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Dynamics of tilting proprotor aircraft in cruise flight
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In this article, a nine degree-of-freedom theoretical model is developed for investigations of the dynamics of a proprotor operating in high inflow axial flight on a cantilever wing.Abstract:
A nine degree-of-freedom theoretical model is developed for investigations of the dynamics of a proprotor operating in high inflow axial flight on a cantilever wing. The basic characteristics of the rotor high inflow aerodynamics and the resulting rotor aeroelastic behavior are discussed. The problems of classical whirl flutter, the two-bladed rotor, and the influence of the proprotor on the stability derivatives of the aircraft are treated briefly. The influence of various elements of the theoretical model is discussed, including the modeling used for the blade and wing aerodynamics, and the influence of the rotor lag degree of freedom. The results from tests of two full-scale proprotors - a gimballed, stiff-inplane rotor and a hingeless, soft-inplane rotor - are presented; comparisons with the theoretical results show good correlation.read more
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The History of the XV-15 Tilt Rotor Research Aircraft: From Concept to Flight
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Aeroelastic Response and Stability of Tiltrotors with Elastically-Coupled Composite Rotor Blades
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References
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An Analytical Treatment of Aircraft Propeller Precession Instability
Wilmer H. Reed,Samuel R. Bland +1 more
TL;DR: In this paper, an analytical investigation is made of a precession-type instability which can occur in a flexibly supported aircraft-engine-propeller combination, by means of an idealized mathematical model which is comprised of a rigid power-plant system flexibly mounted in pitch and yaw to a fixed backup structure.
Journal ArticleDOI
The stopped-rotor variant of the proprotor VTOL aircraft
J. A. DeTore,T. M. Gaffey +1 more
A Flight Study of the Dynamic Stability of a Tilting-Rotor Convertiplane
TL;DR: In this article, a flight investigation was conducted to determine the effect of blade flapping on the stability and control of the XV-3 convertiplane in cruise and high speed flight.
Journal ArticleDOI