Rcpilet, why do you wish to bash our adverstising? The numbers posted by us were for APC props and the numbers posted by hubbajer were for Master Airscrew. They will not be the same rpm anywhere on the planet just as no two tachs, or engines will be. We have been testing a high compression version that is turning the APC 13x6 at 13,000 rpm but must be run on 100 plus octane. You are welcome to come to our shop with your video camera and check the rpm of any engine in stock. All we ask is you post what you see just as we have. As a manufacturer the last thing we want is for a customer to call and say his engine isnt doing what we said it would. Our figures are for broken-in engines tuned for peak rpm. It just doesnt make sense for us to make false claims.

Keith
BME