19
insert the short end into the hole in the switch.
Apply silicone
adhesive (or double-sided foam servo mount tape) to one side of the
switch and insert the wire through the hole in the fuselage, pressing
the switch firmly to the radio tray. Make another 90
O
bend in the wire
outside of the fuselage, giving you a small "handle" to pull and push
when activating the on/off switch. Besides looking neat, this method
provides protection to the switch from dirt, debris and exhaust.
RADIO CHECK: All servo, switch, and battery connections to the
receiver are now made. We find it easiest to leave the aileron
Y-harness plugged into the receiver aileron channel receptacle all
the time, with the two connecting ends hanging loose. Plug your
two aileron servo extension chords into the two loose ends of the
Y-harness and mount the wing to the fuselage. Turn the radio
system on and check the functions of all the controls. Make sure
they are moving in the right direction! Thousands of R/C airplanes
have crashed over the years because the servos were moving
the wrong way! Also make sure all the servos are centered and
working perfectly, without any binding. Correct any such problems
now. With everything checked and working, now is the time to set
the initial control movements.
CONTROL MOVEMENTS
This is an important section of this manual.
After flying your
EXTRA 300XS for awhile, getting used to its characteristics, you
will likely change the control throws to suit your style of flying. But
you have to start somewhere and this is where you begin. These
movements provide the EXTRA with very smooth control inputs
without the immediate need for exponential. We suggest starting
out with these movements as your low and high rates. You can
easily play with more control throw after you become comfortable
with the airplane, especially for 3-D type flying.
SURFACE
SUGGESTED THROWS
AILERONS:
LOWRATE:
7/8" UP
- 7/8" DOWN
HIGH RATE: 1-1/8" UP - 1-1/8" DOWN
ELEVATORS: LOW RATE: 1" UP
- 1" DOWN
HIGH RATE: 1-1/2" UP - 1-1/2" DOWN
RUDDER:
2-1/4" RIGHT - 2-1/4" LEFT
Remember:
Control surface movements should always be
measured at the widest point of the control surface.
SAFETY ISSUE: After centering all the servos and setting the
control surface throws, make sure each R/C link has a short length
of fuel tubing in place to prevent it from coming disconnected from
either the control horns or the servo output arms. Also be sure
you have tightened each of the 4-40 hex nuts tightly against all
threaded R/C links, locking them in place.
DECAL APPLICATION
The decals provided with your kit are reproductions of some of the
insignias that are typically seen on full-scale aerobatic airplanes.
They are not intended to be a complete set of markings to
duplicate one particular EXTRA 300XS. However, we think you'll
agree that when applied to the SIG EXTRA as shown on the box
label, they look very realistic and believable. Feel free to use all or
only some of the decals in different locations as you see fit.
The decals are made of adhesive-backed mylar, they are NOT
water activated transfers. These decals are not die-cut and need
to be cut from their sheets with a sharp #11 blade or good pair of
scissors. Trim as close to the image as possible.
❑
6) Unbolt the clear canopy and clean it with window cleaner.
Dry it completely with a soft cloth and avoid handling the inside
surface. Set it aside for a moment. Now use 220 grit sandpaper
to lightly scuff the perimeter areas of the canopy base that
actually contact the clear canopy.
Wipe off excess dust with
alcohol. Mix a small amount of epoxy glue and smear a thin layer
of glue on the sanded area. Carefully place the clear canopy back
on the canopy base and put the bolts back in. Use alcohol and a
paper towel to wipe off any excess glue. If necessary, use some
pieces of masking tape hold the clear canopy tight against the
base and fuselage while the glue dries.
RADIO INSTALLATION
With all the servos now installed, all that remains is the installation
of the receiver, battery pack and switch.
RX BATTERY PACK: The single heaviest unit of the radio system
is the battery pack. This means that you can, if needed, locate the
batteries wherever they are required in the airplane to help achieve
the correct balance point. Be sure to wrap the battery pack in foam
rubber and use rubber bands or tie-wraps to secure it to the model
structure so that it can't move around in flight.
RECEIVER: Wrap the receiver in foam and use rubber bands or tie-
wraps to secure it in the fuselage. Note that the EXTRA has an
internal receiver antenna exit tube already installed inside the
fuselage. It's the clear plastic tube running along the right side of the
fuselage, extending from the radio tray all the way back through the
fuselage, exiting just ahead of the tailwheel assembly on the bottom.
Slide your antenna into this tube when installing your receiver.
SWITCH: The switch can be mounted onto the fuselage side or
internally. We prefer an internally mounted switch. We mounted
ours onto the radio tray, using a length of music wire to activate the
switch from the outside. This is simple to do. Just drill a small
diameter hole in the switch lever to fit a piece of .045 music wire.
Drill an exit hole in the side of the fuselage, lined up with the
switch/wire location. Make a 90
O
bend in one end of the wire and