Quote:
Originally Posted by aerohead
addSome 'angles' at the back of cars can produce what Hucho calls 'bi-stable flow',where the separation line will dance around.
A 'flap' can trigger positive separation (Chrysler calls it 'burst'),fixing a constant coefficient of drag.
I suspect that during development work within the new aero-acoustic wind tunnels,that they were picking up cyclic 'booming' behind the original stylists design,and the flap is a cheap fix for bad aerodynamic design.
Kamm/Fachsenfeld studied these flaps in the late 1930s.
What's old is new again!
Here is the 1930s 'flap'
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I wonder if that wil be a good idea to see just how much these 'flaps' will work? to do just one side of a car and see if you can pic up any difference in the cars handling or if it is pulling to a side?