Anyone using a 1515 2Y???

[jzemaxx]

I am looking to try the 1515 2Y on a truggy and was just wondering if anyone has tried using one?? I was hoping to get maybe some higher runtimes with it then my current setup. I am looking to buy one, but NEU is backed up so going to have to try to find one soon.

[jzemaxx]

BTW, I will try to run on 8S this setup. Just seeing if anyone else may have given this setup a shot.

[lutach]

Yes. Awesome and won't go back to 6S.

http://www.youtube.com/watch?v=GiFHNKIReeA
http://www.youtube.com/watch?v=Gk_-43CZa-k
http://www.youtube.com/watch?v=6RUtxc4-ZRQ
http://www.youtube.com/watch?v=kaH0ZdpP9Nc

[lutach]

So far, I'm only hitting 60A spikes and depending on the battery I use, I get up to 45 minutes. My truggy (Mugen MBX5T with a Mr. C conversion) is very light and only geared for 34mph. I use 2 4S 3200-3700mAh packs.

[zeropointbug]

Longer runtimes as in what? You want more running time between battery swaps? If so, you aren't going to, running higher voltage does not really bring longer runtimes, it does bring lower temps though.

[lutach]

Originally Posted by zeropointbug

Longer runtimes as in what? You want more running time between battery swaps? If so, you aren't going to, running higher voltage does not really bring longer runtimes, it does bring lower temps though.

Compared to a 4S or a 6S set up (I tested both btw), the 8S set up of mine has only been asking for 60-80A (Depending where I run) spikes and the AVG. is anywhere from 5-10A. The latest video where I used the new 10S ESC on grass, I saw the most an 80A spike and an avg. of only 8A.

Sorry if the picture is too big.

[lutach]

Forgot to add that a smooth driving style will play a big part of how much current you use and this will help in going further on one charge.

[Finnster]

I had a 2Y on 8S and 10S on my Revo as well. It was awesome and always dead cold. Lots of TQ as well. IDK if you are going to get a dramatic change in runtime, but you will save all the energy wasted as heat. My avg draws were ~65A peak, but hit a few 90A here and there.

FWIW I have a 80mm 1100 kv medusa in my SavageXL now on 8S and it runs nicely. Hotter than I would have expected, but the truck is twice the weight of my Revo and the medusa not as eff as the Neu, but still good none the less. Still dialing the gearing as well. No way I could run this truck on a 4S setup and not have fireballs.

[aqwut]

I had one of my 1527 to go into my Mayhem, but it was too big... so my 1515 1.5Y has just arrived today... that will be going into the Mayhem pro.. I will let you know how it turns out.. but it think it will be fine on 8S, for approx 45K peak...

[starscream]

Originally Posted by zeropointbug

Longer runtimes as in what? You want more running time between battery swaps? If so, you aren't going to, running higher voltage does not really bring longer runtimes, it does bring lower temps though.

Do you have real world experience to justify your statement?

Just looking at your statement logicaly, it doesn't make sense. If a higher voltage system produces less heat then this simple fact alone is proof that higher voltage would provide longer run times. The lower voltage system's wasted energy, from heat, will reduce its run time. The difference of the two system's runtime may be small but it exists none the less.

My real world experience has been the higher the voltage, the longer the runtime. The difference in runtime isn't that much but is measurable.

[littlegiant]

Originally Posted by starscream

Do you have real world experience to justify your statement?

Just looking at your statement logicaly, it doesn't make sense. If a higher voltage system produces less heat then this simple fact alone is proof that higher voltage would provide longer run times. The lower voltage system's wasted energy, from heat, will reduce its run time. The difference of the two system's runtime may be small but it exists none the less.

My real world experience has been the higher the voltage, the longer the runtime. The difference in runtime isn't that much but is measurable.

I think he meant that the increase in runtime isn't a lot.

[lutach]

The biggest gain will come from driving style and how much gearing one needs.

[starscream]

Originally Posted by lutach

The biggest gain will come from driving style and how much gearing one needs.

I agree, you will gain from proper setup.
The appropriate voltage/motor kv/gearing does wonders.

[othello]

I'm using a Neu 1515 2Y (smooth can) since almost 1.5 years paired with 9-11s1p A123 (27-33V avg) and a Jazz 55-10-32 Esc. It has powered my truggy, buggy, buggy/truggy mix, Rally game Buggy, Trophy truck and now a custom 1:5 Baja.

Due to its low kv (1100kv) it needs more volt than your average MMM setup with max 6s. Feed it with around 30V (8s lipo or 10s A123) and you will have a good rpm range to power any 1:8 buggy or truggy. Power it with up to 10s lipo (or 12s A123) and this motor just becomes plain silly from a torque point of view. Due to its higher resistance you want to keep amps low. Temperature remains very reasonable as long as your Amps hover between 10-70A with an average of 10-20A.

Don't expect a big jump in runtime when switching from say a Neu 1515/1Y fed by 4s 5000mAh to a Neu 1515/2Y fed by 8s 2500mAh. Both motors can output the same amount of power.

Example:
. Neu 1515 1Y: 3.5V x 4s x 100A = 1400W -> 100A^2 x 0.006ohm = 60W lost in heat (only windings)
. Neu 1515 2Y: 3.5V x 8s x 50A = 1400W -> 50A^2 x 0.019ohm = 47,5W lost in heat (only windings)

Theoretically and practically there is a small gain in efficiency when switching from a 1Y to 2y when doubling the voltage. Heat build up of the motor is somewhat lesser. Same goes for cables, connections, Esc.

Now if you feed a 1515/2Y with 100A -> 100^2 x 0.019ohm = 190W lost in heat (windings only) opposed to 60W with a 1Y motor. Explaining why you don't want a 1515/2Y hitting 100A to often otherwise it will heat up quickly. On the other hand 3.5Vx8sx100A = 2800W (minus atleast 190W -> 2610W). That's some serious power for a truggy which you won't need at your track anyway. My truggy (CD with 30000k oil) started to wheel with power levels above 1700W. This is one of the last videos of my truggy powered by a Neu 1515/2y fed by 9s1p A123 (27V avg) with integrated eagletree inserts. Amp levels were on the safe side, no heat issues. Power was good (still somewhat to agressive).

If you already have a good working 4s setup and only expect a huge advantage in runtime i'm sorry to say a step up to a 8s setup might give you a runtime advantage of only a few seconds (maybe half a minute) when you run both setups at the same power level with the same energy amount on board. A friend of mine switched from a Neu 1515/1Y 6s2p A123 setup to a Neu 1515/2Y 11s1p A123 setup (1 cell less than his LV setup). We couldn't compare them under the absolute same track and setup conditions but power felt almost same, no runtime upgrade (Ok, 1 cell less) ... motor may have run slightly cooler.

At the end: Your car will require the same amount of power to move around a track at the same velocity, no matter which motor you use. Neu motors are efficient no matter what winding you choose. When properly geared and fed (voltage) a Neu 1515 should run happily for a long time in a truggy. As already mentioned: you will see the biggest improvement in runtime with an adjustment to a "rounder" driving style or by adding a bigger (more mah) battery pack.

[lutach]

Originally Posted by starscream

I agree, you will gain from proper setup.
The appropriate voltage/motor kv/gearing does wonders.

It's a wonderful thing . With my set up, I have no heat issues at all and I feel a lot safer with it then with a 4S set up that I tried once and will not do it again.