Accession Number : AD0370316

Title :   ESTIMATED STABILITY AND CONTROL CHARACTERISTICS OF Z(XQ-5)ZTARGET DRONE.

Corporate Author : LOCKHEED AIRCRAFT CORP VAN NUYS CALIF

Personal Author(s) : Bowers ,H. M. ; Olson,R. N.

Report Date : 13 MAY 1955

Pagination or Media Count : 30

Abstract : The estimated stability and control characteristics of the XQ-5 Supersonic Target Drone are depicted. This vehicle is of conventional design except for the ramjet engine being mounted on a strut below the fuselage and having the ground penetration spike for a nose section. An all-movable horizontal stabilizer is used for longitudinal control and conventional outboard ailerons are used for lateral control. Since no requirements exist for sideslip maneuvers, no rudder is incorporated in the design. The missile appears to be longitudinally stable throughout the entire design speed range with a minimum static margin of 4% wing mean aerodynamic chord. Ample longitudinal control is available to attain the maximum available steady-state power--limited positive normal load factor throughout the design speed and altitude range. Positive static directional stability is demonstrated throughout the design speed range. Although the missile is found to be unstable in roll due to yaw at supersonic speeds, the condition is easily controllable by the autopilot. Inasmuch as the time to roll 90 deg is of the order of one second or less for altitudes up to 60,000 ft (operational ceiling for the existing ramjet engine), the aileron effectiveness appears to be adequate. (Author)

Descriptors :   (*TARGET DRONES, AIR FORCE RESEARCH), AERODYNAMIC CONFIGURATIONS, FLIGHT CONTROL SYSTEMS (U) (*RAMJET TEST VEHICLES), RAMJET ENGINES, SUPERSONIC FLIGHT, ROLL, YAW, LIFT, DRAG, DRONE CONTROL PLANES, SUBSONIC CHARACTERISTICS, SIDESLIP, DOWNWASH, BOOSTER ROCKETS, HIGH ALTITUDE

Subject Categories : Pilotless Aircraft
      Research and Experimental Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE