Accession Number : AD0880948

Title :   Flight Test Results of a DAVI Isolated Platform.

Descriptive Note : Final rept.,

Corporate Author : KAMAN AEROSPACE CORP BLOOMFIELD CT

Personal Author(s) : Jones, Robert

Report Date : NOV 1970

Pagination or Media Count : 201

Abstract : The report contains the results of a flight test evaluation of the Dynamic Antiresonant Vibration Isolator (DAVI). In this program, three series of tests were conducted for four different weight configurations of a DAVI isolated platform. The first series of tests evaluated the unidirectional DAVI, the second series of tests evaluated the two-dimensional DAVI, and the third series of tests evaluated the three-dimensional DAVI. The test results showed that the unidirectional and the two-dimensional DAVI isolated platforms did not achieve the expected reduction in vibration and, in some conditions, reduction was very poor. However, the reduction of vibration obtained on the three-dimensional DAVI isolated platform was excellent. A comparison of results obtained on the three-dimensional isolated platform and a conventionally isolated platform shows that the three-dimensional DAVI isolated platform had the lower vibration level and was less sensitive to changes in isolated weight or to changes in helicopter rotor speed (excitation frequency). (Author)

Descriptors :   (*HELICOPTER ROTORS, VIBRATION ISOLATORS), (*VIBRATION ISOLATORS, FLIGHT TESTING), HELICOPTERS, STATISTICAL DATA.

Subject Categories : Helicopters

Distribution Statement : APPROVED FOR PUBLIC RELEASE