Investigation of Damaged Lands of M185 Cannon Mounted on the 155-mm M109A1 Howitzer
Abstract
This is a final report on the investigation into the prime cause of damaged lands in the M185 cannon and into the safety of firing fielded ammunition in an M185 cannon with land damage. It was determined that firing projectiles from an unseated position in the chamber can result in flattened and stripped lands representative of that reported near the commencement of rifling. When compared to an undamaged tube with similar wear, the damaged tube showed an insignificant difference in the probable error of range and deflection. No inbore forces could be identified which would compromise the safe firing of a projectile/fuze system. Consequently, a change to the criteria for tube condemnation was initiated to exclude the type of land damage reported.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1985
- Accession Number
- ADA157902
Entities
People
- R. J. Kopmann
Organizations
- United States Army Armament Research, Development and Engineering Center