WIND-TUNNEL INVESTIGATION OF SINGLE AND TANDEM LOW-ASPECT-RATIO WINGS IN GROUND EFFECT
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 L/D for AR-1; however, better L/D is obtained with end plates off for AR-4. For a given wing trailing edge structural clearance height, end plates show considerable improvement in L/D. Improved L/D 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1964
- Accession Number
- AD0600498
Entities
People
- John R. Brown
- Samuel G. Hansen
- William D. Hinshaw
- William E. Sickles
- William P. Stevens
Organizations
- Lockheed Martin