COUNTER-ROTATING PROPELLER SYSTEM WITH CAPABILITY TO STOP ROTATION OF ONE ROW
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United States of America Patent
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Issued Date -
Sep 19, 2019
app pub date -
Mar 16, 2018
filing date -
Mar 16, 2018
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Abstract
A propeller system has a pair of rotors and a pair of blade sets and at least one a drive input to drive a first of the rotors and blade sets and a second of the rotors and blade sets. The blade sets are positioned such that when both are driven, air will be driven across the first blade set and then across the second blade set. There is a pitch change mechanism to change an angle of incidence of the blade in at least one blade sets. There is a device for selectively stopping rotation of at least one of the first or second rotor and blade set while still allowing rotation of the other rotor and blade set. The pitch change mechanism of the stopped blade set can still change the angle of incidence when the device has stopped rotation. A method is also disclosed.
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