ASG-29/ASW-27 wing refinish

Here is my hypothesis.
The SH lays up there spar cap into the wing skin, versus the
AS factory, which built there spar complete and separate from
the wing structure.
This requires a different joining technique and application
of epoxy slurry. In the later case the spar is set into the lower wing
skin in a controlled fashion, hence using less epoxy.
Before the top skin is set into place,
dams out of beaded foam are built, they are a bid higher then the
insight
of the skin when joint. The spar cap with the dams in place is now
filled
with an epoxy mixture. The shape of the mixture has a little inverted
V shape like a roof but shallower. This allows for the epoxy to make
contact in the centre first and pushes it out ward. At the same time
the foam dam gets pushed out of the way to allow for a bead to be form.
Due to the tolerances between the height of the spar cap and
the inner wing skin, there is more epoxy used then at the bottom joint,

hence more shrinking of the top skin occurs.

That does not explain the fact I did not have shrinkage on my
ASW24 wing in 16 years, unless, I venture to say, after 1999 a lot of
experience workers retired. I must assume that the tolerance were
also better before that time and better epoxies were used.
There is always a drive to keep the cost down.
I always like the idea of building the spar separate.
They got it right once they should get it right again.
Udo

Stewart Kissel wrote:
At 20:31 05 November 2006, Doug Haluza wrote:
I was at the Schleicher factory last week, and asked
about this. They did purchase new higher temperature
curing ovens to try to solve this problem, but it has
not helped much. It seems that it just has to run its
course over time. They did say that the shrinkage seems
to be a one-time thing, and it is complete after about
4 years.

Hmmm, I take it they have examined the construction
of this wing vs other wings that don't shrink and get
spar bumps. Far be it for me to question Teutonic
marketing rationale...but spending $100k+ on a glider
that is going to have its performance suffer as the
wing shrinks, then get to spend another $20k+ on reprofile
and refinish....am I missing something here?