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Old 02-06-2008, 11:03 AM   #4 (permalink)
trebuchet03
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Join Date: Dec 2007
Location: Bay Area
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The Miata - '01 Mazda MX-5 Miata
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^^ I've seen oil used too

the only problem with water, oil, etc. is that it's surface tension interferes... This makes it good for looking at bulk flow - but not so much for sporadic flow interference. Keep in mind, there is no easy method in real world testing (other than tunnel and smoke) that won't interfere
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