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Digital Trims
The ParkZone 4-channel 2.4GHz DSM2 transmitter features
digital trims on all controls to make fine adjustments. Center the
control surfaces using the trims. If there is not enough electronic
trim available, it may be necessary to adjust the loops in the
control linkages to center the surfaces.
Transmitter Dual Rate Function (RTF Only)
The 4-channel 2.4GHz DSM2 transmitter included with the J-3
Cub features dual rate capability. The default setting is high rate.
To access the low rate function, simply press IN on the right
gimbal. The LED light on the transmitter face will begin to blink,
alerting you that the transmitter is on low rate. To return to high
rate, simply push in again on the right gimbal.
Note: ParkZone STRONGLY recommends using the
LOW RATE setting for conducting the first flights
of your J-3 Cub.
Receiver Control Unit Description,
Arming and Motor Control Test
The receiver installed on your J-3 Cub is a lightweight
combination of main motor electronic speed control, servos and
Spektrum DSM2 compatible receiver. The receiver unit is also
equipped with a status indicator LED.
Before each flight ALWAYS turn the transmitter on before con-
necting the flight battery to the receiver unit. Never connect the
flight battery to the receiver unit before powering the transmitter
on first. After each flight, always disconnect the flight battery
from the receiver unit before powering the transmitter off.
Note: The only time you should connect the flight battery to
the receiver unit before powering the transmitter on
is when you are binding the receiver of the receiver
unit to the transmitter. Please see the Transmitter
and Receiver Binding section of this manual for more
information.
The following checklist contains the steps you must follow to
ensure proper arming and operation of the receiver unit, as well
as proper motor response.
• The throttle stick MUST be set in the lowest possible
position, and, for most transmitters, the throttle trim must
also be set to the lowest possible position in order for the
receiver unit to arm. If this is the first test flight, or a test
flight following repairs, you should also center the rudder,
aileron and elevator trims.
• When the status LED on the receiver becomes solid red,
the receiver unit is initialized and ready for flight. Also, as
long as you had the throttle stick in the idle position and
the throttle trim in the lowest position during the
initialization process, the ESC/motor will now be armed.
Use caution as the propeller will now spin with throttle
stick input.
Note: If the status LED of the receiver does not become
solid red, please review the following.
• If after blinking red the status LED becomes solid red, but
you have no control of the motor, you have a positive Radio
Frequency (RF) link between the transmitter and receiver,
but the throttle stick and throttle trim may not be set to
