Vertical/short Takeoff and Landing (v/stol) Stability and Control in Ground Effect

Period of Performance: 05/09/1990 - 05/09/1992

$433K

Phase 2 SBIR

Recipient Firm

KSA Technology
5689 Plum Orchard Dr
Columbus, OH 43213
Principal Investigator

Research Topics

Abstract

PHASE I RESULTS HAVE SHOWN SEVERAL AREAS OF V/STOL METHODOLOGY WHICH CAN BE SIGNIFICANTLY IMPROVED BY ADDITIONAL EFFORTS. PHASE I RESULTED IN SOME IMPROVEMENT TO THE METHODOLOGY BUT INDICATED THAT SIGNIFICANT IMPROVEMENTS IN THE ESTIMATION OF FOUNTAIN AND SUCKDOWN INCREMENTS DUE TO MULTIPLE JETS CAN BE MADE. IN ADDITION, THE GROUND VORTEX CREATED BY JETS IMPINGING ON THE GROUND CREATE A GROUND VORTEX WHICH HAS BEEN SHOWN TO BE AFFECTED BY THE TEST TECHNIQUE. THESE AND OTHER EFFECTS IMPOSED BY THE GROUND PROXIMITY NEED TO BE BETTER DEFINED. THE DATA BASE TO DEVELOP THE METHODS IS DEFICIENT. A PROGRAM TO IMPROVE THE DATA BASE, ANALYZE THE DATA, AND DEVELOP THE IMPROVED METHODS IS PROPOSED. THE PROGRAM REQUIRES MODEL TESTING BOTH STATIC AND IN THE WIND TUNNEL. THE CONFIGURATIONS TESTED WILL COVER A RANGE OF VARIABLES SO THAT THE IMPROVED METHODOLOGY WILL BE APPLICABLE FOR A WIDE RANGE OF V/STOL CONFIGURATIONS.