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snow tail
They're all fun to look at,and I suspect that many would generate some interesting drag coefficients.
Ice has been used in a wind tunnel in an attempt to let the moving air sculpt it into a low drag form,but there were erosion problems.
If you tried to use snow in a tunnel,the leading edges of the drive fan would have to be remote,and protected from anything but air touching them.
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Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
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