BTWI've started a thread on the care and feeding of this engine. It is on the first page of the Pattern forum. And there is an awful lot of info in that thread

The sound signature is different than anything else flying today. It isn't so much an exhaust and prop sound but rather an intake reed valve slap. It probably passes the sound requirement as is (we do have some test results that show that). But I believe we can quiet it down further with a little refinement. We'll see what develops. I'll learn alot more soon as I get my new design flying, since it has a fully enclosed pipe and the intake will be taken from the fuselage

We had 20mph+ wind Saturday and the 10 1/2 lb Temptress had no problem whatsoever cutting through that wind. It seemed to me that many electrics at this meet struggled in the wind...on the other hand Temptress is not one of the current crop of pachyderm airplanes designed for drag. It's an 8 year old design that's about 6" wide and only 12" or so deep. Wing is large at about 1050 sq inches but is thinner than most and is designed much differently than most, so it penetrates. Nevertheless, the SAP 180 in a fat fuse would still perform better than most.

I am sold on this engine so much so that I am selling all my glow stuff and buying SAP180's. I am having a Webra and Mintor sale. Anyone interested, PM me. No reasonable offer refused