.
97.
a. Glue the die-cut lite-ply G-l
pushrod exit guide to the left side
of the fuselage as shown on the
plan. The outer edge of G-l
should be flush with the outer
edge of the fuselage main frame.
b. Glue scrap pieces of 1/8"x3/8"x2"
balsa in place on each fuselage
side to serve as cable exit guides.
c. When dry, drill the cable exit
guides with a 9/64" drill to accept
the nylon tubing guides. The
holes should be drilled at a
shallow angle so that the rudder
cables will exit the side of the
fuselage in the direction of their
attach point on the rudder control
horn. Cut two 3" lengths of nylon
tubing from the piece provided in
the kit and glue them into each of
the drill holes. Cut the tubes off
flush with the cable exit guides.
TIPS ON TANKS
The 24 oz. fuel tank shown on the
plans will provide sufficient run time
for most of the engines that are
suitable for the Spacewalker,
although there is plenty of room for a larger tank if desired. The plans show
a slant type, but other styles may be used as well. The simplest, most
trouble-free tank set-up to use in the Spacewalker is normal suction feed
with two vents, as shown in the diagram below. Both vent tubes should
curve upwards inside the tank. The clunk line on the fuel feed tube must
swing freely without hitting the back of the tank. Remember to use a fuel
tank stopper and fuel lines that are compatible with the type of fuel to be
used.
For best results, the fuel tank should be
positioned so that its centerline is even
with, to 1/4" below, the needle valve on
the engine. It can be mounted with scrap
balsa supports to hold it in place. Should
the need ever arise to remove the tank for
servicing, simply break away the balsa
supports. You can seal around the hole in
the firewall where the fuel lines come
through with silicone rubber sealer to
prevent exhaust oil from leaking inside the fuselage. Run fuel tubing from the
fuel feed line to the carburetor. Two more lengths of tubing run from the vent
tubes to the bottom opening in the cowl. To fuel the aircraft, simply pump fuel
into either of the vent lines until it runs out the other. Plug one of the vents with
a short bolt to keep the fuel from siphoning out. It's not necessary to remove
the feed line from the carburetor to refuel. To defuel, turn the fuselage upside-
down and pump any remaining fuel out through one of the vent lines. If your
engine's muffler is equipped with a pressure tap, you can make use of it to
help provide a more reliable fuel feed. To do this, connect one of the vent lines
to the pressure tap. The other vent line must still be plugged with a bolt to
operate properly. To refuel, remove the vent line from the pressure tap and
remove the bolt from the other line, then fill the tank as you normally would.
BUILDER'S TIP:
The task of drilling the holes for the rudder cable guide tubes at the shallow angle can be made easier, as follows. Use a
small drill bit (1/16" dia.) or a sharpened piece of music wire to first make a pilot hole. The 9/64" drill bit should then
follow the pilot hole with no problem.
Attaching The Tail Surfaces And Tailwheel
NOTE: Many modelers prefer to cover their tail surfaces before attaching them to the fuselage. If you choose to do this, be
certain that all the hinge slots are cut and the control surfaces move freely with the hinges temporarily in place.
98.
a. With the wing bolted in place, position the stabilizer on the fuselage and
check its alignment carefully. Be certain it is square with the fuselage by
viewing it from the top and rear. When you are satisfied with its position,
make small marks on the fuselage and stabilizer so that it can be returned
to the same position.
b. If you have already covered the stabilizer, the covering material will have
to be cut away (use a sharp razor blade) where the stab rests on the
fuselage, so that you will have a strong wood-to-wood glue joint. Epoxy the
stabilizer to the fuselage, lining up the marks that you made earlier.
Recheckthe alignment of the stabilizer as the glue dries, making
adjustments as necessary.
NOTE: The elevator must be permanently hinged to the stabilizer before the fin is attached.
Summary of Contents for SIGRC61
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