Accession Number : AD0000001


Title :   CANBERRA PR 3 VX 181 (2 X AVON 1). LATERAL AND DIRECTIONAL BEHAVIOUR AND THE EFFECT ON SURVEY PHOTOGRAPHY


Corporate Author : AEROPLANE AND ARMAMENT EXPERIMENTAL ESTABLISHMENT BOSCOMBE DOWN (UNITED KINGDOM)


Personal Author(s) : KEYES, H J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/000001.pdf


Report Date : 21 Oct 1952


Pagination or Media Count : 41


Abstract : The lateral and directional behavior of the Canberra PR 3 VX 181 during survey flights is discussed. Flight trials showed that even under calm air conditions a short-period oscillation in heading and angle of bank existed with both the period (2 to 4 sec.) and the magnitude varying with M no. and altitude. General wanders in heading and bank also appeared to be independent of M no. and, in the case of angle of bank, independent of altitude for the time intervals between successive photographs of the F.49 survey camera fitted with a 6-in. lens. Near M = 0.8, the oscillations and wanders averaged about 1 deg, although maximum values of 2 deg and above were measured under calm air conditions and while the pilot was attempting to maintain the aircraft on a constant heading with the wings level. Lack of sufficient instrumentation prevented a quantitative evaluation of rudder-free flight, but no effect was apparent. The use of a standard Mk 9 autopilot had little effect at 25,000 ft. The autopilot flight characteristics seemed adequate for photographic purposes with a 1 deg permissible camera tilt. Further restriction is expected to require camera stabilization.


Descriptors :   *TEST AND EVALUATION , STABILIZATION , FLIGHT TESTING , TIME INTERVALS , AIRCRAFT , AIR , SHORT RANGE(TIME) , FLIGHT , CAMERAS , AERODYNAMIC CHARACTERISTICS , VALUE , ALTITUDE , OSCILLATION , AUTOMATIC PILOTS , PHOTOGRAPHS


Subject Categories : Patrol and Reconnaissance Aircraft
      Cartography and Aerial Photography


Distribution Statement : APPROVED FOR PUBLIC RELEASE