UH-60A Expanded Gross Weight and Center of Gravity Evaluation
Abstract
Testing was conducted to obtain performance and handling qualities at the limits of the expanded gross weight and center of gravity (cg) envelope of the UH-60A helicopter. A total of 38.5 productive flight hours were flown at Edwards Air Force Base, California between 9 June and 22 November 1983. Equivalent flat plate area was minimum with the cg at a fuselage station (FS) of approximately 360 and increased at a more forward and aft cg tested (FS 347 and 366). One deficiency, three shortcomings, and three Prime Item Development Specification noncompliances were identified. One shortcoming, neutral stick- fixed static longitudinal stability in intermediate rated power climb, was associated with envelope expansion. The 4-per-rotor-revolution vibration characteristics, previously identified as a shortcoming, generally were unaffected by increasing gross weight but were aggravated by moving the longitudinal cg further aft. Except for the shortcoming pertaining to neutral static longitudinal stability, the handling qualities were essentially unchanged from those previously reported.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1985
- Accession Number
- ADA180404
Entities
People
- Edward J. Tavares
- Gary L. Skinner
- Joseph C. Miess
- Robert A. Williams
- Robert Macmullin