" did I get screwed" follow up report

[donhuff]

Larry,

Soooooooo, what are you asking me? I don't understand.

[TRUCKPULL]

Larry,

Soooooooo, what are you asking me? I don't understand.

If you were building a twin race boat and had the choice between these two motors , which set would you prefer?

SSS -1200 kv 5D. the other setup a pair of TP - 1170 kv 4Y ?

I myself am leaning towards the SSS motor, more for the cost ($105 cheaper for the pair)
Although maybe the TP's are worth the extra $$ ?

I have ran TP's with no problems, I have never ran SSS motors
I guess my main question to you is the difference between "D" and "Y" winds?
Some say "D's" are AMP hogs.
Larry

[donhuff]

Lamar (my son) ran this motor last year at the spring nats. It runs pretty good.


In the picture we have the 10 pole AQ motor, an 8 pole rotor and a short ten pole rotor that I made up to test the "theory" to see if it would even run. The Kv was out of sight, but luckily, I thought about that and tried it with a 2s pack, but I still did not go FULL RABBIT with the throttle, so I don't know what the Kv actually was.DSC_0002.jpgDSC_0003.jpg

[donhuff]

Larry,


The TPs are damn good motors. They are the only chi-neese motors that I know of that use the good 200 degrees C wire. The SSS brand is probably a Leopard is disguise. Several motors are actually Leopards of a different color.

TPs are as close to a NEU as your gonna get with a cheaper motor than NEU. Size for Size, a NEU will always be stronger cause they put as much wire in them thangs as is humanly possible.

If your going to push the new boat, I'd go for the TPs. But if you plan to take it easy, the SSSs might save you some money.


(I'd buy the TPs if I were doing it)

[donhuff]

Still waiting for someone to tell me WHY they think Deltas are amp hogs!!!!!!!!!!!

I know the answer (I think) just waiting for someone to tell me ..." Because Joe Blow Dynamo sez so"

Seriously, tell me why y'all think this.

[TRUCKPULL]

Don - I do not know if this is right.

A "D" has more low RPM tuque then a "Y" therefore more average AMP draw.

Larry

[NativePaul]

The racing I do requires efficiency rather than outright power and I will happily run a D or a Y, whichever comes closest to the KV that I want, with the motor size I want to run.

Tenshock also make good motors in China, Their CZ and VS series motors are good motors for the money, and while they are too rich for my blood their EVO line are possibly the best commercially available motors available at any price, I know a bunch of people that have upgraded to them from Lehners of the same size and similar KVs.

[ray schrauwen]

The racing I do requires efficiency rather than outright power and I will happily run a D or a Y, whichever comes closest to the KV that I want, with the motor size I want to run.

Tenshock also make good motors in China, Their CZ and VS series motors are good motors for the money, and while they are too rich for my blood their EVO line are possibly the best commercially available motors available at any price, I know a bunch of people that have upgraded to them from Lehners of the same size and similar KVs.

Any idea how these are? I can make a cooler for it if needed... Tenshock 1/8 Buggy 6 Pole Sensorless RC Brushless Motor X802V2-2400KV?

[NativePaul]

The only people I know using them are rock crawlers, they like them, and rave about a lack of clogging for a senseless setup, but it is a bit of an irrelevant review, as I don't think any of them have done any data logging, and probably wouldn't notice quite a large difference in efficiency.

[donhuff]

Paul,

Thank you so much for saying this

"I will happily run a D or a Y, whichever comes closest to the KV that I want"

[donhuff]

Larry,

I don't know about that. I'm always reading something that conflicts what I have read before on the subject. But I know what your saying, as I have heard the same thing.

BUT, what would it matter if one DID have more torque than the other at some point OTHER that at peak, or slightly below peak, rpm. We don't run our motors at low rpm/and WOT because that would burn them up. We can't even run them at half of peak rpm (except for maybe SAW runs) which is the typical rpm where peak horsepower is made. We usually run our motors at between 75 to 80% of peak rpm, which is the point where they make the most power, for the least heat generated.

Say you want to run closer to your HP peak? Then you better up grade your cooling system! Get below that 75% mark, and heat increases rapidly.

[ray schrauwen]

HP peaks. Very interesting.

[donhuff]

Paul,

I looked at that Tenshock EVO, WOW. $199 for a 29x58 motor it really is an expensive little motor. Reading the specks to find out why, I see that it uses good bearings ans SILVER wire!! That's going to the extreme isn't it. So I had to look up a chart that shows the conductivity of various metals to understand why. And yes, silver is very slightly more electrical and heat conductive than copper, not much but just a tiny bit.

Copper is rated at 100 as the baseline I suppose, and silver was rated at 104. Third in line was a surprise to me as I thought it would be better, Gold at 77.

I also noticed the copper plate on the PTO side of the stator to make the Y connection, like most of the small 2 pole car motors use.

[donhuff]

Ray,

Tenshock 1/8 Buggy 6 Pole Sensorless RC Brushless Motor X802V2-2400KV? I think that if you want a motor like that, I would get one of the Dynamite 3935 40x82 motors, but it's only 1650 kv and that might not be enough for what you want to do with it. But internally that is basically the same motor, only 82mm long instead of 68mm long. Better yet, If you could find one that somebody has burned up, out of one of the RTR boats, and send it to me for a rewind at the higher kv and new ceramic bearings, then you would have a good motor!

[donhuff]

"HP peaks. Very interesting."

?? questions???