Accession Number:

AD0600498

Title:

WIND-TUNNEL INVESTIGATION OF SINGLE AND TANDEM LOW-ASPECT-RATIO WINGS IN GROUND EFFECT

Descriptive Note:

Technical rept.

Corporate Author:

LOCKHEED-CALIFORNIA CO BURBANK

Report Date:

1964-03-01

Pagination or Media Count:

117.0

Abstract:

The effects of end-plate and camber changes on the aerodynamic characteristics of five basic wings in ground effect were investigated by the image technique, and the effect of gap-chord and aspect ratio was investigated on tandem-wing combinations over a ground board. For a given end-plate structural clearance height, the addition of end plates shows an increase in LD for AR-1 however, better LD is obtained with end plates off for AR-4. For a given wing trailing edge structural clearance height, end plates show considerable improvement in LD. Improved LD is also noted for a small down flap deflection, b contoured end plates, c wedge-bottom end plates, d thin wing, and e high aspect ratio. Static stability improves as the ground is approached and is particularly evident for the tandem-wing combinations. Limited data were obtained in roll and yaw.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE