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  1. WILLWILDY

    I need your opinion on a counter rotating design.

    I am working on a counter rotating helicopter design where the engine sits between the top and bottom rotor. The bottom rotor has a 5.25 inch chord and a 10 foot span, and is mounted on a turntable. The engine is mounted to the rotor at the axis. The top rotor has a 3.4 inch chord and a 3 foot...

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