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Old 04-15-2010, 10:07 PM   #2 (permalink)
jime57
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Join Date: Oct 2008
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OurInsight - '06 Honda Insight
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Quote:
Originally Posted by aerohead View Post

Note: The aft-body of the example fuselage is responsible for a 567% drag reduction when added to the point of max camber.

From zero-to-20% chopped-off,the drag rises 3.95%
30%-chop = 12.5% drag increase
40%-chop = 29.6% drag increase
50%- chop = 59.6% drag increase
60%- chop = 99.85% drag increase
70%- chop = 257% drag increase
80%- chop = 330% drag increase
90%- chop = 426% drag increase
So,if I interpret this correctly, the best one can hope far in about 3.95% worse than the ideal template, with a boattail that is probably impossible long and low. RobertSmall's proposal looks to be about a 30-40% chop, if one degrades it a bit for the upward slop of the bottom, so he is looking at something like 20 % drag increase from the perfect template. The stock Insight looks to be something like a 70-80% drag increase from the template. Am I in the ball park?
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