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Originally Posted by freebeard
[citation needed]
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It has to be on the forum ... somewhere
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This contradicts Morelli.
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Did he even use (semi-)circular shapes aft ?
I know there have been experiments to try and get air to stick on circular and/or "faster than template" tapering sides - even by trying to suck it down - but was that Morelli ?
Anyways, (semi-)circles or spheres don't really work aft.
Undimpled golfball effect.
You can even create lift by spinning a horizontal cylinder, the Magnus effect. Or by making the air flow over it ,as Coanda did.
Anyways, you get a force perpendicular to the circular surface, and depending on air speed over it.
In real life you're never straight into the wind, so there's always a resultant sideways force.