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Brushless Motor Construction Discuss design and construction of custom Brushless motors

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Old 07-02-2010, 01:08 AM   #1
roberted5r/cnut
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Default Need advice on winds for Kv

I'm going to do a CDrom wind on a GBv™ 22.7mm Brushless Outrunner Kit from gobrusless.

I understand how to wind it but don't know how many turns or winds to get the right Kv rate.

If anyone has built this motor could they reply with some specs with respect to prop size,effeciency and thrust.

thanks,Robert
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Old 07-02-2010, 05:10 AM   #2
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Suggest you look at the StrongRCMotors and page down and look at the winding chart.
http://www.strongrcmotors.com/Instru...ng%20Motor.htm
It's essentially the same motor.

Here's my few winds experience:
GBv: 15T/24g newbie wire - Y
KV with faux prop:
1767/1773/1774/1770 – Pretty good consistency.

GBx: 25T 26g newbie - Wye (GBx uses the same stator but has more room front to back).
10350/9.86v=1050KV

I also tried this and still fly it on a small stick plane with success:
GBv: 35T / 28g newbie Y = 750KV (x 1.73 > 1300KV)
10890/7.91 = 1376 delta measured
15870/11.56 = 1372 measured
I terminated it delta and fly it with an GWS 8x4 HD on 3S.

You can only get 2 layers on the GBv or you end up rubbing on the can. That's why I tried the high wind # of 28g. You can put a tiny spacer in there and maybe get 3 layers of fatter wire (26, maybe 24) in.

Don't have efficiency or thrust data. There used to be a discussion forum with that data at GoBrushless but I couldn't find it. It wasn't very active anymore.
Have you seen this thread?
http://www.rcgroups.com/forums/showthread.php?t=878258

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If you're going to learn to fly them, you have to learn to fix them.
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Old 07-15-2010, 03:09 AM   #3
roberted5r/cnut
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Default

Originally Posted by flydiver View Post
Suggest you look at the StrongRCMotors and page down and look at the winding chart.
http://www.strongrcmotors.com/Instru...ng%20Motor.htm
It's essentially the same motor.

Here's my few winds experience:
GBv: 15T/24g newbie wire - Y
KV with faux prop:
1767/1773/1774/1770 – Pretty good consistency.

GBx: 25T 26g newbie - Wye (GBx uses the same stator but has more room front to back).
10350/9.86v=1050KV

I also tried this and still fly it on a small stick plane with success:
GBv: 35T / 28g newbie Y = 750KV (x 1.73 > 1300KV)
10890/7.91 = 1376 delta measured
15870/11.56 = 1372 measured
I terminated it delta and fly it with an GWS 8x4 HD on 3S.

You can only get 2 layers on the GBv or you end up rubbing on the can. That's why I tried the high wind # of 28g. You can put a tiny spacer in there and maybe get 3 layers of fatter wire (26, maybe 24) in.

Don't have efficiency or thrust data. There used to be a discussion forum with that data at GoBrushless but I couldn't find it. It wasn't very active anymore.
Have you seen this thread?
http://www.rcgroups.com/forums/showthread.php?t=878258
Thanks,
I'm going to try 15-20 winds,the most I can get on in 2 layers and see what happens.
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