Chuck - I hope you didn't feel like we were attacking your statements. I for one was dumbfounded the first time I had tach'ed my engine.

I ran it for 8 years before I ever bought a tach. I was wondering why I couldn't get as much power from my new Magnum. When the Magnum tach'ed at 15,500, I turned to the ASP for comparison... Imagine my surprise. I then checked my friend's, and it read 15,200. He doesn't own a tach, so I waited till I could borrow one to validate my #'s. 4 different days, 2 different tachs, 2 different props (both MA 10X6), always peaked around 22,000.

I can understand the hesitance to believe my readings, but my own disbelief has caused me to verify them a few times. I don't mention the RPM's often because it always results in discussions like this where the naysayers say it can't be. I just live with the fact that it runs great, and "don't look a gift horse in the mouth".

If you're ever in Winnipeg, let me know and I'll let you measure it with your own tach.

BTW - any physicist will tell you there is no such thing as centrifugal force. What you're refering to is inertia applied to an object kept on an angular path by centrepital force.