7
OPTIONAL: If you'd rather use glue instead of silicone adhesive
to hold the bottom fairing to the wing, be sure to strip the covering
material off the bottom of the wing inside the marked lines before
gluing so that you have a wood-to-wood joint.
Also strip the
covering material off the mating edges of the bottom fairing. Be
very careful not to cut into the balsa wood wing sheeting while you
are cutting away the covering material! When ready, permanently
glue the fuselage bottom fairing onto the bottom of the wing with
thick CA glue or epoxy.
❑
13) Plug a standard Y-harness chord into the "aileron" slot in
your receiver.
Plug the ends of your aileron servo extensions
coming out of the wing into the dual ends of the Y-harness chord.
Connect the airborne battery pack and switch harness to your
receiver and then turn on your transmitter. You should now be able
to operate your aileron servos.
Perform the following setups:
a. Center the aileron servos using the transmitter trims
and/or the radio computer options.
b. Position the servo output arms on the output shaft to
exactly 90
O
upright when the servos are neutral.
c. Test the action of the servos, making sure the output arms
move freely and that they move in the correct directions for left and
right aileron action.
d. Turn off the radio system and disconnect the aileron
servos from the Y-harness.
❑
14) Locate one left and one right metal control horn and eight
M2.6 x 10mm Metal Screws.
a. Tape the ailerons in neutral position and lay the wing upside
down on your bench.
b. Position one of the control horns in place on the bottom
leading edge of the appropriate aileron. Be sure to line up the arm
of the control horn with the servo output arm. Also make sure that
the holes in the control horn are directly over the hinge line. Then
mark the control horn's 4 mounting hole locations onto the aileron
with a fine-point marker pen.
c. Drill a 3/64” dia. (or #56 drill) pilot hole into the aileron at each
mark. Mount the control horn in place, using the M2.6 x 10mm
Metal Screws. Repeat this process to attach a control horn to the
other aileron.
wing in place into the wing saddle and check the overall fit before
proceeding.
❑
10) Locate the two 1/8" x 1-1/2" x 1-1/2" plywood wing bolt
plates. The wing bolt plates are already pre-drilled in the center to
pass the nylon wing bolts. Notice that there are also holes for the
wing bolts pre-drilled in the rear center section of each wing panel.
Hold one of the wing bolt plates in position on the BOTTOM of the
wing, aligning the hole in the plate with the bolt hole in the wing.
Use a pencil (or fine tip marker) to draw the outline of the plate onto
the wing. Do the same for the other wing bolt plate, marking its
location on the bottom of the other wing. Use a hobby knife to
remove the covering material on the wing, about 1/8" inside the
wing bolt plate outlines. Glue the wing bolt plates to the wing with
thick CA glue, carefully aligning the bolt holes. Make sure there is
no excess glue inside the holes and let dry.
❑
11) Locate the two nylon wing bolts. Mount the wing in place on
the fuselage, using the nylon wing bolts to secure the trailing edge
of the wing to the fuselage. The nylon wing bolts should pass
freely thru the holes in the wing and thread into the blind
nuts that are pre-installed in the fuselage. If the wing does not
assemble cleanly and freely to the fuselage at this point, you need
to find the cause of any binding and fix it now, before proceeding.
❑
12) With the wing mounted to the fuselage, set the pre-covered
fuselage bottom fairing in place on the bottom of the wing.
Carefully align it with the fuselage. Use a felt-tip pen to mark the
location of the bottom fairing on the wing surface. Remove the
wing from the fuselage. Put a bead of silicone adhesive on all the
edges of the bottom fairing that will contact the wing - i.e.: the
sides, the front and back edges, and the inner cross pieces.
Carefully set the bottom fairing back in place on the wing, right on
the guidelines. Tape the bottom fairing to the wing in a few places
to keep it from moving. Clean off any excess silicone that oozes
out by first scraping it off with a clean flat stick, and then wiping the
smears with a rag soaked in methanol or CA debonder. Let dry
thoroughly.
IMPORTANT: After you finish mounting the control horns on
the ailerons for the first time, take them back off and set them
aside temporarily. Then put a few drops of Thin CA into each
of the screw holes in the aileron. The Thin CA will soak into
the threads in the wood, and when it dries the holding power
of the threads will be much stronger. Use Thin CA only, not
medium or thick CA. Let the Thin CA dry completely before
remounting the control horns onto the ailerons.