Great Planes 27% Extra 330S ARF - GPMA1413 - Manual (Page 21)

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4. Securely glue the plywood fuel tank tray into position.
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5. Mount the fuel tank to the tray with the Velcro straps
and 1/4" [6mm] R/C foam rubber between the bottom of the
tank and the tray.
Refer to the photos below while hooking up the fuel lines.
(Photos of the gas installation are shown, but the
instructions and suggestions in the photos apply to
glow engines as well. Note: Tygon fuel tubing is shown
in the photos.)
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6. Plan the fuel line setup thinking about how you will be
fueling the model, where the fueling and vent/pressure lines
will be located, how to guide the fuel lines around the muffl er
and engine and where the lines will go through. There are also
plywood dual and a single fueling line mounts that could
be used to mount the fueling and vent lines, or you could use
another method for fueling the model such as fuel line dots
or a fuel fi ller valve. The dual mount in the photo secures the
fueling line and the vent line for gas engines. Both lines are
closed during transport (to keep any remaining fuel in the
tank from leaking), but the vent line is open whenever the
engine is running. The fueling line is open only when fueling
or defueling the model.
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7. Once you have determined how you will be routing
the fuel lines and fueling the model, remove the engine if
necessary, then drill 1/4" [6.4mm] holes through the fi rewall
or other parts of the engine box for all the lines.
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8. Assemble the fueling line mounts and glue them into
position. Coat the mount with epoxy or fuelproof paint, allow
to dry, then connect the lines.