Accession Number : AD0016562


Title :   ANALYSIS OF A PROGRAMMED THROTTLE POWER CONTROL FOR A TYPICAL PULSE-JET HELICOPTER


Corporate Author : FAIRCHILD ENGINE AND AIRPLANE CORP COSTA MESA CA FAIRCHILD ELECTROTECHNICS DIV


Personal Author(s) : GUTSTADT, L R


Report Date : 15 Jun 1953


Pagination or Media Count : 41


Abstract : An analysis was made of the steady-state characteristics and transient behavior of the XH-26 helicopter with a programmed throttle control during 2 severe maneuvers: a pull-up to hovering from high-speed level flight and a pull-up to hovering from a steady descent. During these severe maneuvers, the rotor speed remained within -15 to +10% of the initial value with no trim control by the pilot, provided the fuel system time lag was 0.5 sec or less. This time lag was considered achievable. The programmed throttle control was concluded to act substantially as a rotor governor in maintaining the rotor speed within prescribed limits and to reduce considerably the pilot's task of coordination between collective pitch and throttle. (See also AD-16561)


Descriptors :   CONTROL , FUEL SYSTEMS , STEADY STATE , THROTTLING , TRANSIENTS , HIGH VELOCITY , COMPUTER PROGRAMMING , RATES , FLIGHT , LIMITATIONS , MANEUVERS , LEVEL FLIGHT , ROTORS , HOVERING , SPEED REGULATORS , DESCENT , TIME LAG THEORY


Distribution Statement : APPROVED FOR PUBLIC RELEASE