253 Mk. I /A/, was adopted from the British in 1941. Little modification has followed except in the redesign of the cartridge case and primer. The fuzed projectile remains the same as may be …