- Dec 19, 2006
- Reaction score
TomS said:I came across two papers with interesting material on this.
AFATL-TR-84-03 Historical Development Summary of Automatic Cannon Caliber Ammunition: 20-30 Millimeter
This has a couple of sections specifically on caseless and telescoped ammunition, with some discussion of GAU-7/A (and a lot of other interesting topics).
"Page 87 hard Copy:
At the time this was written, we were working on the development of the 25 mm GAU-7 caseless (or more precisely, combustible case) gun system for the F-15 air superiority fighter. As it turned out, vulnerability to fire propagation in the ammunition bay caused a requirement to encase the round in a flame-retardant sheath which was stripped off prior to the round entering the gun, in effect, a "case" which only served part of the functions of a case. The funding and manpower required to develop this entirely new technology was taken from ammunition development; consequently, the problems of atmospheric humidity and inconsistent interior ballistics were not solved in time to get the GAU-7 gun on the F-15 aircraft and the program was cancelled"