Accession Number : AD0850265

Title :   Reducing Takeoff and Landing Distances by Using the Airlift Effect on the Wings,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s) : Kocka, Vilem

Report Date : 19 JUL 1968

Pagination or Media Count : 14

Abstract : A survey of the use of the air-lift effect on foreign aircraft, and results of Czech studies on the subject are presented. The air-lift effect is considered especially appropriate for aircraft with jet or by-pass jet engines, where the ratio of motor thrust to aircraft weight is greater than 0.35, and with a relative wing profile width less than 12%. These conditions are found to be best fulfilled in supersonic fighter planes where the relative wing profile width is less than 4%. So far the air-lift effect has been used mainly in military planes in which air is extracted from the jet propulsion engine; now there is a tendency to apply the air-lift for aerodynamic boundary layer and flow control. (Author)

Descriptors :   (*AIRCRAFT LANDINGS, RANGE(DISTANCE)), (*TAKEOFF, RANGE(DISTANCE)), BOUNDARY LAYER CONTROL, AERODYNAMIC CONTROL SURFACES, REDUCTION, LIFT, JET ENGINES, SUPERSONIC AIRCRAFT, CZECHOSLOVAKIA, SWEPTBACK WINGS.

Subject Categories : Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE