Summary
It is called attention to the danger for airplanes resulting from the behaviour of the rudder efficiency at overcritical Mach numbers. Windtunnel tests show that in many cases at transsonic Mach numbers a sharp decrease of the rudder efficiency is possible. Author shows that as a consequence of this behaviour under certain conditions forces may be produced which are ample to destroy the aircraft.
Bibliography
O. Knappe,Schnellkanalversuche an einem symmetrischen Klappenflügel, Jb. dtsch. Luftfahrtforsch.1, 96 (1941).
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Altenrhein, E.G. Über eine Gefahr, die durch Ruderausschläge bei schallnahen Geschwindigkeiten entstehen kann. Journal of Applied Mathematics and Physics (ZAMP) 4, 219–221 (1953). https://doi.org/10.1007/BF02083518
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DOI: https://doi.org/10.1007/BF02083518