Originally posted by Heraclid
Also, about the 8% off... radar has been known to clock houses at 12 mph. And I don't mean a mobile home. :-)

Not saying it was what happened with the ticket you got, but police radar is notoriously inaccurate, depending on various factors.
Yeah, I know radar has been known to be inaccurate at times, but the number I got from my ticket pretty much went with my own figures... paceing and timeing mile markers. I had already driven about 400-500 miles that day and figured I was off by around 7%-8%. Then after my ticket was issued, I asked the cop to pace me at 65 (the speed limit) and I was reading 59-60mph. Then later in my trip, I had my friends grandfather pace me on the way back up to GA from FL... and his was reading about the same... so, my conclusion is that I'm off about what I figured... 8% give or take.

Grant-
It looks to me like your figuring a percentage error with the diameter, right? You need to do an error calculation with the circumference as this is the actual distance traveled per revolution.

Don't know if I care to adjust mine though. I'll take every bit of extra warranty I can get. I am currently working on a complete auto-pc system that will include GPS so I'll have an accurate number then...

TTYL!

Coach... aka Randy!