Accession Number : AD0767237

Title :   Techniques for Reducing the Vibration of Rocket Launchers Mounted on Helicopters.

Descriptive Note : Technical rept.,

Corporate Author : ARMY MISSILE COMMAND REDSTONE ARSENAL ALA GROUND EQUIPMENT AND MATERIALS DIRECTORATE

Personal Author(s) : Johnson,C. D.

Report Date : 15 JAN 1972

Pagination or Media Count : 38

Abstract : The report is concerned with various techniques that might be used to achieve high quality vibration isolation for equipment mounted on a helicopter. Of specific interest is the problem of reducing the rotor induced vibration of externally mounted rocket launchers. Three schemes for reducing rocket launcher vibrations are proposed. The first scheme is along the lines of traditional vibration isolation methods. The second scheme uses a novel device called a 'vibration absorber' which (theoretically) can completely eliminate sinusoidal launcher vibrations - provided the vibration frequencies are constant. The third proposed scheme is somewhat newer, and more exotic, and leads to what can be called an 'active' vibration absorber. (Author)

Descriptors :   (*ROCKET LAUNCHERS, *VIBRATION ISOLATORS), (*HELICOPTERS, WEAPON SYSTEMS), VIBRATION, DAMPING, RESONANT FREQUENCY, MOUNTING BRACKETS, MATHEMATICAL MODELS, EXTERNAL STORES

Subject Categories : Helicopters
      Rockets
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE