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Mike G Mike G is offline

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Showing Visitor Messages 1 to 3 of 3
  1. gyrogreg
    12-03-2013 05:24 AM
    Mike, I didn't want to run out of room on my last message: Sources of 2-p-r shake are:
    friction in teeter bearing, axial play in teeter bearing or pitch pivot, looseness or resonance in cyclic control linkage. Teeter bolt should not be tightened like you would another gyro - it has combo bearings (thrust and axial) to eliminate axial play source of 2-p-r shake - that could be damaged if tightened too tight. First thing to do is be sure you are seeing 2-pr or 1-p-r shake - sometimes not apparent, but can be ID'd easy. If I can help, email - Greg
  2. gyrogreg
    12-03-2013 05:17 AM
    Hi Mike,

    I don't respond on the forum any more - too much time and stress. But, I noticed your thread on 2-per-rev shake. I also noticed Chuck's comment about shake of your MAGNI rotor. I didn't see where you were talking about a Magni. Which Magni are you talking about? Magni rotors should ahve no shake - and 2-per rev shake is particularly abscent in Magni rotors. If it helps, see my article:
    Email me at if I can help you resolve your problem. 2-per-rev shake has specific sources, and I would want to help resolve any rotor shake issues you might have that should be corrected.
  3. Bob Gregory
    06-27-2011 08:51 AM
    Bob Gregory
    I may have something you can use for the CG of the rotor.
    I will send it personal email. Send your email address.
    Bob Gregory

About Me

  • About Mike G
    Total Flight Time
    550FW + 500 gyro
    Owned Magni M16 now ELA 07
    Engineer with Oil company specialist in large machines, compressors turbines etc.
    Now interested in rotor/prop balance and vibration.
    Real Name
    Mike Goodrich
    Lillebonne France
    PPL (expired)+ ULM autogyro
    Engineer (retired)
    Primary Airport


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  • Last Activity: 02-15-2017 09:01 AM
  • Join Date: 06-16-2005


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