11
slip the backplate onto the engine. Slip the propeller onto the shaft
and secure it with your engine's nut and washer. Snap the spinner
nose cone in place into the base plate channels and use the four
mounting screws supplied with the spinner to mount it to the
backplate. Don't over-tighten the screws but bring them up snug.
LANDING GEAR ATTACHMENT
❑
1) Mount the formed aluminum main landing gear in place on
the fuselage using the three M4 x 15mm PWA Bolts provided.
Note that blind nuts have already been pre-installed inside the
fuselage for these bolts.
❑
2) Locate the bag containing the tailwheel assembly. Hold the
short leaf spring in place on the fuselage. Make sure it is lined up
with the fuselage centerline, and that it is as far back as shown in
the pictures. Use a fine-tip marker pen to mark the locations of the
3 mounting holes onto the fuselage. Drill the holes through the
bottom of the fuselage with a 1/16" dia. drill bit.
perfectly with the carburetor/needle valve position.
Use the
Dremel
®
Tool and tapered bit to open the hole enough to insert and
install the needle valve in the carb. Be sure the hole has at least
3/32" clearance around the needle valve to avoid contact.
❑
6) OPTIONAL: You must be able to fuel and de-fuel your
EXTRA conveniently. There are several commercially available
fueling systems that would work with this model. We have used
and highly recommend the Du-Bro #334 Kwik-Fill Fueling Valve for
glow engines.
In this optional step, we will explain how we
mounted our fueling valve. All that's required is to make a simple
90
O
aluminum bracket to hold the valve, mount it to the firewall, and
then make a small hole in the cowl to accept the fuel probe. We
mounted our filler bracket near the left edge of the firewall. Our
bracket was made from K&S 1/16" thick aluminum sheet. Drill one
end of the bracket with a 3/8" dia. hole to accept the fuel valve body
and drill two 7/64" dia. holes at the other end, allowing it to be
mounted in place with two #4 sheet metal screws (not supplied).
Mount the bracket in a position that will put the valve as close as
possible to the cowl but not contacting it.
A small hole must be made in the cowl, directly over the fuel valve,
to allow the fueling probe to be inserted into the valve. Place your
penlight behind the bracket, at the hole for the filler valve. You can
now clearly see exactly where the hole must be on the outside of
the cowl. Mark this location with a marker pen, remove the cowl
and use the Dremel
®
Tool and a tapered bit to open up a hole about
5/16" in diameter at the mark made earlier. Put the cowl back on
and check your work. Adjust the hole as needed to allow easy
insertion and removal of the fuel probe.
❑
7) With the engine and cowl mounted in place, the spinner can
now be fitted to the engine. The spinner supplied in this kit has
been molded to accept APC propellers up to 16 x 8 in size. The
shaft hole in the spinner backplate must be made to fit your
particular engine. If your engine shaft is smaller than the hole in
the spinner backplate, plastic prop shaft adapters are included to
correct the problem. If your engine shaft is larger than the hole in
the spinner, it can be drilled to fit. This should be done using a drill
press. Once you've adapted the backplate to your engine shaft,