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Old May 23, 2010, 10:15 AM
Dave North
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USA, CA, San Jose
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Overall, I think 26 & 24 are the gauges to stock, followed by 23 and 25. In other words, they see the most use. I keep around everything from 22 thru 28 (but I'm kind of to the point where I never use the 22. Getting too old for that).


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Old May 24, 2010, 12:34 AM
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Carmichael, CA
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Good to hear you got the stator off easy. Sounds like you're having fun... next thing you know you'll be looking for planes to put your motors in.

I've found 26 through 23 are the most useful gages to have on hand for smaller motors (16-60gm motors), 24 being my mostly used wire. I rarely use 20 and 21... just on dt750's.

Yep, you can most certainly measure Kv and Io with a logger and a no-load test. More importantly you can measure efficiency with props. If you need help understanding more about motors, or even how to use your logger just ask... I've been asking silly questions for years and still haven't learned everything there is to know about motors, but I'll be happy to share info I've learned from the motor gods.

Cheers,
Kev

[edit: Dave, are you sure it's that you're getting to old for 22, or is it the batteries are getting too hot for 22?]
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Old May 24, 2010, 11:58 AM
Dave North
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USA, CA, San Jose
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Quote:
Originally Posted by Truglodite View Post
Dave, are you sure it's that you're getting to old for 22, or is it the batteries are getting too hot for 22?
There's something to that idea. I've had to change winds on most motors over the last couple of years due to the batteries. And I can still wind down to 17 gauge (did one a while back) but with increased success in parallel, the real problem is I just don't want to put myself through the torture any more when there are easier alternatives. Part of that is aging hands.

So mostly the 22 languishes now. I'm really not seeing a lot of use for the 23 either, which is probably just coincidence.


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Old May 24, 2010, 03:45 PM
Dave North
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USA, CA, San Jose
Joined Apr 2004
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Just posted some photo notes on half-parallel. Take a glance here:

http://www.rcgroups.com/forums/showthread.php?t=1249657


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Old May 25, 2010, 09:28 AM
Jack
USA, ME, Ellsworth
Joined May 2008
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I'm finally getting a handle on using the eLogger. I got some better numbers this morning in testing on my recent 16T21AWG Delta rewind on my DAT-750.

The peak figures with a Great Planes PowerFly Slow Fly 10 x 4.5 prop is that it is pulling 22.75A, generating 231W, and turning 7,350 RPM. That was with a 4S A123 1100 mAh pack, the pack voltage started and 13.2V and pulled down to 10.1V under load.

I did another no load test on it too, that produced 12,004 RPM at 12.95V for a Kv of 927.

For some reason I didn't expect to get quite that much power out of this wind.

Jack
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Old Jun 05, 2010, 01:42 AM
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Jackerbes.

I think, your motor is 15Turn. becouse 927KV.
maybe is the first 15T wind for this motor in the thread.


Kev.

I congratulate you for making a wind of 20t, 21awg.
Today finishes a 19T, 21AWG, half parallel and it is quite difficult.
I do not think he could turn around No 20.

Now in this type of wound, I'm crusader floss all the teeth of the stator to hold wires in place.
both this engine and the AX.

Manuel V.
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Old Jun 05, 2010, 03:04 AM
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Thanks Manuel,

I've tried 20T on a few other stators with no success. I've had to punt to 18T twice. The insulation thickness varies a lot, and that one had "Komodo thin" insulation so I went for it. I might nail the wires with some rubberized CA before I fly it... used cheap wire and it's tight on the hammers.

Kev
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Old Jun 05, 2010, 06:15 AM
Jack
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Quote:
Originally Posted by manuel v View Post
Jackerbes.

I think, your motor is 15Turn. becouse 927KV.
maybe is the first 15T wind for this motor in the thread.
<snip>

Manuel V.
You might be right. I am wondering if I am counting the turns right. When a wire starts at the top of a stator arm, crosses over the bottom of the arm, and then returns to the top, that is one turn right?

So I have been counting every strand crossing the bottom as a turn including the ones that might not cross the top again because they may go off to start winding the next stator arm.

Jack
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Old Jun 05, 2010, 08:55 AM
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Error here:
**Neons** Bob
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Old Jun 05, 2010, 09:03 AM
5,200 Led Lighted Bike-Bob P.
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I did 3 motors back in October 2008. I did a pair for my USCG Hu-16 Albatross seaplane. It was 15T 23AWG wire. It uses opposite direction Master Airscrew 10X6 3 blade props. I did the other for Steve Shumates Fokker Dr-1 triplane. That had 15 T 23AWD wire with a APCe 13X4 prop. I am very happy with the power and performance of these motors. I think 15 turns has been a good performer for my use.

http://www.rcgroups.com/forums/showp...&postcount=226

**Neons** Bob
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Old Jun 08, 2010, 02:08 AM
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Mexico, BC, Mexicali
Joined Aug 2004
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Bob.
Do you know what is the KV in your 15 turns motors.


pictures of my 19 turns. three layers. 9, 7, 3.

Data.
Not load. 11.37V, 9400 RPV, 1.31A, 826Kv.
GWS 10x6, 11.69V, 8100 RPM, 13.90A, 75.5% effy. 162 watts.
APC e12x6, 11V, 6900 RPM, 19.25A, 76.3%, 46oz.
New test.
APC SF 11 x 7, 10.8 volts, 6400 rpm, 28.8A.

Manuel V.
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Old Jun 08, 2010, 08:20 AM
5,200 Led Lighted Bike-Bob P.
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Manuel,
I have not ever checked Kv on my motors. I did not know how to do it. Even now I do hands on testing in the plane after a Whattmeter and postage scale bench test. I determin the prop that works best with amps and thrust relations on the bench then I go fly them. I am evidently not technical as some are here. All I can say is I throw a large prop very well on my Fokker Dr-1 triplane and the motor runs perfect. The twin also has great power for my use with the same turns.
**Neons** Bob
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Old Jun 08, 2010, 07:04 PM
Jack
USA, ME, Ellsworth
Joined May 2008
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Do any of you guys ever use these Strong Motors Winding Terminators?

http://www.strongrcmotors.com/Winding%20Terminators.htm

I used one on my DAT-750 rewind and it worked out very nice. The hole in them is sized perfect for the bearing tube and the holes are large enough to take two or even three 21 ga. wires.

I filed the mount a little bit shorter to make up for the thickness (0.025" or so) of the terminator.

I left a short stub at the terminator and then soldered stranded wires onto the stubs. Really makes for a strong termination. A slight up angle on the stubs and the leads clear the mount nicely.

Jack
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Old Jul 02, 2010, 05:28 AM
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Joined Oct 2004
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suggestions

I've rewound three of these motors (22g 18t delta), the first one didn't work(I've only wound 9 pole one direction wraps before) and I must have
screwed up something. The next two worked but they are cutting out
at about 90% throttle. I'm swinging a 11/8 prop, the same prop I've been
using on the factory wind with no problem
It's not a low voltage cutoff, sounds more like a timing problem.

The motors have plenty of power, out performs the stock.
Suggestions
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Old Jul 02, 2010, 10:42 AM
Dave North
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USA, CA, San Jose
Joined Apr 2004
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What ESC?

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