Additional Studies of the Stability and Controllability of an Unswept-wing Vertically Rising Airplane Model in Hovering Flight Including Studies of Various Tethered Landing Techniques

This paper is the third of a series presenting the results of an investigation that is being made to determine the stability and control characteristics of a flying model of an unswept-wing vertically rlslng a i rplane.This model is essentially a conventional airplane model with a l a rge dual-rotating propeller and sufficient power to take off and land vertically and with conventional controls operating in the propeller slipstream.The part of the investigation covered by this paper consisted of flight tests to determine the effects of some miscellaneous factors on the stability and control characteristics for the hovering condition and to determine the behavior of the model in landings made by various techniques involving the use of lines for pulling the model in for a landing.