D Vs. Y wind motors... How does lower timing on D wind improve its performance?.....

[msundsd5]

I see comments advising D wind motors run better when timing is turned down, What is the logic behind that? Lower timing, better Tork? I'm trying to enhance my knowledge of motor performance so that I can find the right combinations to make my boat go fast and stay on the water so this is another aspect i am seeking further education on.

So if I have a Seaking 180Amp Esc where the standard timing is 15 degrees (standard out the box), if I lower it to 5degrees will the motor performance pick up?

[Luck as a Constant]

it has to do with how the motor is wound and efficiency. performance wise, you may or may not see a slight improvement, but generally timing changes don't yield significant speed increases. i say :generally" because i don't want to say its never happened on here. just my experience. a timing change in the rite direction will def make your motor run more efficient (cooler) and put less stress on your electronics. and the wrong direction will obviously do the opposite.

[Luck as a Constant]

as far as what i know about d wind motors is this ( and i could be wrong ), D wind are more efficient in things like robotics where the motor needs to spin both forward and reverse equally well. Y wind are the opposite and spin one direction much more efficiently and not so much the other.

Disclaimer : I am not 100% sure on my statements

[ManuelW]

as far as what i know about d wind motors is this ( and i could be wrong ), D wind are more efficient in things like robotics where the motor needs to spin both forward and reverse equally well. Y wind are the opposite and spin one direction much more efficiently and not so much the other.

Disclaimer : I am not 100% sure on my statements

this is definitely wrong...

regards,
Manuel

[Fluid]

The D wind motors do not require much timing advance due to the way each stator is energized as the rotor magnets approach. The Y wind motors require significant timing advance for max efficiency due to the late energizing of each stator. The D motors are preferred where the application requires running in both directions. In spite of lots of "theory", high amp testing shows that either wind will deliver about the same power if they are the same size and Kv.

The D motors should use between zero and 4 degrees advance, more just adds heat. The Y motors run best between 10 and 20 degrees - the higher the amp draw the more advance is needed. Too little advance with Y motors means reduced efficiency and increased heat buildup.



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[Luck as a Constant]

this is definitely wrong...

regards,
Manuel

Wow, thanks for clearing that up....



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[tlandauer]

Fluid,
Thank you!
For sport boating where no high amp draw is regularly encountered, is there a preferance on one over the other? I don't know why but subconciously I prefer "Y" over "D" for my kind of set up, usually running 4s on monos not more than 33'' and hydros in the same ranges.
May be a ridiculous question, perhaps I should get an update for my misinformed perception...

[Fluid]

Tim, I can't really say which is "better" for sport use. The popular Leopard motors come in both winds and I don't hear much complaint of either. Motor size (diameter and length) and Kv are more important IMO. That said most of my sport boats have Y motors in them...



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[tlandauer]

Tim, I can't really say which is "better" for sport use. The popular Leopard motors come in both winds and I don't hear much complaint of either. Motor size (diameter and length) and Kv are more important IMO. That said most of my sport boats have Y motors in them...



.

Thanks again Fluid!

[Luck as a Constant]

Makes me want to try my 1515 on 18 degrees timing.


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[TRUCKPULL]

Makes me want to try my 1515 on 18 degrees timing.

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And what setup are you running at 250A and higher???

Larry

[Luck as a Constant]

And what setup are you running at 250A and higher???

Larry

I'm not sure I understand?


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[TRUCKPULL]

I'm not sure I understand?
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I am thinking a 2S setup at 250A plus = 18 degrees timming.

I run my 2S setup 210A at 14 degrees (1515/0.5Y)

Larry

[kevinpratt823]

Fluid,
Thank you!
For sport boating where no high amp draw is regularly encountered, is there a preferance on one over the other? I don't know why but subconciously I prefer "Y" over "D" for my kind of set up, usually running 4s on monos not more than 33'' and hydros in the same ranges.
May be a ridiculous question, perhaps I should get an update for my misinformed perception...

I'm not sure how true it is, but I have read more than once that a Y wind is a little easier on ESC's, that is mainly why I lean in that direction. But there are several people more experienced than I, like Fluid and some others that tell me that the KV and size is what selection should be based on more than wind.