Rocket Motor Peak Noise Reduction Program.
Final rept. 1 Jan-30 Sep 78,
BOEING AEROSPACE CO HUNTSVILLE AL ARMY SYSTEMS DIV
Pagination or Media Count:
This report describes the design, test and analysis of two techniques being developed for reducing the peak noise produced by a shoulder-fired rocket weapon system. The tests have verified that the peak noise produced by the M-72 rocket motor can be reduced at the gunners position by 10 db with a baffled cylinder suppressor and by 1.3 db by aerodynamically shaping the nozzle closure. Analysis of the unsuppressed and suppressed peak noise generated by the M-72 rocket motor indicate that the peak noise in the near field is produced by the energy associated with a strong pressure wave that can be correlated with spherically symmetric point explosion data. The hardware test data base and analysis techniques developed have provided a basis for the design of prototype field weight suppressor systems for protecting the gunner and crew from the intense peak noise produced by both man-portable and shoulder-fired rocket weapon systems. Author
- Protective Equipment