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first picture
Also, the smoke wand is about level with the top of the roof to begin with, and then the smoke 'descends' towards the bonnet before rising again 'level.'
None of the images appear to show at least a 20-mph air velocity, a minimum for critical Reynolds number. Shame!
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Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
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