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Thread: MAP ignition curve

  1. #1

    Join Date
    Aug 2012
    Location
    Caracas - Venezuela
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    2

    MAP ignition curve

    I would like to discus with somebody about the adjustable MAP advance curve for the electronic ignition system. Mine is a double SDS electronic ignition system installed in a O-235-L2C (Rutan 61). I have a fix RPM advance curve that works very well (from 0 to 30 degrees at full RPM) but my doubts are in the MAP variation to adjust the correct curve with altitude. I have worked on some combinations from 8 degrees retard at sea level to a 12 degrees advance at 14000 feet, but I haven't actually tried it and I'm a little reluctant to use it until talk to somebody about it. Anybody?
    Last edited by Lukeman; 06-02-2013 at 05:02 PM.

  2. #2
    Chris In Marshfield's Avatar
    Join Date
    Oct 2011
    Location
    Marshfield, WI
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    122
    Ross Farnham, "the SDS guy", hangs out over at the FlySoob group on Yahoo! forums. He'd be a great guy to ask the question to, and some of us over there with other engines might be able to learn a thing or two from your experience.

    http://groups.yahoo.com/group/FlySoob/

    If someone here doesn't have an answer for you, give it a try.

    ~Chris
    Christopher Owens
    Marshfield, WI
    Bearhawk #991

  3. #3

    Join Date
    Aug 2012
    Location
    Caracas - Venezuela
    Posts
    2
    Thank you Chris!

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