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I am curious about the reading of 500 pascals at the front of the car as this is greater than the stagnation pressure at 80 km/h.
velocity (m/s) = velocity (km/h) / 3.6 = 80 / 3.6 = 22.222 m/s
air density at 10 C is 1.246 kg/m3 for std pressure
Stagnation Pressure (Pa) = 0.5 * Density * Velocity ^ 2 = 0.5 * 1.246 * 22.222 ^ 2
" " = 307.6 Pascals
This compares with your measurement of 500 Pascals.
What actually causes the measured pressure to be greater than stagnation pressure?
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