70mph=70psi. 100mph is around 120psi. It's not linear.


"Gudmundur" wrote in message
...
Looking for 'how many PSI of pressure in the pitot tube equal
how many MPH indicated speed on my speedometer.

I have a very accurate source of air pressure and want to test
my speedometer to get an idea of how well it's in calibration.

TNX folks!