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Doug Riley
Doug Riley
Platinum Member
Last Activity: Yesterday, 06:43 AM
Joined: 01-11-2004
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  • Doug Riley
    replied to Trailer questions
    Rather than risk damaging a rather life-critical (and expensive) part of your gyro, I suggest you focus on making blade installation and removal super-easy.

    A big-gyro rotor is heavy and awkward. I've seen more than one RAF trailer rigged with a little crane (with block and tackle) on...
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  • The pattern with accidents of this sort seems to have been that the pilot became just a little bolder each time he flew. He got away with milder versions of something like the maneuver in the video, so he did it more aggressively next time. The presence of spectators often inspires this kind of "courage."...
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  • Doug Riley
    replied to Strange rotorhead
    Yup, the offset gimbal head does just that. My old lowrider Air Command was pretty unstable in turbulence, if you held the stick normally. It'd nose down in a downdraft and up in an updraft, thanks to the high thrustline and no HS.

    If you "floated" the stick gently enough,...
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  • Doug Riley
    replied to Strange rotorhead
    Chuck, I believe that the spindle head is stable with respect to airspeed (assuming continuous one G) but unstable with respect to disk angle of attack.

    The airspeed stability, such as it is, isn't attributable to the spindle design, but arises from the effects of flapping/blowback. ...
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  • Doug Riley
    replied to Strange rotorhead
    Chuck, the idea of eliminating the nose-up bias caused by the geometry of the Bensen spindle head is interesting. Bill Piper out West followed a similar idea when he designed the spindle head for his sheet-metal gyro.

    Apparently, the weight of an overhead stick was about right to eliminate...
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  • In addition to keeping the blades from striking something when they flap on the ground, the teeter stops also help to limit excessively large/fast control inputs in flight. Therefore, the 18 deg. teeter range should be preserved....
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