Great Planes Giant Extra 330L Kit - GPMA0250 - Manual (Page 32)

❏ 3. Slide the 36" aluminum tube through the fuse. Center
the tube on the fuse, and mark the tube with a permanent
marker where it exits both of the center box sides.
❏ 4. Fit the aft anti-rotation dowel through the slots in the
center box sides and center it on the fuse. NOTE: The
forward anti-rotation dowel will not be installed until final
assembly. Set it aside in a safe place.
❏ 5. Temporarily fit the die-cut 1/8" ply servo/tank tray
(STT) in position. NOTE: Do NOT glue this tray at this time.
You will install the servos, tank, receiver and battery onto
the tray prior to its final installation.
❏ 6. Slip the right wing panel onto the tube and dowel until
it is tight against the center box side, making sure that the
mark you made on the tube is still properly positioned off
the left side of the center box. NOTE: If the wing panels do
not fit perfectly flush the whole length of the root rib, that’s
OK. The outer shell will cover the wing/fuse joint. Simply be
sure the wing has good, firm contact against the fuse.
❏ 7. Using the previously drilled hole in the wing tube bolt
block as a guide, drill a 7/64" hole through the wing tube bolt
block and through the top of the wing tube. Tap the top of
the wing tube with a 6-32 tap. Bolt the tube to the right wing
panel with a 6-32 x 3/4" bolt.
❏ 8. Slide the left wing panel onto the tube and flush against
the fuse. DO NOT drill or mount the left wing panel at
this time.
❏ 9. Using a tape measure, measure from the center of F11
to the trailing edge of each wing panel. If the measurements
are not identical, note which side needs to be shifted, then
remove the wings and the wing tube socket from the fuse.
Enlarge the hole in the center box slightly. Reinstall and re-
measure. Adjust as needed until a perfect fit is achieved.
NOTE: This measurement’s accuracy is critical to 1/16".
❏ 10. Once the wing is properly aligned, glue the center wing
tube socket to the center box with medium CA and sand it
flush. DO NOT glue the servo/tank tray in at this time.
❏ 11. Drill, tap and bolt the left wing to the tube as you did
the right.
❏ 12. Install the remaining piece of stab tube socket in place
in the round forward hole in the aft box sides. DO NOT glue
at this time. Slide the aluminum tube through the stab tube
socket and center it on the fuse.
NOTE: The oblong hole to the rear of the tube hole is for
running the elevator servo leads.
INSTALLING YOUR WING
When you fit the Extra’s wing to the tube, you will find it is
a snug fit that requires some force. When putting your
aircraft together to fly, it is helpful to have someone
putting light pressure against the first wing tip or to butt
the tip against a car tire, then push the wing onto the tube
from the other side. To remove the wing from the aircraft,
stand with the fuselage resting against the back of your
legs and pull the wing away from the fuselage. Always
handle the wing by the leading and trailing edges and be
careful not to put your hand through either the wings’ or
fuselage’s sheeting.
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