Jim, we did Rob Helt's (the one I own now) with a 3X gun (set at about 55psi
if I remember right) and about a 3 lb bucking bar. Rob held the bar for the
whole "ordeal" and I ran the gun. A few rivets weren't pretty (drilled out
and replaced afterwards), but the other 99% turned out great. Make sure you
write the rivet lengths on the spar for a no thought process while you are
heavy into the riveting and have the doublers all held together with bolts
before you start banging away!! ALSO...make sure while you are drilling the
multiple holes and rib holes that you don't use cleco's to hold things
aligned!!! You >MUST< use bolts or things will move enough that you won't
get those nice round rivets in, expecially through 5 or 6 layers of .063! I
am lucky enough that I have thousands of AN3 bolts in bulk (and if you want
to fly up and get a few handfuls I'll make you a deal you can't refuse!!)
Don't forget the Proseal between the doublers and the spar as far out as the
tanks are going on your build (as I mentioned on Sat) before you start
riveting. You can do it later over the top of everything if you put all the
rivet heads on the back side of the spar, but nice to guarantee that fuel
can't migrate between the doubler layers as it tries to escape the tank! You
should put the rivets in with heads in the tank no matter what for ease of
spreading proseal while sealing the corners etc.
I just went out to the shop and looked back in the work logs. It took us 4
hours to do the first wing spar and all the doublers and then 3 hours to do
the second one! Before starting I mixed 13 tbl spoons of EP430 + 6 1/2
catalyst and 100 Grams + 10gms activator for Proseal. I have no mention of
mixing more Epoxy when starting the second spar, but did mix 100 + 10 more
Proseal for the second spars assembly.
Cheers,
Wayne O'Shea
www.irishfield.on.ca
oifa@irishfield.on.ca
----- Original Message -----
From: "Jim Cole" <
jcole@rangroup.com>
To: <
murphy-rebel@dcsol.com>
Sent: Wednesday, June 11, 2003 12:37 PM
Subject: Re: Solid Rivets
We are just about to get into the solid rivet part of the wing spars and
was
wondering what everyone's opinion was on the right tool for the job? Some
have
suggested farming it out - others a rivet squeezer - and still others the
bucking bar etc.
Is there one brand of rivet squeezer that brings good value. One we looked
at
in the ATSC catalogue was $290US.
Does anyone have one they want to sell because they are finished or a
source
for used equipment?
Thanks
Jim
083 SR/Moose
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