Wind tunnel tests were made on full-scale models of the X-RAE 1 and X-RAE 2 unmanned aircraft (UMA) over a Reynolds number range from 500,000 to 1.2 million. The results show that substantial increases in lifting capability could be achieved by choosing a wing section (Wortmann FX63-137) more appropriate to the range of Reynolds number associated with the required airspeed range from 20 to 50 m/sec. The UMA stalls from the root trailing-edge so the 1 deg washout provided appears to be unnecessary. The UMAs have adequate stability margins and both have powerful nose-down moments at the stall. Lift/drag ratio increases as the Reynolds number is raised.
Aerodynamics of Unmanned Aircraft at Full-Scale in the RAE 24FT Wind-Tunnel
1986
32 pages
Report
No indication
English
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