M110 155mm Projectile
The M110 / M110A1 White Phosphorus (WP) projectiles are available for 105mm and 155mm howitzers. Used for screening, spotting and signaling purposes, they have an additional incendiary effect on a target and processes casualty producing effects. This burster-tube type projectile is ballistically similar to the M107 HE (155mm)and M1(105mm) projectiles. It can be fitted with a mechanical time Super Quick fuze M582 or M557/M739 PD fuze.
The M110A2 is a 155mm Smoke projectile used to provide screening or marking smoke. There is a secondary incendiary effect. The M110A2 has the same general appearance as the M107 and have the same design origin. It is a separate loading munition using a hollow forged steel shell. The shape is ogival with a boat tail for aerodynamic efficiency and a welded steel baseplate. Close to the base is a gilding metal drive band protected by a grommet until just before loading.
By 2004 the Marine Corps was working with the Army on production of M110 White Phosphorus Smoke rounds. After years of struggling to manufacture a burster charge it appeared that the Army is well on its way to over coming this problem and Load, Assembly, and Packing rounds at an Army Ammunition Plant.
The M-101A2 White Phosphorus shell provides screening or marking smoke. Concentrated smoke allows good marking for CAS operations. It deploys about 15.6 lb White Phosphorus, and weighs about 98 lb.
The body of this 155mm projectile consists of a hollow steel shell containing the fill. A fuze adapter is screwed into the body and brazed in place. The agent is added and the burster well is then press-fit into the fuze adapter followed by the M6 Tetrytol burster being installed into the burster well. A fuze well cup made of either aluminum or Bakelite is installed by first coating the lower interior threads of the fuze adapter with sealing compound or cement and the screwing the cup down into the fuze adapter. The M104 is then closed by screwing on a lifting plug. The projectiles are stored unfuzed with 8 rounds per wooden pallet.
The M110 155mm Projectile consists of a hollow steel shell containing 11.7 lbs of sulfur mustard H or HD blister gas. Assembled Chemical Weapons (ACW) are defined as munitions containing both chemical agent and energetic material (explosives and propellants) that are stored in the U.S. chemical weapons stockpile. The agent is in the form of either blister agent [mustard agent H, HD, or HT] or nerve agent [GB, also known as Sarin, or VX]. The M121, M121A1, M104, M110, M122 155-mm projectiles include GB, VX, H, and HD. The M104 contains 11.7 lbs of sulfur mustard blister gas. The M121 contains 6.5 lbs of sarin nerve gas. The M121A1 contains 6.5 lbs of sarin or 6 lbs of VX nerve gas. The weapon also has a supplementary charge of 0.3 lbs TNT. The M122 contains 6.5 lbs of sarin nerve gas. Three closely related types of blister agents are used in ACWs: the mustard agents H, HD, and HT. Exposure to liquid, aerosol, or vapor forms of these agents causes severe disruption of skin and membrane functions. Major symptoms of mustard exposure commonly do not appear until several hours after exposure. Death may occur if the skin and membrane disruption is sufficiently widespread over the body.
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