[Phase]

Originally Posted by aerohead

1) If you can reliably isolate the OEM wake perimeter, and estimate it's wake area by measuring the width, in one-inch slices, from top to bottom, this will provide your Cd 0.24 'baseline.'
2) Since drag varies linearly with wake area, any desired percentage reduction in Cd will simply be that percentage in wake area reduction.
3) If you had AUTO-CAD, different scale renderings of the wake area could be evaluated from the automatic pixel count function, provided to determine the required tail length which would produce that 'size' of wake.
4) It's 'simple, not easy.'
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5) Without CAD, you could fabricate a 'cardboard and duct tape' length of boat-tail capable of supporting attached flow, and by percentage, using either width or height, determine the 'size' of the new rear transom which would generate the desirable wake size.

That’s what I was going to do. I was going to do a cardboard and duct tape box cavity 2 feet extension that follows the currently rear separation angles and then see how much smaller that wake size is