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Old Jul 06, 2004, 11:59 AM
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Los Angeles, CA
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Gobrushless on a micro heli

I decided to start this thread in hopes to help others build their first cd-rom motor for their micro heli. I'm am by no means an expert or know a lot about brushless motors. All I know is that... I've made a tail motor, and it works great! I am now making my main motor, and wanted to share with everyone pictures and information as I build it. Feel free to comment or ask questions as we go along. And, lastly I want to thank so many of the members on this board who have helped me get this far.

Here are the specs:
DIY kit from gobrushless.com
14 turn, 26 guage, wye (star), 12 magnets, Astroflight 3 pin #520 connectors, CC Pheonix 10 ESC
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Last edited by EddieNewYork; Jul 06, 2004 at 01:49 PM.
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Old Jul 06, 2004, 12:01 PM
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Wire 1

I labeled the start wire with a piece of masking tape S1 for Start of first wire.
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Old Jul 06, 2004, 12:04 PM
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Close up shots

The mount in the pictures were made by RazorSaverMan.
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Old Jul 06, 2004, 01:36 PM
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What is included in the kit from gobrushless? Do you have to buy parts from other places?

I've checked their pages, the shaft is 3mm, too thick for the stock motor pinion.
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Old Jul 06, 2004, 02:09 PM
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Quote:
Originally Posted by glennT
What is included in the kit from gobrushless? Do you have to buy parts from other places?

I've checked their pages, the shaft is 3mm, too thick for the stock motor pinion.
Hi glennT, I had a 3mm shaft turned down at the end to 2mm, courtesy of Art Newland. An alternative method, which I plan to try on my next tail motor is to lock a 3mm carbon or metal shaft into a drill, or even better a drill press, and file the end down to 2mm.

GB Kit v1.15 Includes:
22.7mm Insulated Stator
Stock can for 22.7mm Stator
15-pk of N45 5mm X 5mm X 1mm Magnets
Stock Bearing Sleeve Holder, Stock Bearing Sleeve (not used since I opted for RazorSaverMan's mount)
2-pk 3mm X 6mm X 2.5mm Ball Bearings
Stock 3mm Shaft (not used, for this application)
3-Color Set (~25ft ea) of 26g Magnet Wire (I'm only using the red color)
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Old Jul 06, 2004, 02:45 PM
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Wire 2

Second start wire labeled S2.
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Old Jul 06, 2004, 02:47 PM
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Close ups

I tried to get them from different angles since it's kind of hard to see how the wires are routed.
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Old Jul 06, 2004, 09:57 PM
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Wire 3

And, finally the last start wire labeled S3.
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Old Jul 06, 2004, 10:07 PM
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14 turns with 26 guage completed. I'll do the magnets tomorrow.
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Last edited by EddieNewYork; Jul 06, 2004 at 10:15 PM.
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Old Jul 06, 2004, 10:19 PM
Lost in Kuwait
Marysville, Ca
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what size stator did you use? i'm trying to make a tail motor and was looking at the 20.2mm stator.
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Old Jul 06, 2004, 10:30 PM
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Quote:
Originally Posted by Arorr
what size stator did you use? i'm trying to make a tail motor and was looking at the 20.2mm stator.
I'm using the 22.7mm stator for this project, and have also made the tail motor with the same. I think the 20.2mm stator is a good choice since they're smaller thus lighter.
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Old Jul 06, 2004, 10:36 PM
Lost in Kuwait
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hehe i just realized the kit only comes with the 22.7, which is the only way to get the shaft. any suggestions on a 2mm shaft? I have absolutely no way of making a 3mm shaft a 2mm shaft :/, plus the I got the bearings with the 2mm ID
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Old Jul 06, 2004, 10:43 PM
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I guess this is just for fun? There is no cost saving at all this there?

I was thinking because the time and effort it took, it was just worth buying a Himaxx or something?

Nice project.
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Old Jul 06, 2004, 10:46 PM
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Camas, Washington, USA
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Quote:
Originally Posted by dankers
I guess this is just for fun? There is no cost saving at all this there?

I was thinking because the time and effort it took, it was just worth buying a Himaxx or something?

Nice project.
party-pooper 8^)
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Old Jul 06, 2004, 10:49 PM
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Eddie, let me know if this is out of bounds for your thread and I'll ditch it. I don't want to derail, but I thought this might be a useful idea.

I've got a 22.7mm GoBrushless setup, and didn't want to pay for one of those really beautiful mounts you got from RazorSaverMan (I'm cheap, and I like coming up with my own solutions).

The FlipIT is US $11 from Like90, and to me offers the possibility of a very low profile brushless mount.

I turned down the brass stator tube to fit the motor shaft hole in the FlipIT, and trimmed the length. Then I took one of those 3mm hardened shafts used as guides for the laser pickup on CDROM drives, and turned down the end to a tight-fit 2mm for some of those MPI pinions.

I'm fortunate to have a small hobby-size lathe loaned to me, but I think this could be done with the "poor man's lathe" (chuck the parts in a corded drill and use a metal file).

I haven't wound it yet, and need to cut the shaft, install the magnets and press the bell on the shaft, but I mocked up the final result with a little blue loctite (works very well for non-permanent mockups like this).

The heli will be one of the Fixed-Pitch Century Hummingbird scale machines, and I'm hoping the brushless will make for a nice, reliable, fly-it-and-forget-it main power plant.
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