prop spinning wrong way...

[Sobie2]

So I have an aqua craft minimono project I am ready to splash (upgraded driveline, motor and esc). The prop is spinning the wrong way. The three motor bullet connectors are all matched as are the battery to esc red/black. Motor is a 3900 outrunner and seaking 35a esc. I am hoping to just resolder the deans plug on the battery to esc connection because the 3 motor plugs are new to me I was into R/C in the 80s and early 90s.

Is this the best course of action?

Sobie2


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[Doug Smock]

So I have an aqua craft minimono project I am ready to splash (upgraded driveline, motor and esc). The prop is spinning the wrong way. The three motor bullet connectors are all matched as are the battery to esc red/black. Motor is a 3900 outrunner and seaking 35a esc. I am hoping to just resolder the deans plug on the battery to esc connection because the 3 motor plugs are new to me I was into R/C in the 80s and early 90s.

Is this the best course of action?

Sobie2


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No sir do not reverse the battery polarity!!
Switch any two motor leads to reverse rotation regardless of their color.

[stu22]

Reversing the battery polarity will more often than not release the magic blue smoke from the ESC. This is true for pretty much all ESCs, brushed or brushless. (or I should say I have never had one survive when using banana plug packs.)

[bhorowitz]

Question for Doug,
I am totally new to fast electric boats. I have no knowledge of brushless systems. Am I correct in assuming that these brushless motors are like a 3 phase ac motor. I saw your response to Sobie2 about changing motor direction and that's what I do in 3 phase ac machinery. Milling machines ,lathes etc.
Bob Horowitz

[T.S.Davis]

Yes sir. 3 phase. Like a fire pump motor.

[bhorowitz]

So, polarity going into the esc matters, on the output you just hookup to get correct rotation. Maybe you can help me with timing. I'm setting up a Zippkits Minisprint. 4400kv motor, 60 amp. Seaking esc., and 2s battery. The motor is the Zippkits outrunner. What timing value should I use and how do you figure it out?

[Fluid]

Don't know the Zip motor, but most out runners will run well with 5 to 10 degrees advance.


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