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-   -   Multi-motor setup question. (https://www.wattflyer.com/forums/showthread.php?t=37030)

Firestem4 07-18-2008 04:11 AM

Multi-motor setup question.
 
Hello. I was hopign someone could help me. I've asked around and felt i should ask in here to get a definitive answer.

How coudl you set up twin or quad-motor (brushless in/outrunner), 4 esc's, 2 to 4 batteries, on one channel? Is that possible?

I'm really into twin prop and possibly 4 prop (stratofortress.) or twin/4 ducted fan planes. (jetliner etc)

Dorsal 07-18-2008 05:18 AM

1) Setup with 4 identical motors AND 4 identical ESCs
2) Connect 2 ESCs to a Y-connector (let's say this is the left wing)
3) Connect the other 2 ESCs to a Y-connector (let's say this is the right wing)
4) Connect the male plug from both Y-connectors to a third y-connector and plug that into your throttle channel on the receiver.
Note:
AS LONG AS all 4 ESCs are identical, the output voltage from each should be within 0.1 volt of each other, so there will be no problem using the BEC circuit from all of them at once and you won't need to remove any red wires. Use a voltmeter to verify the outputs, it is important, as this will only work if the voltages are well-matched. Otherwise you WILL ruin at least one ESC.
5) Connect an identical battery to each ESC

Bub Steve 07-18-2008 05:50 AM

1 Attachment(s)
Dorsal""ESCs are identical, the output voltage from each should be within 0.1 volt of each other"" are the cheaper ESC's more likely to be off more that that?on my twins I've never been able to get mine to match up and always have to cut the one red one out to get them right, I've been using Tower-pro 25ESC's and they don't work well together, thanks for the info my bub, steve

Firestem4 07-18-2008 06:23 AM

Thanks so much Dorsal!

Dorsal 07-18-2008 07:49 AM

stevecooper, I've never really tested beyong the 2 twin setups that I have. I run Castle Creation ESCs on both of them (luck of the draw, really) and the output voltage differential was 0.02v on one and 0.03v on the other. A tech at Castle told me about the 0.1v threshold number so I was just looking to stay below that. I've got some pairs of HC ESCs (Turnigy 40A and Tower Pro 18A), so tomorrow I'll hook them up and see what I get.

Bub Steve 07-18-2008 11:13 PM

Dorsal::I was gonna use those HC 18ESC's on my new twin scratch A-26 look'in plane, My other twins got the house brand HC 25 ESC's and they did'nt like share'in either, that info will be a big help on my new twin, bub, steve


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