DYS BE1806 Thrust Tests - Page 47 - RC Groups
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Jul 17, 2017, 02:21 AM
Brisbane, Australia
NFE, from some notes I made on these motors:

"Was wound dLRK using 14-15 turns, using 2 strands 0.25mm, delta terminated, measured 2207Kv.
Rewound LRK using 11 turns 1 strand 0.5mm, wye terminated, 3220Kv. The stator could fit 14 or 15 turns of 0.5mm wire.
Motors run great 3S driving GF4045 BN, run cool and 650mAh battery just a bit warm, perform well."

The DYS might have a different number of turns for 2300Kv. Looks like I could have used thicker wire (which gives better efficiency) but probably didn't have any at the time. I have found so far that the rewound motors always run cooler and draw less amps for the same power. If you have the time to rewind, its well worthwhile.

Quote:
Originally Posted by nagas
Looking at the price of those Brother Hobby motors, they are about twice the price of the DYS.

I guess you pay a premium for the latest tech.

I didn't realise how fast things had developed in the racing world. But then it is always at the cutting edge, win it or be a loser I guess lol.
Yeah motors like that are aimed at dedicated racers I think. I wouldn't mind paying more money for the cheaper LESS powerful motors if they would wind them neatly with a single strand and fit top quality bearings so I don't have to rewind my own In fact I would like that.
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Jul 17, 2017, 10:34 AM
Registered User
LRK, single strand and wye termination was also my plan. I really appreciate you sharing this cause I don't mind repeating and testing the process with a few different winds. Now I have a good starting point! I just thrust tested some old emax pm1806 last night with absolutely horrible performance. They are a good candidate for a learning experience. This old post by Alex also looks like it would be fun to do the math on if I can find the time to both rewind and do the math. https://www.rcgroups.com/forums/show...2&postcount=24
Last edited by NotFastEnuf; Jul 17, 2017 at 12:46 PM.
Jul 17, 2017, 10:18 PM
Registered User
Just thought I'd drop an update on this. .. started practicing removing stators from old motors I'm never gonna use again, cooked motors, and one previously decent emax 1806. Not a single successful event without trashing the laminations. There's a few tricks to do this correctly, and a lot more ways to screw it up. After an evening of failures, the brother hobby motors don't seem so expensive anymore. Lol. Could I eventually get the knack for doing this... I'm sure I could..... I'm probably just not going to put In the necessary trail and error time. Ian444 - I respect your seemingly unending ability to end up in many of the same corners of the hobby that I find myself in - and to be there with more success than myself. I tip my hat to you sir.
Jul 18, 2017, 01:24 AM
Brisbane, Australia
Don't worry about the math too much. If you have say 14 turns on a 2300Kv motor and want say 3000Kv, then it's 2300/3000 x 14 = 10.7 turns so make it 11. Then find the thickest wire you can comfortably fit in there. Stator removal link here. That's all you really need to know.

In fact I tip my hat to you, your work and creativity is inspiring
Jul 24, 2017, 01:15 PM
Registered User
Well I thank you on both accounts, both for the compliments and the link. You do some excellent write ups. I may go for it after all now. Your instructions for tube frames also are compelling me to want to give that a try as well! Looks like a winning combo!


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