"Eric Greenwell" wrote in message
.. .
In article ,
says...

Is the spar cap on the Duo Discus bonded to the inner skin or the
outer skin? If it is bonded to the outer skin, it would not have the
foam to go through, which should ease the problem considerably.
--
The spar caps are bonded to the inter skin of both the upper and lower
skins.
A drawing of this is given in the appendix to the Schempp-Hirth Tech Note
for the inspection of the Duo wing. Of course the Tech Note may be viewed
on the Schempp-Hirth web site: www.schempp-hirth.com

Duane