Need a Huge 63-74 Outrunner Rewound

[sikeston34m]

Hi Takedown,

I just got your PM then I noticed your thread. I think I'll just respond here.

You're right. I'm not really interested in rewinding motors for people. For me, I find it fairly difficult. It's not so hard to actually rewind an outrunner, provided that NO mistakes are made.

What I found to be one of the hardest things, is removing the stator from a motor that is already built. Some Manufacturers use Adhesives similiar to Loctite that require ALOT of heat before they even think about letting go. I baked one in the oven at 500 degrees before I could get the stator off. This melted all the wires together and removed most of the protective coating from the stator.

If you are interested in rewinding a few motors yourself, I do have detailed instructions and diagrams on either DLRK style that you want to go with. Both in Delta Termination and Wye Termination.

On what influences KV in a motor. The larger the Diameter of the stator and the longer the stator, both tend to produce a lower kv motor.

To compensate for this, fewer turns need to be used. This opens up room for more parrallel strands of winding wire to be used. Example: If you remove 10 strands at 20 turns then you can go back using the same Ga. wire for 10 turns using 20 strands.

The goal should be to get the stator poles as full as possible. This makes for a motor that is most efficient and results in cooler temps with less copper loss.

By rewinding, a motor can be changed to perform very different than it once did, BUT.........you also need to consider what you want it to be, then shoot for that.

In raising the kv, using fewer turns and more strands, the internal resistence of the winding is greatly reduced creating a larger load for the ESC to handle.

To achieve a 600kv rating with a 52/40 sized stator is going to be pretty hard. The end result will be beyond your battery's discharge capability and probably beyond your ESC's ability to deliver what it wants. That's a huge motor man.

A custom AXI 4130 using 6 strands of 22Ga. wire and 4 turns makes for a motor that is in the 500 - 550 kv range. This motor has the Wye termination.

The Wye termination makes 1.73 times the torque that a Delta wind does AND makes 1.73 times LESS KV. The amp draw is also 1.73 times LESS than a Delta Wind with the same amount of turns. The Wye also starts better and runs cooler in my opinion. With that being said, this is why I decided to create a 4 turn motor.

It is a hoss! The starting amperage is huge also. Toward the end of the charge, the ESC is getting on the LVC too soon because of the huge amperage (125 - 150amps!) it takes to start this bad boy directly driving the diffs. Consider all of this before you put alot of time into something that isn't going to work.

The 52/40 size stator it TOO big for what you're trying to do. (+ it will explode the diffs). I'm with Linc on this one. Choose something smaller. AXI does make GREAT quality. They use Neo magnets, which is very important when you put one outrunner up against another to compare.

Alot of companies don't use Neo Magnets. This cuts their performance and makes them run hotter.

In cooling this type of setup, think Aluminum for mounts and airflow. I like AXI also because they sell a bolt on fan for "extreme" applications.

[lincpimp]

You heard the man! Now buy an axi, and stop pissing in the wind!

I can safely say that rewinding a motor looks like a fun job, just not one that I would ever do. I have a feeling that if you step up to a better motor, you will see the increased power and effecientcy, and be very happy.

[Takedown]

Hey guys I have a new idea... What if I run dual smaller 42/50 600kv outrunners? They only draw 43a each continious and it seems like a smart idea. One motor for the front diffs and one for the rear diffs. I saw a buggy conversion on youtube like this and it had some real power with really small outrunners running each diff. If I went about doing this I would run it on one ESC on 5s lipo? Im guessing this isnt a very smart idea?

[Takedown]

Another option of mine is to go with a smaller motor such as this- http://www.hobbycity.com/hobbycity/s...idProduct=2101

Im guessing thats plenty of power on 5s lipo. And I know my hacker will be able to handle it. So is this the way to go?

[Arct1k]

you couldn't run this with one esc as the motors will get out of sync and the esc will toast.

I believe two motors / one esc has been done but with a transmission such as the emaxx so that the motors stay in the same orientation. Even then this is hard to do IMO as no two motors have identical kv's.

[What's_nitro?]

Hey did you miss this one? http://www.hobbycity.com/hobbycity/s...idProduct=4907

[Takedown]

Nitro: I already tried that motor in my warhead and it didnt have enough power for me. I think the 50-65 350kv is the only way to go I guess...

[Takedown]

Well i think I know what motor I have my mind set on now- http://www.hobbycity.com/hobbycity/s...idProduct=4914

It has a good kv rating and looks pretty promising.

[Takedown]

God I cant choose. I would like this- http://www.hobbycity.com/hobbycity/s...idProduct=4572

But I would like to get a little more kv out of it. Back to sike...

[What's_nitro?]

That thing would chew up your truck on 10S!

[lincpimp]

Is there any reason you do not want to buy the axi 4120 I linked to?

Price? Desire to keep HobbyCity in business, Had a bad childhood experience with an axi?

[johnrobholmes]

Originally Posted by Takedown

Nitro: I already tried that motor in my warhead and it didnt have enough power for me. I think the 50-65 350kv is the only way to go I guess...

Sounds like your batteries are too weak. You don't need a 2 pound motor.

[brushlessboy16]

takedown, all this conversation leads me to beleive that u need more cells, think about it...
1st off more voltage will cut the amp draw of the batteries
2nd it will allow you to run your snail's pace Outrunner
3rd, it will be more efficient becuase the esc isnt heating up trying to draw 100a from a battery that cant handle it.
4th you will gain even more efficiency by not hauling around a 2 pound motor

hey lincpimp, hes not saving UH-I am! Im getting a 55-55b, 5s lipos, and a charger from them for my Raze! :P

[brushlessboy16]

Originally Posted by johnrobholmes

Sounds like your batteries are too weak. You don't need a 2 pound motor.

dang john you beat me to it!
lol

[Takedown]

I think I'll go for the Towerpro 64-63 259kv is what I'll get. If and when I get it and its to slow then Ill concider running more voltage.