The roll out is explained in the Spektrum manual. Here is a link with some info on it too.
http://monster.traxxas.com/showthread.php?t=499627
Rtalyor what kind of ideas are you looking for?
ORIGINAL: sleeper341
so in theory, if i mount it pointing at a wheel I will get the vehicle Speed in MPH?
I say that because if I point it at the fly wheel or drivetrain, I am only getting the speed that they are spinning at before any gearing is taken in to account. If i point the sensorata wheel then I should get the actual speed of the car.