Quote:
Originally Posted by freebeard
I was questioning the rightward extent of l —truncation or transition to conic section? Both? According my little brass caliper on my screen the l/d illustrated is 11 over 13 eighths or 1.18. That puts it at about the rightmost dash after the rightmost hollow dot.
If the dashed triangle is ineffectual, just chop it off? Or round it off like a Dymaxion?
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The table shown by Mair does not include skin friction,so it kinda misrepresents reality.
*With zero boat tail mair's body was Cd 0.204
*With a tail truncated at the hashline Cd 0.122
*With the full tail, Cd 0.066
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Without the skin friction,the casual observer would imply that the rest of the tail is of little value,however,in free flight,it would mean almost a halving of the drag.
