OK, it can be done. Set up a math channel called Speed in the modify pulldown. Allow the software to use the channel as a speed reference by checking the appropriate boxes.
I did mine by taking the engine speed and dividing it by a constant (220 was my guess). I then messed around with the constant until I got approximately the right length for the track and so knew the speeds were about right (ended up at 230). Remember that if you change rear sprocket you'll need to correct for that to get the right speed. If you write a user channel called gear ratio and use it to modify the constant you'll be able to compare distance graphs with different gear ratios. Obviously you need to write a specific Math Channel for each test that way, but it means you can overlay data from sessions with different ratios and have the speeds match.
Liam
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