The hinge line can be detrimental to the relative thick boundary,
if not covered properly to guide the flow over the hinge line,
the flow could separate.( there is an exception to this if the hinge line is
used
as a transition point)

The tape you are referring to would be just a seal but would not contour
the shape.

The edge of the Mylar tape .010" plus the edge tape .002" it
should not effect turbulent flow. A gap, covered by a sealing tape could.
The Mylar seal if it wipes it will seal. If you were to have difficulties
with this
a separate seal would be the way to go, as long as it does not interfere
with The Mylar.
Sometimes if the hinge is to close to the bottom surface it would be
difficult to get a wiping action
through all the motion of the flap and aileron.
I hope I understood your question.
Udo

"Marc Ramsey" wrote in message
om...
wrote:
Not sure that tape is the way to go, Mark. I have found that properly
installed Mylas is all that is necessary. Proof--------when the seals
on my Nimbus 3 needed replacing, I eliminated the internal seals and
also got rid of that ridiculous lower mylar that went inside the gap,
never did understand the reasoning there. Replaced it with Mylar on top
and bottom, nothing else. She climbed and cruised right with another
Nimbus 3 with factory seals.
Another data point..............The ASW-20 had a terrible reputation
for dropping a wing and entering a spin, when they first came
out.................then the spin problem seemed to go away, why? Most
20's today have Mylar, top & bottom. Was the external tape triggering
separation at low speed?

When JJ and Udo agree on something it must be true 8^)

Here is what I was thinking, and I am prepared to be proven completely
wrong. First, Mylar seals (combined with anti-peel tape) appear to be
thicker than Teflon tape, so unless I'm willing to go to the trouble of
routing a groove to inset the Mylar (which I'm not), the Mylar would seem
to me to be every bit as likely to trip the airflow as the Teflon tape.
Second, the point behind external tape (or internal seals) is to prevent
airflow through the gap. Are properly fitted Mylar seals actually going
to prevent this flow? Would it make sense to use Teflon tape to seal the
gap, then put Mylar over the tape?

Thanks,
Marc