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Wing Profiling Advice
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September 15th 04, 04:02 PM
Lorry Charchian
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(John Cochrane) wrote in message . com...
Welcome to the club. Every recent 27B I know of has had this problem
to greater or lesser extent. Mine had awful shrinkage and dimples
after only three months. I gather this is due to curing of the epoxy
gluing the spar to the wing skins, and will happen eventually in hot
or cold weather. I had mine fixed. The decline and then restoration of
the original (amazing) performance was noticeable. I was advised to
wait 3 years so the curing and dimpling is complete before fixing. I
ignored this wise advice and have a little additional shrinkage in the
two years since I had it fixed, but not yet enough to consider doing
it again. It's important to have someone you really trust do this; a
poor job can screw up the entire wing profile. I would advise paying
more to be sure the profiling is done right. BTW, I contacted the
factory under the warranty, but they blew me off. We're on our own
with this. On the good side, once it's done you have a great glider!
John Cochrane (BB)
Hi John,
I have some issues with my ASW 27A as well however I do not have
dimples in the true sense of the word. Have you or anyone else
measured the depth of the reported dimples? I thought I had dimples
which appeared in regular rows both spanwise and cordwise, however,
they had no depth and could not be felt. They were visible only when
looking at the wing obliquely in the sunlight. I am told they are
produced when the wing is being made. Apparently, when the wing is
made there are vent holes in the jelcoat which are filled with a
somewhat different material and then finished leaving what look like
dimples but are completely smooth. Do you have any depth measurements
of the dimples or further obsevations? By the way my ship was
manufactured in Oct.'98 and has flown about 750 hrs.
Lorry Charchian (LJ)
Lorry Charchian