Quote:
Originally Posted by Hasbro
So, understanding that there are a lot of other factors that come into play, if the top slope in pic is 19 deg. and bottom of red area is 4 deg, is this in the ballpark?
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From Mair's boattail research,you could conceivably go as steep as 22-degrees.But if you do not slowly transition into that angle,you'll lose the flow to separation.Check out his graphic from Hucho's book .We posted it recently,it's in the Phil Knox's aerodynamics photo archive.