Counter-torque device with rotor and flow-straightening stator, both of which are ducted, and phase modulation of the blades of the rotor, for helicopter
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United States of America Patent
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-
Dec 31, 1996
Grant Date -
N/A
app pub date -
Aug 30, 1994
filing date -
May 4, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A flow-straightener with stationary vanes and aerodynamic profile is mounted downstream of the rotor with blades in the transverse duct passing through the fairing at the tail of the helicopter. The blades of the rotor are distributed angularly about the axis of the rotor with uneven azimuth modulation, such that any angle between two arbitrary blades of the rotor is different from any angle between two arbitrary vanes of the flow-straightener.
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