"Craig Funston" wrote in message
om...
Yikes, my head hurts!
snip

Dynamic pressure is the pressure due to velocity and it varies by the
square of the velocity (ie twice the velocity = four times the
pressure). The ASI measures the difference between the dynamic
(pitot) pressure and the static pressure to give velocity.


No. The ASI measures the dynamic pressure as the difference between the
total pressure and the static pressure. The pitot measures total pressure.