From my experience building my SS7, install the ribs onto the spars with the drag/antidrag braces installed , then varnish all the ribs. The more coats, the more protection.
Dick B
Re: When to varnish the wing ribs?
From my experience building my SS7, install the ribs onto the spars with the drag/antidrag braces installed , then varnish all the ribs. The more coats, the more protection.
Dick B
Re: When to varnish the wing ribs?
My $.02 Wait until you are about to cover before varnishing or you end up whipping up a few extra batches. However, if you live in a humid climate I would be inclined to do it sooner as the false ribs may warp. Anything with a flange/web on it should resist warping....
Re: When to varnish the wing ribs?
I agree with Dick B, varnish after all ribs and false ribs are installed, before any flaperon brackets. This allows the hysol to bond to bare wood (much better bond than to varnish) and then totally seals up the bare wood for moisture and warping protection. Its "only" 3 coats required, and believe me its no fun; the epoxy varnish fumes are terrible. IMHO it was the worst part of the whole build.
Jim Ott
Portland, OR
Kitfox SS7 flying
Rotax 912ULS
Re: When to varnish the wing ribs?
but the flaperon brackets are also bonded to the ribs...
shouldn't i bond the brackets to bare wood?
Re: When to varnish the wing ribs?
On a recover should the wings be varnished again and what is the best product to use.
Norm
Posting Permissions
Reply With Quote