Quote:
Originally Posted by aerohead
The chart and its values are only for a fuselage of the fineness ratio shown.
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Correct. And it is way too long and skinny to help us estimate the difference between the two Vetter tails pictured. The first 20% truncation of the fuselage basically chops off all of the boat tail already.
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Ground effect: Any minimal ground effect that the two bikes have will be quite similar and can be tossed out as a common factor. We are only concerned with the comparative values. Nothing absolute. The 22* ice cream cone is closer to the actual bikes although it is too short. An 11* ice cream cone, or better yet, 4 feet tall hemi front rounded wedge at 11* on each side would give quite a good means of comparison as we chop off length in the front or the back.
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Foil sim shows the x,y code for the given shapes but it can't be edited.