Matt,
I used a rubber insert on the anchor stop nuts to keep the resin out of the
threads. These do an excellent job. The same insert holds the stop nut in
place while the resin cures. After the resin cures, pull the insert out for
a clean installation. Theoretically you throw away the rubber inserts after
one use. The anchor nuts are purchased with the inserts already in place.
(They are pricey.) The inserts are quite durable and reusable many times.
I have re-used the inserts on standard anchor nuts from AC Spruce fifty
times at least. The inserts I have are for 10-32 anchor nuts. I got them
from the trash can at Abaris Training. These can be seen at
http://www.clickbond.com/modules.php?name=Products2&op=category_view&categoryid=9
On all my anchor nut installations on spruce and plywood, I drill a hole at
each rivet hole into the wood at the anchor ear. I insert a rivet into the
hole along with the epoxy resin. The resin keeps the rivets in place and
the rivets keeps the anchor nut from spinning when the screw or bolt is
torqued.
Sid Wood
Tri-gear KR-2 N6242
Mechanicsville, MD, USA
------------------------------------------------------------------------
Hello Matt,
I used a 1-1/16" wide 6' hinge p/n MS20257p2-6 Aircraft Spruce has
them. You're supposed to use stop nuts on the back of the spar but good
luck keeping resin out of them.
Larry Bell
On Sat, Jan 2, 2016 at 6:07 AM, Matt Quimby via KRnet <krnet at list.krnet.org>
wrote:
> Hello all, I?ve got two questions. First, what size piano hinge is used
> for the ailerons? Second, how are they attached to the false spars? I?m
> looking at countersunk bolts into captive nuts flexed onto the back of the
> spars, but my 1979 version of the plans doesn?t say anything on the
> subject. How did some of you who have finished your projects attach these?
>
> -Matt Quimby
> kr2pilot.blogspot.com
> _______________________________________________
