Quote:
Originally Posted by JohnForde
Current drawings illustrating Zevo's wake size.
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1) If choosing, I'd go with less than 14-degrees.
2) And it would integrate into the 'cuff' itself, where the local tangent angle agrees with the design slope angle.
3) If the slope begins on the 'yellow' perimeter, all the flow will have already been lost on the cuff, wherever the tangent angle reached 25-degrees.
4) If you must begin on the yellow line, then you're looking at a box-cavity technology, instead of a boat tail.
5) The extension panels would just go 'straight' to the rear, perpendicular to the rear of the box, with their trailing edge falling along an imaginary
streamlined path, capturing locked-vortices between the 'cuff' and the trailing edges.
6) And whether a boat tail, or box-cavity, the surfaces where they attach and adjoin each other. must be 'airtight'.
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Please look at #62 (permalink ).
This is a 'Cliff Notes' version of Boundary-Layer Theory, $75,000 if you want to get in college.