| 摘要 |
A device and method having a rotor head with a rotor input/output shaft, a rotor drive cap, an upper rotor/propeller hub, upper blades and a driver bevel gear; an idler assembly connects the upper rotor/propeller hub to a lower rotor/propeller hub, lower blades and an idler bevel gear; and a static assembly with a main rotor shaft, an idler pinion carrier and an idler pinion shaft. The rotor head and the idler assembly rotate utilizing bevel gear idlers in opposite directions about the static assembly to cause the upper blades and lower blades to rotate in opposite directions.
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