Accession Number:

ADA180404

Title:

UH-60A Expanded Gross Weight and Center of Gravity Evaluation

Descriptive Note:

Final rept. 9 Jun-22 Nov 1983

Corporate Author:

ARMY AVIATION ENGINEERING FLIGHT ACTIVITY EDWARDS AFB CA

Report Date:

1985-08-01

Pagination or Media Count:

125.0

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.

Subject Categories:

  • Military Aircraft Operations
  • Helicopters

Distribution Statement:

APPROVED FOR PUBLIC RELEASE