Paul,
            Finally a noise!  I think I overdid the rust inhibitor by the blue smoke.
 The next day I actually ran it again without the audience, and find the motor runs
“rough” between 1800 and 2200 rpm.  I suspect it is a rich mixture as the A/F is
reading about 10.5 to 11.5.  The exhaust gas is about 1350 degrees and so far have
not much else to go on.  Waiting for a new chip from tracy which will be a few weeks
in which time I will finish the cowls.  Has anyone experience or advice re the “rough
running” ?  It almost seemed like a backfire or a miss.  Too much to take in at once,
but am leaning to buying tracy’s recorder so I can find what is happening


http://www.youtube.com/watch?v=hSNBFLuZSK4

Neal Unger in the Oz outback

Good work Neal. Sounds real strong. Be careful when you shove the power in  for the
first flight. It will want to head for the fence :) Also keep an eye on that flex plate.

Rough running is common until you get it tuned. Does it sound like gear box chatter?
If so up the idle speed to 2000 or so. That is the 2.85:1 so real prop RPM will only
be 700 RPM at 2000 engine RPM.


Paul Lamar
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