Accession Number : AD0651134

Title :   A HELICOPTER STRUCTURAL FLIGHT LOADS RECORDING PROGRAM.

Descriptive Note : Technical rept.,

Corporate Author : TECHNOLOGY INC DAYTON OHIO

Personal Author(s) : Giessler,F. Joseph ; Braun,Joseph F.

Report Date : DEC 1966

Pagination or Media Count : 202

Abstract : A flight loads program was conducted on a Sikorsky S61N transport helicopter. The following parameters were measured: airspeed, altitude, longitudinal cyclic stick position, collective stick position, two engine torques, normal acceleration at c.g., yaw angular rate, pitch angular rate, and RPM. The rate of climb, thrust coefficient, and tip speed ratio were calculated from the measured parameters. The data were grouped into flight segments of takeoff and ascent, cruise, descent, flare and landing, and hover. The data were sorted by parameter ranges and are presented as bivariate and trivariate tables showing the time spent in each data range. Histograms present some of the more significant aspects of the data, and exceedance and probability curves depict the vertical load factor and the pitch and yaw rates. (Author)

Descriptors :   (*HELICOPTERS, FLIGHT TESTING), AERODYNAMIC LOADING, FLIGHT, GUST LOADS, PERFORMANCE(ENGINEERING), TABLES(DATA), MOTION, ACCELERATION, TRANSPORT AIRCRAFT

Subject Categories : Aerodynamics
      Helicopters
      Transport Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE