Accession Number:

AD0673147

Title:

INVESTIGATION OF THE LATERAL/DIRECTIONAL STABILITY CHARACTERISTICS OF A FOUR-PROPELLER TILT-WING VTOL MODEL

Descriptive Note:

Final research rept.

Corporate Author:

PRINCETON UNIV NJ DEPT OF AEROSPACE AND MECHANICAL SCIENCES

Report Date:

1968-04-01

Pagination or Media Count:

108.0

Abstract:

Results of an experimental investigation to determine the lateral directional stability characteristics of a four-propeller tilt-wing VTOL aircraft using a one-tenth scale dynamically similar model are presented. Test conditions include wing incidences of 89, 70, and 30 deg. Measurements of the transient motion of the model in the lateraldirectional degrees of freedom and the static lateraldirectional stability derivatives were made. The transient and steady-state data are analyzed assuming that the motions of the vehicle may be described by linearized equations, and the resulting static and dynamic derivatives are presented. The characteristics of the lateraldirectional dynamic motion of the full-scale vehicle as predicted by the tests of the dynamically similar model are determined and discussed. All data are presented for a center-of-gravity position of 9-percent MAC, which is ahead of the most forward C.G. position of the aircraft 15-percent MAC, and the horizontal tail and flap programs differ from those presently used on the aircraft.

Subject Categories:

  • Transport Aircraft
  • VSTOL
  • Research and Experimental Aircraft
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE