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Doug Riley
Doug Riley
Platinum Member
Last Activity: Today, 07:15 AM
Joined: 01-11-2004
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  • Doug Riley
    replied to HoneybeeG2 ?
    in News
    JW: Sorry to rain on your parade.

    The G2 was not designed according to the criteria that most knowledgeable gyro people now accept. These criteria are (1) the craft have sufficient tail surfaces to prevent torque rolling at low G and (2) the tail surfaces, combined with the alignment of...
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  • Doug Riley
    replied to Rotor blade rpm which is best
    Of course, what's "best" depends on your goals.

    For best efficiency, a mu ratio of 0.35 turned out in the tests of the 1930's to be best. The "mu ratio" is the ratio of the aircraft's forward speed to the blades' tip speed. You'll need to convert back and forth between...
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  • Doug Riley
    replied to Nose wheel
    JBird, it's possible that the gear's pivot might develop enough slop to contribute to shimmy. It seems less likely to me than a lack of friction in the collar, though.

    Flight Express, the friction collar is an aluminum block, with a big hole through which the gear leg passes. The block...
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  • Doug Riley
    replied to Nose wheel
    If by "all over" you mean shimmy, yes, it can happen and can be pretty violent. There's an adjustable friction-damping collar near the top of the nose-dear leg. Tighten it until there's noticeable drag when you swivel the gear with your hands -- but not so much that it won't turn when you...
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  • Doug Riley
    replied to KB2 to 3
    Brent: Glad to see you have a tall tail. The stock KB-3 had issues with torque-over and PPO, which took at least a couple lives. The tall tail addresses both issues.
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  • Doug Riley
    replied to Managing divergence in a Gyroplane
    Vance, you're right, of course. Those of us fossils who learned out of the Bensen manual had to unlearn this notion of jabbing the stick ... because that's precisely what Bensen taught!

    Way back in the day, I took a gyroglider lesson or two with Ron Menzie after re-reading the Bensen manual...
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  • Vance, there are a couple little lags built into the cyclic part of the turning process. First, when the stick is deflected, the rotor takes a few revs to respond. Even after it has responded (precessed to its new orbit), the aircraft's flight path doesn't immediately curve. Instead, the (now) sideways-pulling...
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    Last edited by Doug Riley; 07-27-2017, 09:40 AM.

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