Eric, I would think that mylar that is 12 years old would have lost its
flexibility. It gets pushed up with upward aerleron or negative flap
settings and tends to stay there or very slowly flex back down to "neutral".
So going to positve settings will be difficult.

I don't know how you could put "life" back into the old plastic, but I would
be interested to hear.

BT

"Eric Greenwell" wrote in message
news:JfBYg.3919$5v5.3761@trndny08...
My top surface mylar seems to have lost some of it's curvature, because it
doesn't quite touch the aileron and flaps when they are in positive
positions. Does anyone know a way to put the curve back into the mylar
without removing it? It's so well adhered and smoothly installed, I'd like
to leave it on if at all possible, but I think it may be degrading my
climb while thermalling. The mylar is almost 12 years old.

--
Eric Greenwell - Washington State, USA
Change "netto" to "net" to email me directly

"Transponders in Sailplanes" on the Soaring Safety Foundation website
www.soaringsafety.org/prevention/articles.html

"A Guide to Self-launching Sailplane Operation" at www.motorglider.org