Great Planes Giant U-Can-Do 3D - GPMA1271 - Manual (Page 15)

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1. Roughen the outside of the 11-3/4" [300mm] gray
outer pushrod tube with coarse sand paper. Fit the tube
through the firewall and the second former, leaving 1/2"
[13mm] protruding from the firewall. Glue the tube to the
firewall and the second former with thin CA.
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2. Arrange the stopper and tubes as shown in the photo,
then insert them into the fuel tank. Tighten the screw to
expand the stopper, thus sealing the fuel tank. Be certain the
fuel line weights (clunks) at the end of the fuel lines inside the
fuel tank do not contact the rear of the fuel tank. Otherwise,
the lines may become stuck above the fuel level and
discontinue fuel flow. Remember (or use a felt-tip pen to mark)
the fuel pick-up tube, fuel fill tube and the vent tube (that will
be connected to the pressure fitting on the engine’s muffler).
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3. Install the fuel tank in the fuse. Fit the neck through the
hole in the firewall. Be certain the vent tube inside the fuel
tank is pointing upward.
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4. Glue a 1/4" x 3/4" x 4-7/16" [6 x 19 x 123mm] balsa
stick to the fuse to hold the fuel tank in place.
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5. Attach a piece of fuel line to one of the tubes that has
a clunk on it and the fuel inlet tube on your engine.
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6. Drill a 1/4" [6mm] hole, 1" [25mm] above the motor mount.
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7. Drill a 1/4" [6mm] hole in the side of the fuse in roughly
the spot shown. Note: Take special care to not drill into
the fuel tank.
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8. Harden the hole in the balsa fuselage side with thin
CA. After the CA has hardened attach fuel line to the
second tube that has a clunk on it and route it through the
hole in the firewall and the hole in the side of the fuse. Cut
the fuel line so that 4" [100mm] is protruding from the fuse
side. Use a Great Planes Aluminum Fuel Line Plug (not
included) to plug this fill line.
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9. Attach a piece of fuel line to the vent tube on the fuel
tank and leave it long enough to reach the pressure tap on
the muffler.
Install the Fuel Tank
15