Quickie Q2 Lite, Construction Manual

Page: 55 / 299

CUTTING THE UNI SPAR CAPS
..... The spar caps used in the main wing, vertical tail, and canard,
are strips of UNI cloth that you will cut from the roll provided in
the kit. Begin by unrolling the roll on a long, flat surface. The
example to be used here will be a spar cap A that is 8" wide by 50"
long. You would measure a 8-1/4" wide piece (to allow for frazzling
of the edges) by 50" long, with the fiber orientation running along
the 50" edge.
..... The technique is one of finding the one strand that is at the
edge of the 8-1/4" width, cutting it, and then pulling that whole
strand the length of the spar cap to remove it. You will now see a
clearly visible gap in the UNI cloth where that one strand used to
be. Now, using an Exacto knife or razor blade, cut all of the cross
fibers along that gap, thus severing the spar cap from the rest of
the roll.
..... Carefully mark the cap with a centerline (in this case at the
25" point, mark it with the letter A and roll it up to keep dirt out
of the fibers. When you next unroll it, you will probably find that
the edges are frazzled. As long as you don't reduce the width below
the original callout (in this case 8") you may pull off strands that
are frazzled. Be careful to only pull loose one strand at a time or
else the whole spar cap will start coming apart!
GLASS-TO-GLASS
..... In order to improve the rigidity of a part, you will
occasionally be asked to perform a glass-to-glass layup, sometimes
abbreviated as GTG.
..... The example shown here is a glass-to-glass layup on a bulkhead.
Begin by glassing one side of the bulkhead as usual. Next, having
turned the bulkhead over after curing to prepare the other side for
glassing, you will remove foam with a smooth transition so that your
next layup will butt up against the previous glass layup.
.....
The amount of "overlap" necessary varies with the loads. On
bulkheads, use a minimum of 3/8", on the trailing edges of ailerons
and elevators use 1" minimum, and on the trailing edges of the wing,
use 3/8" minimum.