[kach22i]

Originally Posted by freebeard

To test you premise you could tuft test the bed gap.

The bed gap is a dead pocket of air and can be sealed up with a foam rubber gasket.

The area above the bed can also be sealed flush, but like I said I favor an aileron/flap/flaperon/slat type gap which induces venturi type flow (in theory).

Wings - THE ZENAIR STOL CH 801-HD



It does look like any type of air gap increases drag however.

http://ecomodder.com/forum/showthrea...n-32407-2.html


I suppose one could just tape it sealed.

http://ecomodder.com/forum/showthrea...ail-33283.html


Interesting graphics.

http://ecomodder.com/forum/showthrea...fo-2072-2.html

Compared to the standard blunt end (a), adding what they call attikas (fascias or parapets; flat, parallel panels) (b) delays separation and moves the tail vortices back (reduces Cd by up to 10%); these can be set inward (c), further reducing the size of the „dead zone“ (reduces Cd by 0.06, which is about half as good as the ideal tapered tail); the open-ended Kammback made of flat panels (d); and „Fluid Tail" (e).

http://theaviationbusiness.blogspot....end-stall.html