I found this again morning and thought it might come in handy for some. The math came out of a Toro manual about 15 years ago. I used it quite a bit on golf courses to get the mowing speed between different machines the same to get the same quality of cut out of them. Pretty simple just mark out 100' and use a stopwatch. Make sure you have enough room to get up to travel speed before crossing the start line. The chart can also be used for walking or running speed.100 Feet at
1 MPH Takes 68.18 Seconds
If you divide 68.181818 by the time (in seconds) it takes to travel 100 feet it will give you speed in MPH
Edited by GTTinkerer, December 10, 2012 - 02:16 PM.