Great Planes Extra 300S 1.20 ARF Patty Wagstaff - GPMA1305 - Manual (Page 21)

❏
7. Use 30-minute epoxy to glue the stab into the fuse. For
the most strength, apply epoxy to both sides of the stab and
inside the fuse where the stab fits. Slide the stab into
position. Wipe away residual epoxy with a paper towel and
alcohol. Use the pin and string to confirm the stab is aligned.
Stand behind the model to check the stab’s alignment with
the wing. Do not disturb the model until the epoxy has fully
hardened.
❏
8. Cut ten CA hinges for the elevators and rudder just
as it was done for the ailerons. Install the CA hinges on the
elevators and the rudder just as it was done for the ailerons
on page 8. Apply six drops of thin CA on each side of each
CA hinge.
❏
9. Remove the stabilizer outer panels from the fuselage.
Feel through the MonoKote on the bottom surface of the
stabilizer and find the openings for the elevator servos. Cut
the covering 1/8" [3.2 mm] inside the opening. Use a sealing
iron or trim seal tool to seal the covering to the edges of the
opening.
❏
10. Install the two elevator servos on the two stabilizers
with the hardware provided by the manufacturer. Make sure
you wick thin CA into the servo tray screw holes to
strengthen them.
❏
11. Find two 4-40 x 12" [305mm] threaded one end metal
pushrods, two threaded 4-40 metal clevises, two 4-40
unthreaded clevises, two hex nuts and four silicone
retainers. Cut the 4-40 threaded one end metal pushrod
1-3/4" [44.5mm] from the threaded end. Solder the non-
threaded 4-40 metal clevis onto the non-threaded end of the
pushrod. Use the soldering Expert Tip on page 10 as a
reference. Install a hex nut and the threaded clevis on the
threaded end of the pushrod until the pushrod is 3" [76mm]
long. Do this twice so that you end up with a pushrod for
each elevator. Remember to slip two silicone retainers on
each pushrod.
HOW TO CUT COVERING FROM BALSA
Use a soldering iron to cut the covering from the wing.
The tip of the soldering iron doesn’t have to be sharp, but
a fine tip does work best. Allow the iron to heat fully. Use
a straightedge to guide the soldering iron at a rate that will
just melt the covering and not burn into the wood. The
hotter the soldering iron, the faster it must travel to melt a
fine cut. Peel off the covering.
21