Coaxial helicopter
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United States of America Patent
Stats
-
May 3, 2005
Grant Date -
Aug 15, 2002
app pub date -
Feb 14, 2001
filing date -
Feb 14, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A coaxial helicopter, comprising a first rotor carried by a first shaft and a second rotor carried by a second shaft; wherein one of the first and second rotors has cyclic pitch control and the other rotor does not have cyclic pitch control, at least pitch and roll control being implemented by cyclic blade pitch control of only one rotor of the coaxial rotor set. Provisions for yaw control can include differential collective control of the first and second rotors, providing yaw paddles and/or a tail rotor, ducted fan, or an air jet configured for yawing the coaxial helicopter.
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