X-Mozilla-Keys:                                                                                 
This is of universl interest for all aviation engines.

Bill Freeman wrote:

Paul,

I got mine from an industrial rubber supply house.  It is
red silicone rubber sheet with a fiberglass inner layer.  It is
about .060" thick.  It may be a bit too pliable for your
application, as it was for mine.  What I did, which worked
beautifully, is to fold the material over so that the rivets or
(Cessna original) staples go thru two layers near the cut
edges to hold it to the aluminum.  This puts a folded edge
against the cowling.  It is strong in bending, so the air pressure
doesn't blow past, but is very 'soft' in direct axial loading
since it can just bulge out. This gives a darned good fit
to the cowling, but it won't 'blow out' like some baffle seal
does.

I'm sure the LA area has an industrial supplier.  Be sure and
price shop.  This stuff is **extremely** expensive, like about
$50 per running foot, 36" wide.   But, you only need one or
at most two feet.  I think I might have managed to find a bit
cheaper supplier, but I forget who.  Might have been
McMaster-Carr in Chicago.

I just dug out my old McM-Carr catalog ('95) and they have it
for $45/ lin foot 36" wide in 1/16" thick, $60/ft same width in
3/32" thick.  This is pretty expensive, but you probably need
about 2 ft for the C182 .  Assume a 3/4" gap all around,
maybe 16 feet running, using a 3" wide piece folded double,
you'll get 4 pieces x 3ft or 12 linear ft from a running ft x 36" wide.
So, you'll need two feet.  This is very nice stuff tho.  Looks and
works much better than the 1/8" thick single stuff sold in the
catalogs for the same purpose.  That stuff works OK be tears
pretty easily due to no reinfocemnet.  The doubling over seems to
be a better way to seal, too.

McM-Carr is at (708) 833-0300 and the 1/16" is # 8612K11 and
the 3/32" is 8612K12.  Prices are up since '95, I assume.  Been thinking
of buying a foot of the 1/8" stuff ( $72/ft) and making a set of valve
cover gaskets.  Pretty steep tho.

Bill

PS
Ask your power coat guy for his most temp resistant stuff as there
are very many types of powders, polyester, epoxy, etc.

 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org