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Old Jan 24, 2015, 10:06 PM
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Rewind iPower GBM4114-120TGimbal Brushless Motor

I have this motor, which was sent me a gift, along with others for Jack. (Thanks a lot)
It comes without wire and according to their tread:
http://www.rcgroups.com/forums/showthread.php?t=1922512

Has 120Turns, Delta to 29.64 Kv.

This motor can be wired with 18 turns delta HP AaAaBbBbCcCc 23.5 AWG wire.
For this I occupy six wires 108 inches.
That according to TC 7.1 (not yet available)
give me a Kv of: 395, Rm 68.3 milliohms.

Once completed, the measured Rm was 61milliohms

Delta Termination
For Delta termination:
Start A (Red) - End B (blue),
Start B (Blue)- End C (green),
Start C (Green)-End A (red)
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Old Jan 25, 2015, 12:32 PM
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Jack
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Nice work, Manuel!

The original motor weighed 140g with the arms well filled, I think you will have a similar weight there. So you should have a nice motor there.

I think it will good for at least 450W continuous. What prop will you test that with? I have some of the iFlight T-Style props, do you want some of of those for testing?

T-style Carbon Fiber Prop - http://www.iflight-rc.com/iflight-t-...w-ccw-set.html

It is not real clear but the prices there are for one pair of props, one each CW and CCW.

Jack
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Old Jan 25, 2015, 01:53 PM
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Thanks jack.
I have 16x5.5, 15x5, 14x4.7, 4,5,6slipo.

Regular APCe prop. 15x4, 15x8,

I believe that this is more than enough.
Thank you very much.

I hope that works well in the range of 450 watts.
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Old Jan 25, 2015, 02:25 PM
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Jack
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And do you have a prop adapter for that motor too? I think that motor has the four holes in a 12 x 12mm square pattern, right?

If you need a longer shaft so that you can have a stub shaft to locate the T-Style props on let me know, I can send you one.

Jack
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Old Jan 25, 2015, 03:04 PM
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Jack.
remember, you send me other complete motor and one 4108.
I think, i have one adapter.
But I'll check.

Thanks very mush.

Actually not that you can use this motor. possibly build you a big foamy J3 60 in stile.


Manuel V.
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Old Jan 27, 2015, 09:22 PM
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Final weight:
net weight = 162.1g
with spinner= 174.3.


First test data.

no load. .53A, 12V, 5000, 416Kv/v

IF CF 14x4.7, 5s= 17.13A, 17.92V, 6240rpm, 306W,
IF CF 14x4.7, 6s= 24.16A, 22V, 7431 rpm, 531W, 80.4%NLS.

APCe 15x8, 5s= 21.19A, 17.66V, 5941 rpm, 374W.
APCe 15x8, 6s= 30.94A, 21.74V, 6939 rpm, 672W, 76%NLS. ( Over 3.5Kg thrust, in Drive calculator)

IF CF, DJI style 15x5, 5s= 20.23A, 18.5V, 6400 rpm, 374 W.
to 50% throttle. = 2.94A, 19.45V, 3400 rpm.

Motor warm all the way. below 100 F.
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Old Jan 28, 2015, 04:21 PM
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More test.

iCF CF 15 x 5 DJI.

5slipo.
2823 rpm, 1.87A, 21.15V, 39W. Aprox 500g, 12.83 g/W
3178 rpm, 2.54A, 21.08V, 49W, Aprox 600g, 12.24 g/W
3456 rpm, 3.02A, 21.02V, 65W, Aprox 700g, 10.76 g/W
3751 rpm, 3.87A, 20.95V, 81W, Aprox 800g, 9.87g/W
3901 rpm, 4.11A, 20.87V, 86W, Aprox 900g, 10.466 g/W.
4118 rpm, 5.02A, 20.77V, 104.26W, Aprox 1000g, 9.59 g/W.

Full throttle.
6571 rpm, 21.01A, 19.4V, 406W, Aprox 2547g, 6.27 g/W.


iCF CF 16 x 5.5 Dragon Fly

5slipo.
3178 rpm, 3.08A, 19.95V, 61W.
3396 rpm, 3.57A, 19.87V, 71W,
3551 rpm, 3.99A, 19.80V, 79W, 1/2 throttle.

Full Throttle.
6327 rpm, 23.13A, 18.96V, 438W, 92.3F.
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Old Jan 28, 2015, 09:02 PM
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Quote:
Originally Posted by manuel v View Post
Final weight:
net weight = 162.1g
with spinner= 174.3.


First test data.

no load. .53A, 12V, 5000, 416Kv/v

IF CF 14x4.7, 5s= 17.13A, 17.92V, 6240rpm, 306W,
IF CF 14x4.7, 6s= 24.16A, 22V, 7431 rpm, 531W, 80.4%NLS.

APCe 15x8, 5s= 21.19A, 17.66V, 5941 rpm, 374W.
APCe 15x8, 6s= 30.94A, 21.74V, 6939 rpm, 672W, 76%NLS. ( Over 3.5Kg thrust, in Drive calculator)

IF CF, DJI style 15x5, 5s= 20.23A, 18.5V, 6400 rpm, 374 W.
to 50% throttle. = 2.94A, 19.45V, 3400 rpm.

Motor warm all the way. below 100 F.
Beautiful! Manuel Good work!
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Old Jan 29, 2015, 06:43 AM
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That looks like a winner for sure. Are you going to fly it on something? You don't have enough of them for a multi do you? That might make a good motor for those big mapping multi that they are discussion here:

Ultimate mapping quad! - http://www.rcgroups.com/forums/showthread.php?t=1982044

Those are all focused on long duration and low energy flight and the best platforms are the ones that use bigger props at lower RPM to keep the power use down. I think, in general, they are over propping the motors to get the best duration. And you motor looks like it could handle more prop down around half throttle.

This is a two part motor right? And it is wound to this scheme?

AaAabBbBCcCc/aAaABbBbcCcC

If you look at that in the winding scheme calculator the winding factor is very good at 0.94947. You can copy and paste the scheme in in the Advanced mode and enter 22 poles to see that.

Jack
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Old Jan 29, 2015, 11:46 AM
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Thanks Crackup007.

Yes Jack this is the scheme.

Im going to try in Airplane.

comparing a stock motor vs rewinding.
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