|
US Projectile, 155mm Smoke WP, M110 (M110E1), M110A1 (M110E2), M110A2 (M110E3) |
Scroll Prev Top Next More |
Description
These projectiles are fired from 155mm howitzers to produce screening smoke. The projectiles also have a slight incendiary effect.
The 155mm Smoke WP, M110, and M110E1 projectiles consist essentially of a steel shell (casing) containing an M6 burster loaded with tetrytol running through the center of the shell, and an explosive filler of 15.6 lb WP (white phosphorous). An adapter in the nose of the projectile is threaded to receive the fuze. For shipping and handling, a lifting plug is installed in the nose fuze cavity. A rotating band encircles the projectile case near the base and is protected by a grommet for shipment and handling, The grommet is to be removed before loading the projectile in the weapon. A PD fuze is normally used with these projectiles. Except for the WP contents, these projectiles are exactly the same as the projectile H/HD. M110, and the ballistics and configuration are the same as the HE, M107 projectile.
The M110A1 and M110A2 projectiles both contain a comp B5 burster providing greater high temperature tolerance than the tetrytol bursters used in previous models of the M110 series WP projectiles. The M110A2 contains a burster tube assembly with an aluminum plug sealing the base of the tube while the M110A1 contains a plastic plug,
The projectile is light green with a yellow band and light red markings.
Functioning
When the weapon is fired, the burning propellant charge generates rapidly expanding gases to propel the projectile through the barrel and to the velocity required to reach the target. The rotating band engages the barrel rotating band also provides a seal to prevent leakage of gas pressure past the projectile. When the fuze functions, the burster is detonated to rupture the projectile case and disperse the contents. White phosphorous ignites spontaneously upon contact with air and produces a dense white smoke.
Hazardous Components
Filler - WP (15.6 lb, 7.09 kg)
Propelling charge - M3, M4
Physical Data
Length, overall with lifting plug - 26.93 in, 684 mm
See Also
Projectile, 155mm Chemical, M110
Source(s)
