At 02:05 02 February 2019, Martin Gregorie wrote:
On Fri, 01 Feb 2019 17:29:37 -0800, John Foster wrote:

I was given a junked K8b due to water damage to the wood at
the wing
root and multiple tears in the original fabric and
chipped/peeling
paint. However, it looks like it may be restorable (worth it,
that's
another story). Anyway, I'm interested to know if there is an
online
repair manual that lays out the specific techniques of repairing
or
replacing wood in the wings, and specifications on what type
of wood to
be used, etc. I looked around and found the list of ADs, but
nothing
that laid out what I am looking for. I've contacted Schleicher
as well,
but they simply directed me to a link on their website, that
didn't
really give the information I needed. This is a certified glider,
and
I'd like to keep it that way, as I'm hoping to use it as a club
glider.

If you can't find anything more specific, this might help:

Workshop Practice For Building and Repairing Wooden Gliders
and Sailplanes
by Hans Jacobs publisher Eqip, 45 euros.

Available from Eqip, amazon.de or www.vintagesailplane.org

I've no personal experience of that book, but I do have some of
Eqip's
other books (Sailplanes 1920-1945, Sailplanes 1945-1965 and
Sailplanes
1965-2000, which are excellent.


--
Martin | martin at
Gregorie | gregorie dot org


Schleicher has all the drawings. The plywood used is birch, GL I
spec. Measure thickness or original material when replacing. Some
is 5 ply, but most ia 3-ply. Wood is spruce by heart. Specs are in
the Jacobs book.

Wooden Sxhleichers are known to suffer from Kaurit glue joint
brittleness by ageing, and a full glue survey of wings, fin and
controls would be prudent to see if a rebuild is viable. Have a look
at the YouTube channel “Kaurit in gliders” to see what to look for...