Evaluation of Back-Blast Pressures Produced by a Wing-Mounted 105-MM recoilless Rifle
Abstract
Results are presented from an analytical study to develop means of reducing the back-blast pressures produced on the tail boom of an AH-1G helicopter by the firing of a 105-mm wing-mounted recoilless rifle. Computer codes were developed for predicting the back-blast fields and are partially substantiated by comparisons of calculated pressures with results from recent Picatinny firing tests. The desirability of reducing back-blast pressures through use of a multiple nozzle and by varying the firing chamber pressure profile is explored. It is found that the blast-field pressures can be reduced significantly by decreasing the average chamber pressure during the first 4 milliseconds after diaphragm burst.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1974
- Accession Number
- AD0786528
Entities
People
- J. Ray Reutenik
- Norman P. Hobbs
- Robert Similey
- William N. Lee