Accession Number : AD0697822

Title :   PROBLEM OF THE UNSTEADY MOTION OF A WING AT VARIABLE DISTANCES FROM A GROUND-PLANE SURFACE.

Descriptive Note : R. E. Gibson Library bulletin translation series,

Corporate Author : JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Personal Author(s) : Panchenkov,A. N.

Report Date : 18 SEP 1969

Pagination or Media Count : 20

Abstract : An examination is made of the problem of determining the motion of a wing flying at variable distances from a ground-plane surface. Considered in succession are the two-and three-dimensional problems for a wing near such a surface in an ideal incompressible fluid at a given horizontal velocity and for a certain vertical velocity in a spatially fixed coordinate system and, as well, for a coordinate system linked to the wing. It is concluded that the ground has a considerable effect on the unsteady characteristics of the wing during takeoff and landing, resulting in an appreciable variation of the lift and of the stability characteristics. (Author)

Descriptors :   (*GROUND EFFECT MACHINES, AERODYNAMIC CHARACTERISTICS), (*WINGS, *GROUND EFFECT), STABILITY, MOTION, SURFACES, INTEGRAL EQUATIONS, INCOMPRESSIBLE FLOW, TAKEOFF, AIRCRAFT LANDINGS, LIFT, USSR

Subject Categories : Aerodynamics
      Surface Effect Vehicles & Amphibious Vehicles
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE