M795

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Ready M795 rounds with fuzes fitted.

The M795 155mm projectile is the US Army and US Marine Corps' standard 155mm high explosive (HE) projectile for howitzers. It is a bursting round with fragmentation and blast effects.

The M795 is designed to be a more lethal, longer range version of the M107. A welded band replaced the swaged rotating band of the M107 allowing the M795 to be fired with M119, or M203 propelling charges generating 6,000 meters more range. The explosive payload was also improved as was the fragmentation pattern, giving 30% higher lethality.[1]

Description[edit]

The M795 is a 155mm high fragmentation steel (HF1) body projectile filled with 23.8 pounds (10.8 kg) of TNT and weighing approximately 47 kilograms (103 lb). The high fragmentation steel body is encircled by a gilding metal rotating band making it compatible with 3W through 8S (M3A1 through M203A1) zone propelling charges across all current 155mm howitzers. The projectile is packaged on a metal pallet with a shock attenuating lifting plug and flexible rotating band cover. The M795 projectile is ballistically similar to the M483A1 family of cargo projectiles and may be used as a registration round for the M483A1 family. The M795 projectile provides an increased effectiveness against major ground force threats at greater ranges for anti-personnel and anti-materiel targets when compared to the current M107 projectile.

Course Correcting Fuze[edit]

In mid-2005 United Defense demonstrated a cost-effective system to improve cannon artillery accuracy with the successful firing of inert M795 155-mm cannon projectiles equipped with a two-directional Course Correcting Fuze (CCF). United Defense has developed this new system together with Bofors Defence, Rockwell Collins and BT Fuze Products.

The CCF is a GPS-based innovation that dramatically improves the effectiveness of existing cannon artillery ammunition and provides near-precision accuracy that is critical in combat environments. It can be employed on all types of U.S. 155-mm and 105-mm projectiles in the U.S. Field Artillery inventory, and is ready for a fast track full scale development and early fielding.

United Defense successfully fired M795 rounds equipped with the CCF from a M109A6 Paladin to ranges of 14.5 kilometers at Yuma Proving Ground. Preliminary analysis from the demonstration confirmed United Defense's laboratory analysis and the projectiles equipped with the CCF achieved a precision error of less than 50 meters - three times more accurate than the control rounds.

M795E1[edit]

Talley Defense Systems, Inc., has been selected for the development and fabrication of the upgraded M795E1 Propellant Grain and Igniter components. As the Army's M864 Base Burner Assembly development and production source, Talley delivered nearly one million production base burner assemblies.

An extended range version of the M795 projectile is desirable. Maximum range shall be between 26.5 km (threshold) and 28.5 km (objective), when fired from the M198 weapon system (39 caliber tube) with the M203A1 propelling charge. The maximum range when fired from a Crusader type system (52 caliber tube) shall be 34 km (threshold) to 36 km (objective). Extending the range of the M795 HE projectile provides the ability to engage at an even greater distances and provides for a munitions which is compatible with current and developmental delivery systems and their associated propellants.

The US Army has identified a need to provide extended range 155mm high explosive (HE) projectiles for both current and future artillery systems. Leveraging advanced ballistic design technology from two key stockpile projectiles, the 155mm M795E1 Extended Range High Explosive (HE) Base Burner Projectile will extend maximum range capability for the delivery of enhanced HE payload.

Using the production M795 HE Projectile as a baseline, designers began optimizing ballistic configurations and incorporating an improved drag reduction system, based on the successful 155mm M864 Extended Range DPICM Base Burner Projectile.

Designated the M795E1, this projectile will provide a significantly larger high explosive, high fragmentation warhead and improved lethality over the aging M549A1 HE Rocket Assisted Projectile, and will maintain an extended range capability to counter the longer range artillery threat of potential adversaries.

Although the current M795 offers extended range over the old M107 (22.5 km vs. 17.5 km), it falls short of the Army's other extended range projectiles (28–30 km range). The currently approved M795 Operational Requirement Document (ORD) establishes the need for an extended range version of the M795 to support anticipated warfighting scenarios.

Specifications[edit]

  • Range 22.5 km
  • Weight as fired: 46.7 kg
  • Explosive content:
    • TNT: 10.8 kg with a charge liner OR IMX-101(IMX was adopted by the Army; Marines still use TNT)
  • Length
  • Body diameter: 154.89 mm
  • Driving band diameter:
  • Fuzes (with supplemental charge):
  • Fuzes (without supplemental charge):
  • Manufacturer: Chamberlain Manufacturing Corporation, Scranton Division, Scranton Army Ammunition Plant, Scranton, Pennsylvania, Mason & Hanger - Silas Mason Company, Day & Zimmerman, Parsons, Kan,

CCP[edit]

M795 CCP:

  • CEP 50 Meters

M795E1[edit]

M795E1

  • Range 28.7–37 km

See also[edit]

References[edit]

  • Jane's Ammunition Handbook 2003–2004

External links[edit]