Quote:
Originally Posted by aerohead
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QUESTION :
at what velocity were the Insight measurements obtained? I've been adjusting all your values to 70-mph, as other automotive messengers are reporting figures obtained at 70-mph.
Second question. In other reporting, forward stagnation pressures = to local density altitude / station pressure are indicated, normalized to SAE standard = 101,327-Pascals.
When I adjust the 50-mph and 43-mph data to 70-mph, none the stagnation pressures indicate even a fraction of that.
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I would have thought a qualified engineer would find this all very easy. But let the sociologist / geographer / journalist help you!
550 metres altitude with a sea level pressure of 1013.25mB = 951mB
951mB at (say) 25 degrees C = air density of 1.1 kg/cubic metre
80 km/h (22.2 m/s)
Calculated stagnation pressure = 271 Pa.
Pressures measured on car:
