"X"- - - -Unknown quantity used in math calculations.
"Spurt"- - - -a drip of water under pressure.
"Expert"- - - -an unknown drip under pressure. Good luck with that.
Road draft tubes provided negative pressure in the crankcase at speeds above 30 MPH due to the venturi effect of air flowing past the end of the angle-cut tube sticking down into the airstream under the vehicle. It worked 70 years ago, and it still works today.
Jerry
With respect to the open road draft tube, the process would be better (more generally) known as (and described as) the
Bernoulli Principle/Effect?
