❑
27) Earlier you routed the elevator and rudder servo leads up
between the servos to the top side of the radio platform. Plug
these two leads into the appropriate slots in your receiver. Also
plug your aileron Y-harness into the aileron slot of the receiver.
ESC
❑
28) Working through the opening in the bottom of the fuselage...
a) Connect the ESC to the motor, being very careful to get the
polarity correct (red to red, black to black).
b) Route the ESC's receiver connector up through one of the
holes in the front of the radio platform. Plug it into the receiver's
throttle position.
c) Mount the ESC's on/off
switch in the opening provided in the
left side of the fuselage, below the
color trim stripe.
d) Stuff the bulk of the ESC forward into the bottom of the nose
compartment of the fuselage.
The ESC does not need to be
fastened down, it can simply float free in the nose. DO NOT wrap
the ESC in foam or plastic. It must be left fully exposed to allow it
to stay cool.
BATTERY PACK
❑
29) When you are ready to fly, the battery pack is inserted
through the bottom opening of the fuselage and secured to the
bottom of the radio platform with the Velcro
®
tape that is already
mounted there. Note that the battery location is very close to the
recommended balance point of the airplane.
This means that
battery packs of different weights can be tried without adversly
affecting the overall balance of the airplane. The use of Velcro
®
makes the battery pack easy to remove for re-charging between
flights.
SYSTEM TESTS
❑
30) The completed radio and motor systems can now be
powered up and tested for proper operation.
a) Make sure your transmitter aileron, elevator, and rudder
trim levers are in neutral position and that the throttle stick is in the
full "low throttle" position. Then turn on your transmitter.
b) Install a charged battery pack inside the fuselage. Making
very sure of the correct polarity of the connectors, plug the battery
pack into the ESC. Then turn on the airborne on/off switch.
❑
31) The elevator and rudder servos should now be working.
a) Move the transmitter sticks and check for correct direction
of servo movement.
Use the servo-reversing feature of your
transmitter, if needed, to make the servos move in the correct
direction.
b) If necessary reposition the servo output arms on the
elevator and rudder servos as close to 90
O
to the servo case as
possible. Be sure to reinstall the output arm retaining screws after
making the adjustment.
c) With the radio still on and the servo arms squared up, note
the exact positions of the elevator and rudder. Adjust the V-bend
in the pushrods, if necessary, to get the control surfaces properly
centered.
❑
32) Set the wing in place on the fuselage, plugging the aileron
servo chords into the Y-harness in the fuselage.
a) Move the transmitter aileron stick and check for correct
direction of movement. Use the servo-reversing feature of your
transmitter, if needed, to make the ailerons move in the correct
direction.
b) If necessary reposition the output arms on the aileron
servos as close to 90
O
to the servo case as possible. Be sure to
reinstall the output arm retaining screws after making the
adjustment.
c) With the radio still on and the servo arms squared up, note
the exact positions of the ailerons.
Adjust the V-bend in the
pushrods, if necessary, to get the ailerons properly centered.
❑
33) Note: The propeller and spinner should NOT be installed
on the motor for this initial test - for safety!
a) Slowly advance the throttle stick on the transmitter. The
motor should start turning. If not, your throttle channel need to be
reversed on the transmitter.
b) Now make sure the motor shaft is moving in the correct
direction. When viewing the fuselage from the rear to the front - as
if you were sitting in the cockpit - the motor shaft should turn
clockwise when throttle is applied. If not, you've got the polarity of
the motor-to-esc or esc-to-battery wiring reversed.
CONTROL THROWS
❑
34) The maximum distance that a control surface moves when
you move the transmitter stick to full deflection is normally called
the "control throw" or "control travel". Most modern radio systems
allow you to adjust the control throw of the servos directly from the
transmitter. This radio feature is usually referred to as EPA, or end
point adjustment. Use this feature to adjust the control movements
for the ailerons, elevator, and rudder of your KADET EP-42. The
following control movements are recommended for your initial
flights.
RECOMMENDED INITIAL CONTROL THROWS
Ailerons: 5/16" up, 5/16" down
Elevator: 7/16" left, 7/16" right
Rudder: 5/8" up, 5/8" down
Note: These measurements are always taken at the widest part of
the control surface, at their trailing edges.
9
TYPICAL FINISHED RADIO INSTALLATION