Tilt-rotor folding/feathering props.
I've seen a few ideas for Tilt-rotors that involve the idea of using
the props up to about 300 MPH, and then feathering them and folding
them back against the body of the engine, converting ti to a pure
turbofan.
Is this just speculation, or has there been any real work done on
this, and if so, could someone please post a link?
Thanks!
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