Accession Number : AD0783393

Title :   Flight Test of a Hingeless Flexbeam Rotor System.

Descriptive Note : Final rept.,

Corporate Author : BELL HELICOPTER CO FORT WORTH TEX

Personal Author(s) : Hughes,Charles W. ; Wernicke,Rodney K.

Report Date : JUN 1974

Pagination or Media Count : 214

Abstract : This report presents the results of flight tests of a stiff-in-plane flexbeam hingeless four-bladed main rotor, hereafter referred to as the Model 609. The tests were conducted on a modified UH-1 at gross weights from 10,000 to 14,000 pounds and at level-flight speeds up to 150 knots to evaluate performance, handling qualities, maneuverability, and load levels. The tests also evaluated a focused pylon system designed for isolating rotor vibrations. (Modified author abstract)

Descriptors :   *HELICOPTER ROTORS, LEVEL FLIGHT, FLIGHT MANEUVERS, AERODYNAMIC LOADING, STALLING, STABILITY, FLIGHT TESTING

Subject Categories : Aerodynamics
      Helicopters

Distribution Statement : APPROVED FOR PUBLIC RELEASE