twin wiring.

[urbs00007]

refresh my memory please. running twin 1527's with castle 240's and castle bec. bec is wired into one esc. that bec gets plugged into batt channel in receiver . the 2 esc's reciever plugs need to have red wires disconnected , then plugged into y- connector then plugged into throttle channel. is that right?

[boilo56]

You are right! No red wire at the ESC's plugs. Castle BEC plugged in Batt channel and ESC's in the channel 2!

[urbs00007]

You are right! No red wire at the ESC's plugs. Castle BEC plugged in Batt channel and ESC's in the channel 2!

thanks

[TRUCKPULL]

You do not have to disconnect both red wires on the ESC's
Just disconnect the red one on the "Y" harness at the plug that goes into the receiver.
That way you can still program your ESC by using the plug that connects into the "Y" harness.

Also you can wire your ESC's so that both ESC's see 2P
This will stop the battery on the outside motor getting pulled down more then the inside.
This is done by connecting the red wires (battery +) on the ESC's together.
The black wire on the ESC's (battery -) need to have a plug between them.
This is needed because the ESC's have to be disconnected from each other when programing or binding the radio to the ESC's

Larry

[urbs00007]

You do not have to disconnect both red wires on the ESC's
Just disconnect the red one on the "Y" harness at the plug that goes into the receiver.
That way you can still program your ESC by using the plug that connects into the "Y" harness.

Also you can wire your ESC's so that both ESC's see 2P
This will stop the battery on the inside motor getting pulled down more then the other.
This is done by connecting the red wires (battery +) on the ESC's together.
The black wire on the ESC's (battery -) need to have a plug between them.
This is needed because the ESC's have to be disconnected from each other when programing or binding the radio to the ESC's

Larry

good advice on the y-connector. dont understand about seeing 2p. I'm running a 5000ma 6-s batt on each esc. when i program or calibrate i only connect the one being setup.

[gb tiggycat]

Agree with popping the red wire on the Y harness , not on the ESC's. With twins, you can reduce pull on inside motor by using something like this.

http://www.mr-rcworld.co.uk/index.php?productID=1019. Also helps steering

[urbs00007]

everybody, thanks for the help. almost there. both esc's are programmed and calibrated. I have castle bec wired to #1 esc power leads. so when running i need to hook up #1 esc to battery first to power receiver. then i can hook up #2 esc. to battery. is this the best way? red wire is disconnected at y cable to receiver plug. also , what is the inside motor you keep mentioning ?

[785boats]

You will have to disconnect at least one of the red wires at one of the ESCs in the Y harness. I always do both.
The BEC in both ESCs are putting out voltage and are connected to each other through the red wire in the Y harness. These voltages won't be the same especially if the main batteries are discharging at different rates as they usually do in twins unless they are connected in parallel.

This from an old thread on R/C Groups.
"Apparently, there is a feedback loop in the circuit of an ESC's internal BEC. It reads it's own output voltage and when it see's this voltage get out of tolerance, it adjusts to compensate. When two ESC's are connected in parallel, if there is even the slightest difference in output voltage, it can trigger the feedback loop in the other unit to adjust it's output and then the conflict begins. One goes up, the other goes down etc. Basically they fight each other.

[TRUCKPULL]

Agree with popping the red wire on the Y harness , not on the ESC's. With twins, you can reduce pull on inside motor by using something like this.

http://www.mr-rcworld.co.uk/index.php?productID=1019. Also helps steering

This is only good on very small scale models.

Larry

[TRUCKPULL]

You will have to disconnect at least one of the red wires at one of the ESCs in the Y harness. I always do both.
The BEC in both ESCs are putting out voltage and are connected to each other through the red wire in the Y harness. These voltages won't be the same especially if the main batteries are discharging at different rates as they usually do in twins unless they are connected in parallel.

This from an old thread on R/C Groups.
"Apparently, there is a feedback loop in the circuit of an ESC's internal BEC. It reads it's own output voltage and when it see's this voltage get out of tolerance, it adjusts to compensate. When two ESC's are connected in parallel, if there is even the slightest difference in output voltage, it can trigger the feedback loop in the other unit to adjust it's output and then the conflict begins. One goes up, the other goes down etc. Basically they fight each other.

I agree if you are using the internal BEC in the ESC to power the radio.

When using a UBEC to power the radio you only have to disconnect the red wire at the radio on the output of the "Y" harness.


Larry

[TRUCKPULL]

good advice on the y-connector. dont understand about seeing 2p. I'm running a 5000ma 6-s batt on each esc. when i program or calibrate i only connect the one being setup.

The inside motor is the one on the inside of the turn.
When running an oval (racing) the outside motor loads more and will therefore pull the battery on that side down more.
Now the battery on that side has lower voltage,
Now when you want to power up and go straight the motor on one side has more voltage, and the boat wants to turn on its own.

When you wire the batteries to the ESC's in parallel (2P = 2 batteries wired in Parallel)
The voltage between the two batteries will always stay the same.

To calibrate when wired this way you must break the circuit between the two ESC's , thus the plug between the two black wires on the ESC's.

Also when wired this way - Your UBEC will put power to your radio - No mater which battery you plug in.
The hole system will also work on just one battery if you need it to.

Larry

[785boats]

It can be a problem with two BECs connected to each other even if neither one is powering the Rx. The differing voltages can cause one BEC to blow & that sometimes takes out the whole ESC. I've seen it happen.

[ray schrauwen]

It can be a problem with two BECs connected to each other even if neither one is powering the Rx. The differing voltages can cause one BEC to blow & that sometimes takes out the whole ESC. I've seen it happen.

This is very true.

[TRUCKPULL]

It can be a problem with two BECs connected to each other even if neither one is powering the Rx. The differing voltages can cause one BEC to blow & that sometimes takes out the whole ESC. I've seen it happen.

You may be right.
I just realized that I use theses connectors to make my "Y" harnesses
They disconnect the RED wire automatically at the output of the ESC's.

Larry

[urbs00007]

twin wiring

You may be right.
I just realized that I use theses connectors to make my "Y" harnesses
They disconnect the RED wire automatically at the output of the ESC's.

Larry

how about if i remove red wires on the on the y- connectors where the esc plugs into.? this way i can use the castle link and will not need battery pack to power esc.