Great Planes Lancair 60 ARF - GPMA1347 - Manual (Page 16)

the CA to cure. Then, re-insert the screw and again remove
the screw. Run your finger over the hole. You will probably
notice a small burr or bump on the metal. Remove the burr
using 220-grit sandpaper.
❏
8. Insert the tube back into the right side stab, aligning
the hole in the stab with the hole in the stab tube. Hint: A
T-pin will be helpful in aligning the holes. Attach the stab to
the tube by installing the #2 x 3/8" [#2 x 9.5mm] sheet metal
screw through the hole in the bottom of the stab and into the
tube. Be sure to tighten the screw until it is firmly resting against
the plywood that is underneath the balsa skin of the stab.
❏
9. Insert the tube back into the fuselage with the right
side stab attached to the tube. Slide the left side stab onto
the tube, making sure the root rib of the stab is tight against
the side of the fuselage. When properly installed on the
tube, drill a 1/16" [1.6mm] hole into the aluminum tube and
into the wood dowel inside of the tube.
❏
10. Remove the left side stab from the tube. Install a #2
x 3/8" [#2 x 9.5mm] sheet metal screw into the hole in the
tube. Remove the screw and apply a drop of thin CA into the
hole. Allow the CA to cure, then re-insert and again remove
the screw. Run your finger over the hole, feeling for a burr.
Remove any burr from the tube.
❏
11. Re-install the stab to the tube by inserting the #2 x
3/8" [#2 x 9.5mm] sheet metal screw through the hole in the
bottom of the stab and into the tube. Be sure to tighten the
screw until it is firmly resting against the plywood that is
underneath the balsa skin of the stab.
❏
12. Locate two 36" [914mm] wire pushrods threaded on
one end and cut them to a length of 27" [685mm], making
sure you cut the wire off at the unthreaded end of the
pushrod wire. Insert them into the pushrod tubes that are
used for the elevator control. (These are the tubes in the
white molded blisters on the fuselage.) The threaded end of
the pushrod should be towards the elevator.
❏
13. Position a large nylon control horn on the right elevator,
positioning it as shown in the sketch and aligning it with the
pushrod. Mark the location for the screw holes. Drill through
the marks you made with a 3/32" [2.4mm] drill bit. Mount the
nylon control horn to the elevator by inserting two 2-56 x
3/4" [2-56 x 19mm] socket head cap screws through the
control horn and into the nylon mounting plate on the top of
the elevator.
❏
14. Thread a nylon clevis onto the threaded end of the
wire 20 turns. Install a silicone clevis retainer onto the clevis.
Then, install the clevis on the elevator control horn.
❏
15. Repeat the process for installing the control horn on
the left elevator.
❏
16. Install the rudder with three CA hinge strips following
the same technique used for the other control surfaces.
REMOVING THE STAB FOR TRANSPORTATION AND
STORAGE
When you find the need to remove your stab from the
fuselage, you will find that it is much simpler to re-install
the stab if you only remove the stab from one side of the
tube and leave the remaining stab attached to the tube.
By doing this you will not have any difficulty aligning the
hole in the stab with the hole in the tube when reinstalling
the stab half. If you are consistent in removing the same
side each time, you will minimize wear to the holes in the
tube. If you plan to remove the tube completely from both
stab halves, it is a good idea to mark the right and left
side of the aluminum tube to be sure everything aligns
properly when put back together.
If at any time you find that a screw is getting loose in the
hole, add a small drop of thin CA to the hole to add more
material into the hole. Our prototype did not experience
any loosening of the screw from normal flying but you
should check the screws every few flights to be sure they
are tight.
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