Accession Number:

AD0855630

Title:

Engineering Flight Test of the YCH-47C Medium Transport Helicopter. Army Preliminary Evaluation II

Descriptive Note:

Final rept. 1 Jun 1966-Feb 1969

Corporate Author:

ARMY AVIATION SYSTEMS TEST ACTIVITY EDWARDS AFB CA

Report Date:

1969-02-01

Pagination or Media Count:

200.0

Abstract:

The evaluation consisted of limited level flight performance tests and stability and control tests. Within the scope of tests all but six stability and control requirements of the detail and military specifications were met. Correction of two deficiencies is mandatory for acceptable mission capabilities. These deficiencies are the static and dynamic longitudinal stability improved helicopter capabilities. Safety of flight was affected by aft rotor blade stall characteristics in maneuvering flight and bank angles above 30 degrees and requires a reduction in maximum bank angles permitted. High aft rotor flight control component stress levels associated with maneuvering flight and operation at limit airspeeds requires that a visual flight loads display be incorporated in the cockpit.

Subject Categories:

  • Aerodynamics
  • Helicopters
  • Transport Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE