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#1
September 18th 08, 05:59 AM
posted to rec.aviation.homebuilt
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Engine vibration with advanced ignition.
Been flying my canard for a few years now - it has a Franklin 6-350
engine and LSE dual ignition. I often noticed a slightly extra engine vibs in the 2500-2700RPM range (maybe its my imagination) and I used to fly it 2400rpm or less. All this time I had the ignition advanced probably an extra 5 degrees to get a little more power. Recently I changed the plugs on it and at same retarded the ignition to standard recommended TDC setting. Now it seems the engine is more uniformly smooth in the whole range. Did two test flights. Can extra advance add to engine vibs? Any A&Ps out there? ----------------------------------------------------------- SQ2000 Canard http://www.abri.com/sq2000 
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