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Thread: Auto Pilot tips

  1. #11
    Senior Member Av8r_Sed's Avatar
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    Feb 2010
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    10C Greenwood, IL
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    671

    Default Re: Auto Pilot tips

    I would have the servo tested. It's conceivable that after 10 years the feedback potentiometer is starting to show its age.
    -- Paul S
    Model III SN910
    582 IVO Med

  2. #12
    Senior Member PapuaPilot's Avatar
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    Nov 2013
    Location
    Nampa, Idaho
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    1,225

    Default Re: Auto Pilot tips

    Also any slop or tightness in the control system could cause problems. Is everything smooth and properly lubricated?
    Phil Nelson
    A&P-IA, Maintenance Instructor
    KF 5 Outback, Cont. IO-240
    Flying since 2016

  3. #13
    Senior Member
    Join Date
    Oct 2016
    Location
    Western Australian
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    218

    Default Re: Auto Pilot tips

    Check the grub screw hasn't come loose on the servo arm. There was a similar thread on the MGL forum and one guy found the grub screw had come loose. He hasn't reported back (yet) whether that solved the problem but it's an easy thing to check at least.

  4. #14
    Senior Member efwd's Avatar
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    Jun 2015
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    Yorba Linda, CA
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    2,817

    Default Re: Auto Pilot tips

    Oohh thaaaattss' what those are called. Makes sense I suppose. Thx for the vocabulary lesson.
    Eddie Forward
    Flying
    SS7, 912iS, Garmin G3X

  5. #15
    Senior Member fastfred's Avatar
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    Nov 2016
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    herkimer,ny
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    217

    Default Re: Auto Pilot tips

    The control system looks like new and I lube it frequently. Without the auto pilot it flies beautifully hands off straight and level but when you switch on AP it begins to slowly weave back and forth. Dynon told me to turn the sensitivity back up to 40. I went to 15 and the weaving became radically uncontrollable. It had been on 20 for ever and I have many hours on it working fine and now I have to run it on 4 to make it work. What happens when I get to #0? Dynon sent me permission to send it in to be checked out but I hate to be down for a month
    The odd thing is it started do it after an up date?

  6. #16
    Sink Rate's Avatar
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    Aug 2017
    Location
    Boulder, CO
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    15

    Default Re: Auto Pilot tips

    Perhaps a bit off-topic - my apologies! Dynon users: What size servo do you use for a model 7? I red from @Dorsal that he used the SV32 but then was tempted to upgrade the pitch servo to SV42, while keeping the roll an SV32. Is that what the Dynon folks here are using?

    p.S. My first post

  7. #17

    Default Re: Auto Pilot tips

    I installed the SV32 long.
    Joe Gallagher
    Flying 7SS

    http://frontierfox.home.blog

  8. #18

    Join Date
    May 2016
    Location
    Lindsay, TX
    Posts
    40

    Default Re: Auto Pilot tips

    I would ask the folks at Kitfox. I asked them before ordering, and I was advised to use an SV52 for pitch.
    I don’t recall which one they recommend for pitch (SV32 I think). Sorry I can’t find the email, and my build log isn’t handy.

    John

  9. #19
    Sink Rate's Avatar
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    Aug 2017
    Location
    Boulder, CO
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    15

    Default Re: Auto Pilot tips

    Thanks for the replies! I pinged Kitfoxaircraft to see if there are any recommendations for pitch and roll torque.
    Happy Holidays to y'all!

  10. #20

    Join Date
    Jun 2018
    Location
    San Diego, CA
    Posts
    75

    Default Re: Auto Pilot tips

    I'm curious as well. Please let us know what they say.

    Mike
    Mike
    Building the JaMFox N677JM
    Kitfox 5 Vixen
    KRNM

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