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VMA-J210X JU52 Trimotor 64in ARF ECS - Electric Power - Wiring
Question: My VMAR VMA-J210X JU52 Trimotor 64in ARF ECS uses three electric motors. How should I wire these up so that I can control them from the single throttle channel on my receiver?
 
Answer: The simplest solution is to use our VMAX Power Pack which comes with brushless motors, electronic speed controls (ESC), battery pack, propellors etc and includes a custom made Wiring Harness Set for the power and control system. The Power Pack for the VMAR JU52 Trimotor is #VMM-J210XPP1.
 
If you have your own motors, servos, speed controls etc that you intend on using in the VMAR JU52 Trimotor, the manufacturer of these electric components is your best bet for advice on operating in a Triple Power configuration. The Wiring Harness Set for the VMAR JU52 Trimotor (#VMA-J210XWHS) is available as an aftermarket accessory and in most installations will make it much easier to work with the VMAX Power Module, third party motors, speed controls and servos.
 
If you have purchased the VMAX Power Pack for the JU52 Trimotor (#VMM-J210XPP1) please follow the installation instructions that come with the Power Pack. The VMAX Power Pack will save you hours and hours of time and greatly reduce the chances of making an expensive mistake.
 
If you are using third party power components, follow their instructions. In the absence of specific information from the manufacturer here are some general tips that may assist you. Remember, without specific information from the supplier of your Motors and ESC, you run the risk of doing something wrong and such booboos are usually expensive. Use our tips with this in mind. We can't verify that these tips will work with third party equipment and strongly encourage you to obtain information from the manufacturer of your Motors and ESC.
 
a) Use three idential Brushless Motors and three identical Electronic Speed Controls (ESC). Each motor should have its own speed control. (see footnote below)
 
b) Connect each ESC to a Brushless Motor using the color coded wire as a guide. Test and ensure that the motor turns in the direction expected and that thrust is aft of the motor.
 
c) Make a power Y3-connector to feed power from your LiPo battery to the power input leads on both of your ESC's. 
 
d) Use the power Y3-connector to connect the power input to the ESC's to a common (1) LiPO battery source.
 
e) Make a throttle Y3-connector (you can serially gang up two Y connectors). This is necessary for Triple ESC operation which assumes that you are using three motors and three ESC's.
 
For TRIPLE ESC operation use ONLY the NEGATIVE (-) Power (usually black or brown) & SIGNAL lines
(see table below) between the receiver throttle channel and the ESC's.
 
Do NOT use the POSITIVE (+) Power (usually Red) wires.  
The following table serves as a guide to common radio systems and their wiring schema and color usage. Use this table with caution. If in doubt, please defer to information provided by your radio supplier.  
 
RADIO BRAND NEGATIVE (-) SIGNAL
VRS & Futaba Black White
Airtronics Z Black Blue
JR Brown Orange
HiTec Black Yellow
f) Plug the ESC throttle control wires into the ends of the throttle Y3-connector
 
g) Plug the remaining single end of the throttle Y3 connector into your receiver throttle channel.  
 
h) Use the airborne battery pack from your radio system to power your receiver. Do NOT attempt to use power from either BEC to power your receiver. You may wish to consider using a stand alone BEC such as that from Western Robotics to power your radio system but do NOT use the BEC's that are a part of many ESC's. They will not work in a triple power configuration.
 
i) Select suitable propellers for your motors and your speed controllers. The three props should be identical. Prop selection is vital with brushless motors. Overloading the motors and ESC by using the wrong prop can get very very expensive in a big hurry.
 
j) Verify that you can control the RPM of the motors via the receiver and that they produce similar RPM and thrust throughout the throttle range.  
 
Footnote: There may be some triple ESC's that enable you to control three Brushless motors from one ESC. These eliminates the need for a second and third ESC and may make the installation of third party components simpler. If you are using a triple ESC, ensure that you follow the manufacturers instructions regarding wiring and operations.
 
 
 
Article ID: 7381