Recent Studies of the Pitch‐Lag Instabilities of Articulated Rotors

Blake, Bruce B.; Burkam, J. E.; Loewy, Robert G.

doi:10.4050/jahs.6.13

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R Prop-rotor "Tvhirl Diue~ge~~ce"1

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1969

2013

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Cited by 4 publications

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“…Further, the total inflow is very large so that, in addilion to the change in total resultant velocity, given by J J sin po.cos $) -+,2(J cos $ -J.J sin &.sin $ ) ] I / ' (12) \vhere J = the propeller advance ratio, and A, = induced velooity ratio, and J. & J cos 00 + At.…”

Section: R Prop-rotor "Tvhirl Diue~ge~~ce"mentioning

confidence: 98%

Review of Rotary-Wing V/STOL Dynamic and Aeroelastic Problems

Loewy¹

1969

j am helicopter soc

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Rotary-wing and propeller instnbilities are reviewed wilh thmc objectives: 1) to increase insight into the sources of pi.op-rotor problems, 2) to catalogue a variety of instabilities to which proprotars arc srtbjcct and 3) to suggest several important sr~hjects for research in this goncrnl won. Thc first ohjectivo is approached by contrasting prop-rotor static ~e~.oelaet.ic pral~lems with those eneonntered vith firedsing aircraft; t,he second hy a selective litornture revien which gn,ups the dynamic phenomena of interest according to (he kind of diNel.entinl equalion which characterizes them; nnd the third attom11t.s to anticipate sources of difficulty either with new configurations or in flight 1.egime.s for which we presently have very limited experience.

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Section: R Prop-rotor "Tvhirl Diue~ge~~ce"mentioning

confidence: 98%