Quote:
Originally Posted by skyking
Hmm.
8 -1.7 = 6.3 high
8 - (2(1.7)) = 4.6 wide
I get 28.98, or a reduction of 55%
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Oops. Now you got me !
I only counted the decrease from one side (i.e 6.3') and then squared that.
So it's indeed a reduction from 8' , to 8' - (2 x 1.7) = 4.6'
If you start from 8' x 8', and angle in both sides + top & bottom, you'll end up with a tail area of 4.6' by 4.6' - or only 21.2 square feet.
That's a serious reduction.
It will work open ended.
The aft edges need to be sharp / well defined so the air releases smoothly.
A 13 ft tail is going to stick out a lot, and will greatly increase the swept area aft while turning. Could be dangerous.
Seeing you might want to make the boattail folding twice, I wonder how much smooth length you'd need before you could do another angle change.
IIRC I've read somewhere that you can't get away with a 12° angle-in twice, so the second angle would have to be less.
Maybe aerohead can shed some light on that ?