Recommended Design Modifications to the CH-47 Forward Rotor-Drive Gearbox
Abstract
The report describes the results of a study of modifications to existing helicopter power-train hardware for the purpose of reducing acoustic- frequency vibrations and noise. Mechanical vibration analysis methods were put to further tests by applying them to the redesign of CH-47C gearbox components. This program was undertaken carefully and methodically to avoid the excessive costs which often accompany hit-or-miss approaches to gearbox noise reduction. The results include vibration reduction predictions for a number of carefully documented designs. The key products in this overall effort are reduced bearing radial dynamic forces; thus, the results of this program are expected to have major impact upon bearing and gear lifetimes, in addition to the obvious benefits in the area of gearbox noise.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1973
- Accession Number
- AD0769062
Entities
People
- Robert H. Badgley