Computing MPH

[Steve.Flanagan at VerizonWireless.com]

I was at the track this weekend and pitted next to Victor Cagnazzi (#10 on
the Pro-Stock Truck circuit).  Look for him in Indy this weekend, Great guy,
gave us some clutch tuning tips and other.

He is using the RacePac data logger and it has a channel that shows MPH.
This is not based off the Drive Shaft or other but it uses the G sensor.

I have a data logger that shows G's but does not compute MPH.  

How would I go about figuring out MPH relative to G's?  

I know how to compute relative to Drive Shaft.  This is not what I am
asking.

What is the mathematics involved.  And does the Sampling rate of the G
sensor make a difference or are we just concerned about the average G's and
the time?

Thanks

Steve F


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