Accession Number : ADA296925

Title :   Evaluation of Sample Helicopter Tail Rotor Pitch Link Beaarings by Dynamic Testing Using Simulated Load/Motion Conditions,

Corporate Author : FRANKLIN RESEARCH CENTER NORRISTOWN PA

Personal Author(s) : Vauca, G.

PDF Url : ADA296925

Report Date : 03 DEC 1992

Pagination or Media Count : 50

Abstract : This report describes the testing performed on helicopter rotor pitch link bearings. The purpose of the testing was to evalua;te a new liner material situated between the ball and race of each bearing. The bearing material would be expected to endure a severe simultaneous cyclic loading and oscillatory motion, as is experienced in bearings of present day helicopters when they are maneuvered. Twenty-two bearings were submitted for test by the Naval Air Development Center (NADC) under Contract N62269-90-C-0247. A total of 9600 hours of bearing testing was scheduled for 12 of the 22 bearings. In the event of premature failures, the other 10 bearings were to be used. Six of the 12 bearings would be subjected to a Type I testing and the other six to a Type II testing program. The difference between the Type I and Type II testing was the level of load applied to the bearings and the angle of motion through which the bearings were oscillated.

Descriptors :   *BEARINGS, *TAIL HELICOPTER ROTORS, TEST AND EVALUATION, SIMULATION, ANGLES, MATERIALS, LOADS(FORCES), MOTION, CYCLES, LININGS, HELICOPTERS, SYNCHRONISM, OSCILLATION, DYNAMIC TESTS.

Subject Categories : Machinery and Tools
      Jet and Gas Turbine Engines
      Helicopters

Distribution Statement : APPROVED FOR PUBLIC RELEASE