----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----
Jerry,
Your friend Jim has an idea going.
You know the old Sikorsky helicopters had lot of aluminum to steel surface
mating, and the tape and Permatex was the way the factory had of separating
them. It worked very well I might add.
Bob Parker
----- Original Message -----
Sent: Thursday, April 26, 2001 1:44
AM
Subject: Re: [COUPERS] Structural
failure
----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----
I talked to Gary at the airport and he said he had not talked to Jim or
anyone else about repairing wing spar corrosion. To his knoledge there is no
approved method to repair spar corrosion, and as far as putting mylar between
steel fittings and aluminum to prevent dissimilar metal corrosion, apparently
this is Jim's idea because it's sure not Gary's. He said the only way to
fix spar corrosion is to buy the new spars from Univair, or throw away the
corroded wings and see if you can find a clean pair from some where else. Gary
said he has refurbished approx. 25 coupes and out of them about 6 had metal
wings, 3 had wing spar corrosion and he scrapped the
wings. Jerry.
[EMAIL PROTECTED] wrote:
----[Please read http://ercoupers.com/disclaimer.h
tm before following any advice in this forum.]---- You know, about a year ago I talked with
Gary, one of the mechanics at the
shop that rebuilds a lot of Ercoupes in
Tucumcari, NM They had
repaired/restored 30 Coupes that had
various types and levels of corrosion.
All of them had wing spar corrosion and
28 of the 30 had metalized wings.
One idea they had was to place a thin
sheet of mylar between steel fittings
and aluminum such as the wing attach
fittings, the rear spar hinge and the
aileron fittings to prevent the
dissimilar metal corrosion. I don't know,
however, if they ever actually did this
or if it is an approved method of
repair. Certainly, painting both
surfaces with a self-etching primer would
help a lot. I wish the Tucumcari
group were on this List because I know they
have a very high level of experience and
could be of help to us.
Jim __________________________________________________
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