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Old 03-18-2020, 05:36 PM   #18 (permalink)
aerohead
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further extension

Quote:
Originally Posted by Dizono View Post
We've thought about that, but a computional fluid dynamics model suggests that a further extension has only minimal gains. So Wunibald Kamm was right





It also shows that further improvements mainly come from the front and the transistion from windscreen to roof. That last one might be a tricky one, but the right shape of 'wind screen wiper shield' might help to shape the flow in such a way that it creates a more efficient flow over the car.
Kamm's best car,the K-5,at Cd 0.23,had an aft-body length equal to 1.63-X the actual body height (no ground clearance included).He did recommend an inflatable boat-tail stinger which would extend the aft-body out to 2.03- X,chopped off like all 'K' forms,which would deliver Cd 0.1909.Extending the tail all the way to its termination point,at 2.72-X yielded Cd 0.1742.
Sure do like what you're doing.
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