REDUCTION OF THE TEMPERATURE COEFFICIENT OF BALLISTICS OF 20MM AIRCRAFT AMMUNITION
Abstract
A rolled ball propellant-primer system was developed for the 20 mm M55 cartridge which exhibits a substantially lower temperature coefficient of ballistics than that obtained with the standard cartridge assembled with the unro led WC 870 ball propellant and the M52A3B1 primer. In test action firings, the experimental cartridge yielded a velocity spread (in the range -65 to 160 F) approximately one-third that obtained with the standard cartridge. A 20 percent reduction in the pressure spread was also obtained. In the M39 automatic gun, the velocity spread obtained with the experimental ammunition in this temperature range was approximately half that obtained with the standard. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1961
- Accession Number
- AD0267081
Entities
People
- C.w. Dittrich
- M.e. Levy
Organizations
- Frankford Arsenal