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Old 06-18-2021, 11:51 AM   #21 (permalink)
aerohead
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10-mph from 7-mph

Quote:
Originally Posted by ennored View Post
That's how I understand it. Traveling at say, 10 MPH, with a 7 MPH tailwind, you have 10 MPH of groundspeed to overcome a 3 MPH headwind.
1) if the 'phenomena' of Rick Cavallero are of aerodynamic origin, then they are governed by the same principles as all aerodynamic phenomena.
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If tested in a laboratory, I believe that you will find that:
A) the vehicle ground velocity never exceeded the wind speed.
B) at sub-critical Reynolds number, laminar boundary layer, all flow across the vehicle was separated.
C) the 'tattle' at the vehicle's nose was being pulled backwards into the low-pressure turbulent wake of the separated flow.
D) the backwards-facing tattle gave the 'appearance' of headwind, when in fact, that never existed.
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Believing that a 'headwind' actually existed, Rick Cavallero's mind made the leap, concluding that he'd done the impossible, re-writing fluid mechanics and thermodynamics.
' Man believes what he wants to believe.'
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If anyone wants to spend a little time studying Sir Issac Newton's second law, pertaining to force/ mass/ velocity/ time/ momentum/ inertia/ impulse, you'll see that this theory of Cavallero's was dead before it was ever mentioned.

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