Cold-Weather Flight Tests of an OH-58 Helicopter Equipped with an Elastomeric-Bearing Main Rotor
BELL HELICOPTER TEXTRON INC FORT WORTH TX
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The results of a flight test program conducted to investigate the characteristics of a main helicopter rotor equipped with elastomeric bearings operating at low temperatures are reported. The helicopter used was an OH-58A, and the main rotor tested had elastomeric bearings in the pitch-change and flapping axes. Operation at temperatures of 48, 5, -9, -13, -29, and -52 F was investigated. Normal rotor control was obtained down to temperatures of -13 F. At lower temperatures, elastomer stiffening caused increased control system loads, which limit operation.