ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
Test firings of prototype fin- and flare-stabilized 25 mm training rounds were conducted. The fin-stabilized rounds were found to be capable of fulfilling all of the training round ballistic requirements. The flare- stabilized rounds were studied as a possible lower cost alternative. Initially, a large angle flare design, similar to existing tank gun training round, was tested, but data showed the configuration drag coefficient was too high. Subsequent computer predictions indicated that a small angle flare would have significantly lower drag and sufficient stability for flight. A four-degree flare was fabricated and fired, confirming the drag and stability predictions.
Final technical rept.
Supersedes Rept. no. BRL-IMR-885 dated 19 Mar 1987. DOI: 10.21236/ADA191683