Quickie Q2 Lite, Construction Manual

Page: 217 / 299

Q2 Plans - Chapter 14 - Page 14-01
FUSELAGE DETAIL ASSEMBLY
WRAPPING THE TAILSPRING
..... The tailspring provided is a molded S-Glass roving tailspring with
extremely good bending strength along the length. Because of the
production method, however, the tailspring does not yet have sufficient
strength torsionally, to prevent torquing up in a tight taxi turn.
..... To provide this torsional strength you must wrap a piece of BID at
45 degrees to the length of the tailspring, around the tailspring until
you obtain 3 layers of the BID. Needless to say, you will prepare the
tailspring by sanding the surface. Pure epoxy is used for the
lamination.
MOUNTING THE VERTICAL FIN
.....
..... The vertical fin is mounted to the fuselage only after the rear
fuselage shells are bonded together.
..... The vertical fin sets down into the fuselage with the vertical fin
root end resting against the bottom of the fuselage. This necessitates
considerable trimming of the top fuselage to permit the vertical fin to
drop down through. Also, the nose of the vertical fin below the top
fuselage is trimmed back so that the vertical fin will rest flush
against the bulkhead. Trim slowly so as to avoid making a bigger hole
than necessary. The general arrangement drawing included here gives the
mounting arrangement. The vertical fin slot is located approximately 5"
forward of the tail of the fuselage, so that the nose of the vertical
fin can fit snugly against that bulkhead.
..... Use a plumb bob hanging from the trailing edge of the top of the
vertical fin, with the fuselage leveled laterally, to verify that the
vertical fin is positioned vertically. Your eyeball from a distance is
used for a second check.
..... When the vertical fin fits into the fuselage properly, you are then
ready to prepare for mounting the tailspring. The core foam on the
vertical fin is hollowed out as shown, so that the tailspring can slide
forward from the aft end of the fuselage. The aft fuselage may have to
be trimmed forward until the width is 0.75" MIN, which is needed for the
tailspring to slip through. The bottom fuselage can be slotted as shown
to insert the tailspring. Do not worry about removing excess foam as you
tunnel through the vertical fin core. It is necessary to have a minimum
of 0.8" of space in all directions around the tailspring in preparation
for mounting. Allow approximately 9" of tail spring length to protrude
aft of the end of the fuselage.
..... The vertical fin core foam is not dense enough to withstand the
tailspring loads. Therefore, when you are ready to insert the tailspring
permanently into position, you will mix up a substantial quantity of
flox to fill the hole first, so that when the tailspring is inserted,
generous squeeze-out will result. Remember, at least 0.8" of flox must
be around the tailspring to spread the loads. Note from the drawing that
the flox completely fills the fuselage aft of the vertical fin. Before
the flox has an opportunity to set up, verify that the tailspring will