Accession Number:

AD0893683

Title:

UH-1N Category 2 Airframe and Subsystems Evaluation

Descriptive Note:

Final rept.

Corporate Author:

AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA

Personal Author(s):

Report Date:

1971-11-01

Pagination or Media Count:

174.0

Abstract:

UH-1N subsystems tests were flown with three Category II test helicopters. The aircraft was found capable of performing its mission adequately. The airframe, fuselage compartment, flight controls and electric utility system were found to be generally acceptable. Mechanical tail rotor pitch control problems and crew reach difficulties with seat armor installed were notable exceptions. The rescue hoist and cargo suspension unit operated satisfactorily. The loudspeaker system kit proved largely ineffective even after correction of circuitry problems. Early VHF-AM and UHF communications shortcomings were effectively corrected by a TCTO. The ANARC-102 receiver- transmitter became inoperative and did not become operational in time for completion of tests. Most other avionics equipment, including navigation aids, proved satisfactory although specifications for such equipment often were not met. Reliability and maintainability figures for onboard systems were determined. The powerplant, transmission, electrical power, flight instruments, VHF-AM transceiver, tacan and UHF-DG systems were identified as reliability problem areas. Engine access was difficult and time consuming and changes to engine cowling and baffle fasteners were recommended.

Subject Categories:

  • Helicopters

Distribution Statement:

APPROVED FOR PUBLIC RELEASE