Quote:
Originally Posted by steve murray
Hi Jeff,
To be honest, as high power levels I have never heard my airplane external to the cockpit as no one has ever flown my plane but me. I suspect (have not measured) it is lower in decibels compared to other engines external to the cockpit as I have been told it is very quiet in the pattern by others. I agree with you, on the ground it is much quieter at idle vs. takeoff power level. I always use noise canceling headphones. It maybe my calibration point is biased as it has been many years since I have flown behind a Lycoming.
It does seem to quieten up a bit after I get away from the ground. I am also running two Supertrapp mufflers, the only mod I did to the mufflers is to replace the inside fiberglass material with stainless steel wool.
(You are not by chance the person who bought Any Parrish's plane are you?)
Steve
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Ok, other things could make a difference too: interior, prop, headset, etc...
I've not heard mine from the ground either, but several people have commented that it a very distinct sound and they
know when I'm flying around.
I built the plane, bought the engine from Paul K, radiators/cowling from Caleb L, and prop from Dee W.
So, to tie this to the original post, Paul and Caleb have already switched to a lycoming, and Dee is in the process. All 3 are on this forum. (might be some kind of hint there

, but it was not due to failures)