onto the hardwood mounting rails. Remove the servo from the
stab.
2) Pre-drill small guide holes for the servo. Re-install the servo
and mount it in place into stab servo bay. Use a piece of masking
tape to hold the elevator in the neutral position to the stab.
3) Attach a clevis to the servo output arm and on the other end,
attach one of the control horns. Press the servo output arm in
place onto the splined servo output shaft, with its arm pointed
outwards towards the stab tip and at 90
O
to the servo body.
4) Like the ailerons, the two elevator halves have been built with
thick hardwood control horn mounting pad. Holding the bottom of
the elevator at an oblique angle to a light source usually allows you
to see its location.
a) Turn the threaded metal control rod to adjust the distance of the
control horn from the leading edge of the elevator bevel. The
correct position for the elevator control horn is with its forward
mounting pad edge up to the bevel edge of the elevator. The
upright arm of the control horn should be directly facing the output
arm and the control rod should be parallel with the servo body.
Hold the control horn in this position and mark the mounting hole
locations onto the elevator with a marker pen or sharpened pencil.
b) Move the pushrod and control horn out of the way. Use an
electric drill and a .043" (#57 index drill) to drill four guide holes at
the marks just made. Use four T2.6 x 16mm Phillips head screws
to mount the control horn, just enough to establish threads in the
mounting pad. Remove the screws and apply a drop of thin CA
glue with a fine-tipped applicator, into each screw hole to harden
the threads.
Remount the control horn with the screws and
tighten them firmly. Repeat the above steps with the opposite stab
and elevator assembly. Remove the pieces of tape holding the
elevator in neutral.
be aligned to the servo at 90
O
and should both be in line and
parallel with each other. Select two of the pre-assembled aileron
linkages. On both pushrods, thread the two lock nuts all the way
in toward each other, leaving the maximum amount of threads
exposed. Connect one of the R/C links to the servo arm on both
servos. In the photos we show the left wing panel, so we selected
two left control horns. Connect the two control horns to the R/C
links on each pushrod.
b) Place the control horn mounting pad onto the surface of the
aileron. Turn the threaded metal control rod to adjust the distance
of the control horn from the leading edge bevel of the aileron. The
correct position for the control horn on the aileron is with its
forward mounting pad edge up to the bevel edge of the aileron.
The upright arm of the control horn should be directly facing the
output arm and the control rod should be parallel with the servo
body. Hold the control horn in this position and mark the hole
locations onto the aileron with a marker pen or sharpened pencil.
c) Swing the pushrod and horn out of the way. Use an electric drill
and a .043" (#57 index drill) to drill four holes at the marks just
made. Use four T2.6 x 16mm Phillips head screws to mount the
control horn, just enough to establish threads in the mounting pad.
Remove the screws and apply a drop of thin CA glue with a
fine-tipped applicator, into each screw hole to harden the threads.
Remount the control horn with the screws and tighten them firmly.
Repeat this process with the remaining control horn and the
opposite wing panel.
Remove the pieces of tape holding the
ailerons in neutral.
7) Use your transmitter and receiver to now test the ailerons.
Make any linkage and/or servo arm adjustments necessary to
achieve smooth, non-binding aileron movement.
The pushrod
locking nuts and clevis safety springs do not need to be tightened
or in place until after you have set the final surface movements,
later in this manual.
Elevator Servo Installation:
The elevator servos are mounted into each stabilizer half in much
the same way as the aileron servos were mounted in the wing
panels. Because the left stabilizer half is shown in the following
instructions, we will mount a left control horn to the elevator. For
the following steps you will need four T2.6 x 16mm Phillips head
screws and one left and one right heavy-duty control horns. You
will also need two of the #4-40 pushrod and clevis assemblies. You
will need your two elevator servos, with the rubber grommets and
eyelets installed, and the mounting screws that came with the
radio system.
1) Feed the servo lead through the servo bay opening and out of
the root rib. Position the servo into the servo bay with its output
arm spline forward toward the leading edge of the stab. Hold the
servo in this position and mark the four mounting screw locations
10