SIG Rascal 110 Manual Update page 5

pushrod, clipping the R/C Link in the top or outermost hole in the
horn. (Again, if the clevis pin is hard to snap into the hole, open
up the hole with a 1/16" drill bit.)
c. Hold the control horn in place at the leading edge of the
aileron hinge line. Thread the R/C Links in or out to adjust the
overall length of the pushrod. With the servo in neutral and the
ailerons taped in neutral, the base of the control horn must rest flat
on the surface of the aileron with its front edge right at the hinge
line. Adjust the length of the pushrod until it is. Also, move the
control horn right or left as needed to position it parallel to the wing
ribs. Hold the horn in this position and use a pencil or sharp awl
to mark the two mounting hole locations for the control horn onto
the flap surface.
d. Rotate the pushrod out of the way and drill 3/64" dia. (or #56)
pilot holes - about 1/2" deep - into the aileron at the marks just
made. Be careful not to drill completely through the aileron!
e. Mount the control horn in place on the aileron using two M3 x
12 mm PWA Screws.
IMPORTANT: After mounting the control horns for the first time,
take them back off and 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.
11) Remove the tape holding the aileron in neutral position and
then turn the radio back on. Make sure the aileron trim lever is set
at neutral on the transmitter. Double check the movement of the
aileron both ways. If there is any binding, find the cause and
correct it now. Then, refer ahead in this manual to the section titled
CONTROL SURFACE TRAVEL to read the recommended travel
amount for the ailerons. Use the EPA (End Point Adjustment)
feature of your transmitter to yield the recommended amount of
aileron travel.
12) Repeat Steps 9, 10, and 11 for the second aileron.
SAFETY ISSUE: After centering the servos and setting the control
throws, "safety" each R/C clevis by slipping a short length of fuel
tubing (not supplied) over the clevis, as shown in many of the
photos. This will prevent the clevis from opening up and becoming
disconnected from either the control horns
FLAP HOOKUP
Unlike the ailerons, the flap servos both need to travel in the same
direction. The easiest and most convenient method to achieve
mirror image movement of the flap servos is by using a Reversing
Y-harness. Many radio manufacturers make them for their
systems. If your radio manufacturer does not make a reversing
Y-harness, another option is to purchase an aftermarket Reversing
Y-harness like the Maxx Products
used.
® "Miracle Y", which is what we
13) Make sure your transmitter's flap control (knob or switch) is set
to the "flap up" position, and then, turn on the radio system. The
correct position for both flap servo arms when in the flap up
position is for the arms to be angled back towards the wing trailing
edge approximately 45°. Reposition your flap servo arms, as
necessary, to get them in this position.
When the transmitter is set to the "down flap" position, the servo
arms should both pull towards the wing leading edge. If your down
flap motion moves the servo arms towards the flaps instead of
towards the wing leading edge, then, you need to reverse the
direction of the flap channel in your transmitter.
Activate the transmitter flap control several times to make sure the
flap servo arms are in the correct position and the flap servos are
both traveling together in the right direction. If all is correct, put the
flaps servos in the full up position (servo arms 45° towards the
trailing edge) and turn the radio off.
14) a. Tape the flaps in the full up position.
b. Connect the R/C link on one end of the 4-40 pushrod into
the outermost hole of the flap servo arm.
c. Install a Nylon Control Horn on the other end of the 4-40
pushrod, clipping the R/C Link in the top or outermost hole in the
control horn.
d. Hold the control horn in place at the leading edge of the flap
hinge line. Thread the adjustable clevis in or out to allow the base
of the control horn to rest flat on the surface of the flap with its front
edge right at the hinge line. Move the control horn right or left as
needed to position it in line with the servo arm. Hold the horn in
this position and use a pencil or sharp awl to mark the mounting
hole locations for the control horn onto the flap surface.
e. Rotate the pushrod out of the way and drill 3/64" dia. (or
#56) pilot holes - about 1/2" deep - into the flap at the marks just
made. Be careful not to drill completely through the aileron!
f. Mount the control horn in place on the flap using two M3 x
12 mm PWA Screws.
15) Remove the tape holding the flap in full up position and then
turn the radio back on. Re-adjust the pushrod length if needed to
get the flap in full up position when the servo is full up. Then move
the flap switch or knob to the full down position. Full down position
should be approximately 1-3/4" down at the trailing edge,
measured at the root end of the flap.
approximately 30° down - which would be the maximum amount
you would ever want. Use the EPA (End Point Adjustment) feature
of your transmitter to yield the recommended amount of flap travel.
16) Repeat Steps 13, 14, and 15 for the second flap. When
finished, put the wing panels together on the wing joiners so that
you can see both flaps operating at the same time. Operating the
flaps from the transmitter, make sure both flaps are coming down
evenly and to the same position. If there is any unevenness or
binding, find the cause and correct it now.
5
That equates to