Accession Number:

AD0784132

Title:

Model 301 HLH/ATC (Heavy Lift Helicopter/Advanced Technology Component) Transmission Noise Reduction Program

Descriptive Note:

Final rept.

Corporate Author:

BOEING VERTOL CO PHILADELPHIA PA

Personal Author(s):

Report Date:

1974-05-01

Pagination or Media Count:

175.0

Abstract:

The report presents the results of a transmission noise reduction program. The emphasis of the program is to reduce transmission noise at its source. The program included a dynamic test of a CH-47C helicopter transmission with internal instrumentation to measure strains, displacements, and accelerations of rotating components and external instrumentation to measure case acceleration and noise levels. Test results were used to verify prediction methodology which in turn was used to analyze the dynamic response of the Heavy Lift Helicopter HLH transmission components. Modified author abstract

Subject Categories:

  • Helicopters
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE