PPRuNe Forums - View Single Post - What causes "blowback/flapback" when accelerating through transverse flow effect?
Old 14th August 2022 | 17:29
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ShyTorque

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From: Wandering the FIR and cyberspace often at highly unsociable times
Originally Posted by SASless
When we compare rotor system designs....particularly the BO-105/117 series with the rigid rotor system which has been quite successful, against say a fully articulated rotor system.....would the rigid rotor come closer to reacting like a gyroscope than the articulated head?

Is the Rigid Rotor more stable aerodynamically?

My experience in the "Vomit Comet" (un-sas'ed BK) I have to wonder.
So called “rigid” rotors still work by flying the rotor blades to their required positions, rather than by gyroscopic precession.

The “rigid” description is in that there are no specific hinges on the head, ie there are no leading/lagging, flapping or pitch change hinges. The blade support system is all one piece, which can twist/bend to allow relative blade movement and pitch changes. The Lynx type of head was/is semi rigid in that it does have conventional pitch change hinges.
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