WIND TUNNEL INVESTIGATION OF A V/STOL TRANSPORT MODEL WITH FOUR POD-MOUNTED LIFT FANS

The investigation included force and moment measurements over a range of angles of attack and sideslip through the transition speed range for several power conditions. The static longitudinal and directional stability characteristics were determined for several configurations, and lift-fan thrust performance was measured. The model had an increase in lift with increasing airspeed and showed lateral and directional stability for all test conditions but longitudinal stability for only the higher test speeds. Flow conditions at the tail for the powered-lift condition were similar to those of conventional airplanes in terms of dynamic pressure and downwash factor, but there was a decidedly adverse sidewash effect. The adverse sidewash was compensated to a considerable extent, however, by the fact that the model was about neutrally stable, rather than unstable, with the vertical tail off.

  • Corporate Authors:

    National Aeronautics and Space Administration

    400 Maryland Avenue, SW
    Washington, DC  USA  20546
  • Authors:
    • Newson Jr, W A
  • Publication Date: 1970-8

Subject/Index Terms

Filing Info

  • Accession Number: 00073153
  • Record Type: Publication
  • Source Agency: FLIGHT TRANSPORTATION LABORATORY, MIT DEPT. OF AERONAUTICS AND ASTRONAUTICS
  • Report/Paper Numbers: TND-5942
  • Files: TRIS
  • Created Date: Sep 5 1974 12:00AM