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Old Jan 17, 2011, 06:46 PM
SAM Elec GrdChmp04,07,10,12,14
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Smithfield, Ky.
Joined Sep 2001
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Airborn 1600 cap ribs and dihedral bracing

Having done the wing bisection the root panels need 1/16 Ply end cap ribs.
These are epoxied on and then sanded to conform exactly to the midsection sheeting.
Best tip on doing this is to put painters tape around the root of the wing section to
keep the epoxy from getting over on to the sheeting and also as a tell tale for when
sanding the cap rib to be flush with the sheeting.
Hold the tape about 1/16 back from the joint so that the epoxy does not glue the
tape in place, I also paint the epoxy on the ply rib with an acid brush that has
it's bristles shortened so that they are stiffer and can more effectivley brush out
the epoxy.
Next is the install of all the 1/16 ply dihedral braces on the Spars, Trailing edge
and leading edge.
There is a lot of cutting a fitting here and a pattern is cut from balsa first and then
traced onto the ply and all the braces are cut out. Make sure that the outer
ply grain is horizontal. A lot of even the aircraft ply now days is only 3 ply and
the two outer layers are in the same direction.
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