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Thread: STI Farm Fox Build Log

  1. #181
    Senior Member Kitfox Pilot's Avatar
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    Default Re: STI Farm Fox Build Log

    Thanks Geek, it helps to keep me building when it helps others. There are days I say what have I got into!
    Harlan and Susan Payne
    Sold Piper Archer
    Flying FarmFox STI Kitfox N61HP
    Rotax 915is, Airmaster prop
    https://www.youtube.com/channel/UC5A...oCVUP15G0uB-Yw

  2. #182
    Senior Member Kitfox Pilot's Avatar
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    Default Re: STI Farm Fox Build Log

    Quote Originally Posted by Shadowrider View Post
    Looking good! Spend lots of time shrinking it good now, or when it gets cold you will have lots of loose spots. Cory spend hours going over every square inch. I did not spend as much time and now have gone back going over it and probably spent more time then he did initially.

    I am going over everything with the final shrink I hope. Looking good but won't know til next winter I guess.
    Harlan and Susan Payne
    Sold Piper Archer
    Flying FarmFox STI Kitfox N61HP
    Rotax 915is, Airmaster prop
    https://www.youtube.com/channel/UC5A...oCVUP15G0uB-Yw

  3. #183
    Senior Member Kitfox Pilot's Avatar
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    Default Garmin question

    I making my can bus wire now and my question is does it matter what order nodes/LRUs are connected on the line at or can I just hook them up in the shortest order as I come to them?
    I can't seem to find this answer online.
    Thanks for any info.
    Harlan and Susan Payne
    Sold Piper Archer
    Flying FarmFox STI Kitfox N61HP
    Rotax 915is, Airmaster prop
    https://www.youtube.com/channel/UC5A...oCVUP15G0uB-Yw

  4. #184
    Senior Member PapuaPilot's Avatar
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    Default Re: STI Farm Fox Build Log

    The order doesn't matter. Just pick the shortest run and make sure the ends are properly wired or have the termination connector.
    Phil Nelson
    A&P-IA, Maintenance Instructor
    KF 5 Outback, Cont. IO-240
    Flying since 2016

  5. #185
    Senior Member Kitfox Pilot's Avatar
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    Default Re: STI Farm Fox Build Log

    Thanks Phil, I didn't think it did but this is all new to me.
    Harlan and Susan Payne
    Sold Piper Archer
    Flying FarmFox STI Kitfox N61HP
    Rotax 915is, Airmaster prop
    https://www.youtube.com/channel/UC5A...oCVUP15G0uB-Yw

  6. #186
    Senior Member Kitfox Pilot's Avatar
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    Default wiring question

    Still trying to learn everything before I do it on this wiring. Does this diagram mean the 28 servos and the 507 share the same power wire and 5 amp service?
    Attached Images Attached Images
    Harlan and Susan Payne
    Sold Piper Archer
    Flying FarmFox STI Kitfox N61HP
    Rotax 915is, Airmaster prop
    https://www.youtube.com/channel/UC5A...oCVUP15G0uB-Yw

  7. #187
    Senior Member 109JB's Avatar
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    Default Re: wiring question

    Yes it does.
    John Brannen
    Morris, IL
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  8. #188
    Senior Member Flybyjim's Avatar
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    Default Re: STI Farm Fox Build Log

    My drawing showed a 5amp breaker also but talking with the folks at Stein Air they recommend if all three are sharing a breaker to use a 7.5

  9. #189
    Senior Member Kitfox Pilot's Avatar
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    Default Re: STI Farm Fox Build Log

    That's interesting, I can see why if you use all the trim options your getting close to that 5 amp load.
    Harlan and Susan Payne
    Sold Piper Archer
    Flying FarmFox STI Kitfox N61HP
    Rotax 915is, Airmaster prop
    https://www.youtube.com/channel/UC5A...oCVUP15G0uB-Yw

  10. #190
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    Default Re: STI Farm Fox Build Log

    Quote Originally Posted by Flybyjim View Post
    My drawing showed a 5amp breaker also but talking with the folks at Stein Air they recommend if all three are sharing a breaker to use a 7.5
    Note too that the Garmin drawing shows 22 gauge wire. Going to a 7.5A breaker exceeds the 5A spec for 22 gauge wire so if you went the 7.5A route, you need to bump the wire up to 20 gauge. BUT.....

    Looking at the loads page of the Garmin manual (page 2-16), the servos are max rated at 1.8A and the 507 is a rip roaring 0.2A so the max pull is 3.8A. Yeah I see the other number of 2.8A per servo but that spec is used when using auto trim and driving the trim motor directly through the servo. You can't do that with the Kitfox trim motor cause it pulls more amps than the servo can supply. You can look at page 27-10 and see the hook up for trim motors that pull more than 1A.

    I understand why Stein would be overly cautious about the breaker (I am actually using Stein for my system and they have been nothing but really great). If someone tried to hook up a high current trim motor and operate it through the servos, then the total current pull to the breaker would be 4.8A (2.8A pitch trim + 1.8A roll (no trim) + 0.2A) and that's too close to the breaker level and the max current rating of the wire. They will error to the side of caution. But in this case I think you are OK with your 5A breaker and 22 gauge wire as long as you don't try to operate the trim motor directly.

    Geek

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