A note on the dynamic stability of aircraft at high-subsonic speeds when considering unsteady flow

dc.contributor.author	W. J. G. Pinsker	en_US
dc.date.accessioned	2014-10-21T15:53:28Z
dc.date.available	2014-10-21T15:53:28Z
dc.date.issued	1950	en_US
dc.identifier.other	ARC/R&M-2904	en_US
dc.identifier.uri	https://reports.aerade.cranfield.ac.uk/handle/1826.2/3464
dc.description.abstract	The effect of an increase in speed relative to the speed of sound on the unsteady flow round a harmonically oscillating aerofoil, is to increase the lag of the aerodynamic forces and moments behind the deflection when the frequency is small. It is shown theoretically that this will result in a serious deterioration of the damping of both the lateral oscillation and the high frequency longitudinal oscillation with high Mach numbers. Use is made of derivatives calculated for flutter purposes to estimate the unsteady derivatives at aircraft oscillation frequencies. Illustrative examples are presented.	en_US
dc.relation.ispartofseries	Aeronautical Research Council Reports & Memoranda	en_US
dc.title	A note on the dynamic stability of aircraft at high-subsonic speeds when considering unsteady flow	en_US