Horizon Hobby PYTHON User Manual
1
2-CHANNEL DIGITAL PROPORTIONAL RADIO CONTROL SYSTEM
INSTRUCTION MANUAL
II. COMPONENTS AND SPECIFICATIONS
Your JR Python Radio includes the following items:
Transmitter ………………………………………………… NET-112L
2-Channel Receiver ………………………………………… NER-102
2 Servos ……………………………………………………… Z250 x 2
Accessories ………… B.E.C. Switch Harness and Servo Accessories
T
RANSMITTER
SPECIFICA TIONS: P
YTHON LED
Antenna Output……………………………………………… 500mW
Frequency ………………………………………………… 27/75 MHz
Modulation ………………………………………………………… AM
Power Supply ……………………………………………… 9.6V D/C
Dimensions …………………………………… 8.15" x 7.00" x 3.35"
Weight …………………………………………………………… 13 oz
R
ECEIVER SPECIFICATIONS: R102
Intermediate Frequency …………………………………… 455KHz
Power Supply ………………………………………… 4.8V-8.4V D/C
Dimensions…………………………………… 1.93" x 1.50" x 0.827"
Weight …………………………………………………………… 1.3 oz
S
ERVO SPECIFICATIONS: Z250
Torque ………………………………………………… 49 in/oz. (6V)
Speed …………………………………………………. .19 sec/60° (6V)
Dimensions …………………………………… 0.73" x 1.52" x 1.32"
Weight …………………………………………………………… 1.5 oz
BB ……………………………………………………………… Bushing
Motor …………………………………………………… 3-Pole Ferrite
III. R/C SAFETY PRECAUTIONS
For safe and reliable performance of your R/C model, please carefully read and follow these guidelines:
1. Radio control models are not toys. They are capable of inflicting serious injury to people and property. Use caution at all
times when operating your model.
2. You are responsible for the safe operation of your R/C model.
You must properly install, test, and operate your model with a
clear sense of that responsibility. Do not take risks that might
endanger yourself or others.
3. Running an R/C car in the streets is very dangerous to both
drivers and models. Avoid running your model in areas
occupied by full-size automobiles. To locate areas where you
can safely operate your model, contact your local hobby shop
for R/C tracks or clubs in your area.
4. When running an R/C boat, keep it away from any swimmers,
full-size boats, or wildlife. Also, watch carefully for fishing
lines that can entangle the propeller.
5. Before operating your model, make sure your frequency is
clear. If someone else is operating on the same frequency, both
models will go out of control, possibly causing damage to the
models, as well as others.
6. If at any time while operating your R/C model you sense
abnormal model functioning, end your operation immediately. Do not operate your model again until you are certain
the problem has been corrected.
CA UTION: Control of your model is impossible without sufficient voltage for the transmitter and receiver. A weak transmitter
battery will decrease your range of operation and a weak receiver
battery will slow servo movement and decrease your range of
operation. Check your receiver pack voltage often to avoid losing
control of your model. When using a model that operates both
the electric motor and the receiver from the same battery
(Battery Eliminating Circuitry or B.E.C.), you should discontinue
use when the top speed sharply decreases or you will quickly
lose control of your model.
I. INTRODUCTION
Congratulations on your purchase of the JR Python
2-channel radio control set which has been manufactured and
assembled with the greatest care.
We are confident that you will be delighted with your purchase.
Please read the instructions thoroughly, noting all points before
use, in order to avoid mistakes in handling and operation.
Your NER-102 Receiver has Battery Eliminator Circuitry (B.E.C.).
The receiver gets its power from the model’s NiCad battery pack,
thus saving the weight of an additional receiver battery. NiCad
batteries from 6V-8.4V (5-7 cells) can be used safely. Higher voltage packs may damage the receiver and servos.
ATTENTION: Make sure the male and female connectors have
the correct polarity (+/–) before connecting. The servo lead and
receiver case are molded so that the lead can only be inserted
correctly. Be sure to orient the servo plug correctly for proper
insertion.
You may use a separate battery to power the receiver (such as
for some electric boats or in gas-powered vehicles). A NiCad pack
plugged into the BATT socket on your receiver will operate your
receiver. You may also use alkaline batteries with an optional
battery holder (part no. JRPA020).
If you use a mechanical speed controller, please ensure that it
has the correct connector for a B.E.C. system (red connector).
See F
IGURE A for a typical setup.
Most electronic speed controllers are set up for B.E.C. operation
and plug directly into your receiver (Function 2). See FIGURE B for
a typical setup and check your speed controller’s manual for
correct installation.
You should use the black rubber servo cushions whenever possible to decrease your servo’s sensitivity to vibration.
IV. OPERATING YOUR MODEL
It is important to learn the proper sequence for switching
ON/OFF your radio system:
BEFORE OPERA TION: Switch on the transmitter, then the receiver.
A
FTER OPERATION: Switch off the receiver, then the transmitter.
This ensures that you will always have a signal to the receiver,
and your R/C model will not operate out of control when you
turn off the transmitter.
V. INSTALLATION
C
FIGURE A– Connections to B.E.C. receiver with mechanical speed controler. NiCad
battery, speed controller and battery holder are not included in the radio set.
To Motor
To Motor
To Resistors
BEC Connector
Optional Battery Holder
(JRPA020)
JR PYTHON WITH
Z250 SERVOS
SERVO
FEA TURES
• A tight deadband amplifier ensures accurate neutral centering
• Low current drain
• An indirect drive feedback potentiometer gives additional
protection from vibration
• State-of-the-art surface mount technology (SMT)
• 3-pole ferrite cored motor for reliability
Z250 S
ERVO LA YOUT
Rubber Grommets
Servo Case
Servo Lead w/Connector
Servo Output Shaft
Servo Mounting Flange
Servo Arm/Horn
Servo Arm Retaining Screw
Servo Eyelet
Servo Mounting Flange
Rubber Grommets
TOP VIEW
FIGURE B– Connections to B.E.C. receiver
with electronic speed controler. Ni-Cad
battery and speed controller are not
included in the radio set.
2
BEC
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