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Old 03-26-2011, 04:13 PM   #5 (permalink)
aerohead
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wind tunnel

I believe it was Alan Pope who wrote a book,Low Speed Windtunnel Design.You ought to check it out.\
There are some primary criteria which must be honored for a tunnel of any design and the short of the long of it, is that you'd never be able to achieve meaningful results in any tunnel you could do in a garage.
This stuff has been researched to death.You can't cheat in any way and expect results.
Models could end up costing you more than a full-scale build.Ford spent $60,000 for a 3/8th-scale Taurus.
You could do a small tunnel to rough out gross alterations but a homes 200-AMP service would not provide enough electric power for a fan capable of flow velocity and volumes you'd need for drag measurements.
Consider tuft testing.All you're looking for is attached flow and that's easy to ascertain.
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