Accession Number:

ADA109514

Title:

Flying Qualities Evaluation RU-21A CEFIRM LEADER Airplane.

Descriptive Note:

Final rept.,

Corporate Author:

ARMY AVIATION ENGINEERING FLIGHT ACTIVITY EDWARDS AFB CA

Report Date:

1974-12-01

Pagination or Media Count:

37.0

Abstract:

The United States Army Aviation Engineering Flight Activity conducted a flying qualitites evaulation of the RU-21A CEFIRM LEADER airplane. Flight tests encompassed 6.8 flight hours. Testing was conducted to evaluate the handling qualities of the RU-21A CEFIRM LEADER airplane within the contractor-developed flight envelope. The design changes incorporated in the RU-21A CEFIRM LEADER aircraft produced no significant change in the aircraft handling qualities. The contractors flight envelope was determined to be acceptable and it is recommended that the RU-21A CEFIRM LEADER supplement to the oeprators manual incorporate stall airspeed data on the results of these tests. Five shortcomings were determined but need not be corrected until future designs. They are, in order of importance excessive right aileron displacement required during the approach and landing sequence, ineffective lateral trim system, inaudible stall warning at high power settings, early activation of the artificial stall warning system, and high pilot workload in airspeed and altitude retention. Within the scope of this evaluation, the flight handling qualities of the RU-21A CEFIRM LEADER airplane are acceptable.

Subject Categories:

  • Transport Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE