Readings were furnished, I have to get an engine and do some serious testing on my Phaeton 90 bipe...I don't have a lot of information, the rpm was most likely checked without a muffler...Prop was a Bolly...For $179 you will have to get your own muffler, there are good ones available for $40 or less...
Just wanted to get an idea of what the demand would be before going overboard with production....