I agree with J.J.
Make sure the edge of the tape wipes and makes contact at the bottom
of the aileron when deflected. Install samples at discrete points to find
out if you have the correct radius and position for the Mylar.
Bottom hinged flap/aileron Mylar seal require a slightly different approach
versus the top.
Regards
Udo


"Marc Ramsey" wrote in message
m...
I need to replace the flap/aileron gap seal tape on our LAK-17A. The
control surfaces are bottom hinged, and the gap was factory sealed on the
bottom with what is apparently ordinary polyethylene tape. The tape cracks
over the hinges, which I would have to patch periodically, plus it shrinks
over time, limiting control movement and increasing stick forces.

It seems like Teflon tape is the way to go. I poked around and found
multiple online sources of 1" x 18 yard Teflon PFTE tape with high
temperature silicone adhesive on one side, available in thicknesses from
.0035" (~$25/roll) to .0115" (~$75/roll). There are less readily
available variations with acrylic adhesive, along with "High Density" PFTE
(100% stretch instead of 300%). Does anyone have any idea what thickness
and type of tape would be best for my needs?

Thanks,
Marc