Quickie Q2 Lite Construction Manual - page 268
full header tank is sufficient for over 225 statute miles at economy
cruise. The main fuel tank is filled from a fuel cap located on the
right side of the fuselage just ahead of the instrument panel. The
header tank can only be filled using the fuel pump.
FUEL FILLER SYSTEM
.....
Provided with your Q2 kit is a small storage bottle. By cutting
the ,neck from this bottle, the upper part can be used as the fuel
cap. The storage bottle top is compatible with fiberglass/epoxy
laminates. As an option, the builder might consider using a
conventional aluminum fuel cap, but the mounting will be more
difficult.
.....
Once the top of the bottle has been cut off, trundle down to
your nearest plumbing supply place and find a piece of PVC pipe of
approximately the same diameter. Then, trundle back home and laminate
the storage bottle neck to the PVC pipe with 2 BID.. Be sure to sand
both surfaces prior to the lamination.
.....
Take a magic marker and mark the location on the outside
fuselage skin where the fuel filler door must go. Carefully, cut out
a door and save it for later. Next, make ,a recess for the fuel cap
from 1/4" white foam and fiberglass/epoxy.
.....
As shown in the sketches and pictures, the PVC pipe is bonded
into position with flox. The recess prevents spilled fuel from
entering the cockpit.
.....
To hinge the fuel cap door, you could use a small piece of hinge
and bond it in place. However, because of the fuselage shape, this
may not be satisfactory. An alternative is to make a small pin type
hinge. Find a small diameter (about 1/16" diameter) steel rod. Grease
it with Vaseline to prevent adhesion by the epoxy, and lay it flat
against the upper inside portion of the fuel cap door. Laminate 3 BID
over it. When cured, the pin will still be able to rotate, but will
be restrained by the cured laminate. Finally, fit the door carefully
and bond the ends of the pin to the fuselage on either side of the
fuel cap door cutout. Presto, a hinged fuel cap door.
.....
Finally, drill a 1/16" diameter hole in the top of the fuel
filler cap. This will serve as the main tank vent.