Has a worthy ESC been born? The Castle XLX2 looks to be an excellent ESC.

[LibertyMKiii]

Can you run this setup with 6S or 8S? 1700kv on 4S is not going to stress the motor unless you put on a 80mm prop which is not going to run well in the hull. Running on 6S or 8s will greatly increase the motor power and you can still run reasonable props.

I could and likely will work my way up to 8s at some point.
My experience has been that lower voltage setups tend to pull higher amps and generate lots of heat when attempting high speeds. This was my attempt to generate high amps and heat to share with the forum on how the XLX2 performs under these loads.

Possibly I missed the purpose of the thread that it was supposed to be more about your water cooling developments?
I apologize if I have derailed the thread in anyway.

[RaceMechaniX]

No need to apologize, you are not hijacking the thread. We are all discussing what the XLX2 can and cannot do. The data plots are nice to see and prove what the ESC is capable of. You are correct that it is typical of lower cell count boats to pull higher currents in fast setups. N2 (2 cell) is one of the hardest classes because you need a monster ESC to drive high power levels. 400A was not uncommon for a 2 cell mono. My point is you need a 3000-4000kv motor on 4S to really stress the ESC. 1700kv is not going to cut it. Without switching motors, the easiest change is to increase cell count. 1700kv is on the warmer side for 6 cells, but definitely on the hot side for 8 cells. Running higher cells will push the power and amperage up if you want to see that the XLX2 is capable of.

-Tyler

[RaceMechaniX]

Today I tried my own static test of the XLX2. I mounted a 2250/4 Lehner configured in Wye so it becomes a 7 wind with an unloaded kv around 2400. I ran a pair of HobbyKing 65C 6000mAh Graphene cells in parallel so 6S2P with a total of 12,000mAh. No fins and no cooling at all. I thought this setup would be a little hotter on 6S, but it turns out 350A is no sweat for the ESC. This test produced a maximum of 8.4kW@37kRPM. The ESC barely got warm! I will crank up the frequency in another test and run a hotter motor to continue stress testing. We'll have a winner if this ESC continues to perform this good.

Here is a short video of a cyclic test 50-100% throttle over several seconds. Note that is an 12lb piece of steel on top of the batteries and it inches backward with every full trigger pull.

Castle XLX2 High Load Test Lehner 2250-4 Wye 2400kv unloaded HK Graphene 6000mAh 6S2P Schuleber .jpgCastle XLX2 High Load Test Lehner 2250-4 Wye 2400kv unloaded HK Graphene 6000mAh 6S2P Schuleber .jpg

[fweasel]

That's great news Tyler

[Hotrods]

[QUOTE=RaceMechaniX;757906]Today I tried my own static test of the XLX2. I mounted a 2250/4 Lehner configured in Wye so it becomes a 7 wind with an unloaded kv around 2400. I ran a pair of HobbyKing 65C 6000mAh Graphene cells in parallel so 6S2P with a total of 12,000mAh. No fins and no cooling at all. I thought this setup would be a little hotter on 6S, but it turns out 350A is no sweat for the ESC. This test produced a maximum of 8.4kW@37kRPM. The ESC barely got warm! I will crank up the frequency in another test and run a hotter motor to continue stress testing. We'll have a winner if this ESC continues to perform this good.

Here is a short video of a cyclic test 50-100% throttle over several seconds. Note that is an 12lb piece of steel on top of the batteries and it inches backward with every full trigger pull.

Castle XLX2 High Load Test Lehner 2250-4 Wye 2400kv unloaded HK Graphene 6000mAh 6S2P Schuleber .jpgCastle XLX2 High Load Test Lehner 2250-4 Wye 2400kv unloaded HK Graphene 6000mAh 6S2P Schuleber .jpg

[/QUOTE

Awesome news. Thank you Tyler

[donhuff]

Another advantage of the Mamba X series is that you can move the esc close to the motor and put your motor connectors directly into the esc connectors. This does away with the lead extensions. And as a side benefit, the connectors get the cooling from the water cooled esc! After some hard runs the connectors are no warmer that the esc. NO MORE UNSOLDERED CONNECTORS!!!!! And now I can use plain ole 60-40 solder.

DSC_0012.jpg

DSC_0013.jpg

and if you can't get the esc close enough, get AMPDADDY to rewind your motor and put leads on it to the length that you require.

[donhuff]

one more picture

DSC_0014.jpg

[zooma]

one more picture

[ATTACH=CONFIG]173804[/ATTACH]

You're saving a lot of money by eliminating the heat shrink, eh?

[admin]

Sorry to say but if your thinking this is the end all of esc's, a local drag car racer with a ton of experience has been using one in a drag boat. He was able to kill it. He hasnt given up, he has a second one he's using now.

[Panther6834]

Sorry to say but if your thinking this is the end all of esc's, a local drag car racer with a ton of experience has been using one in a drag boat. He was able to kill it. He hasnt given up, he has a second one he's using now.

"Never give up, for that is just the place and time that the tide will turn." ~ Harriet Beecher Stowe

How appropriate for a boat-related forum.


~ More peace, love, and kindness would make the world a much better place

[fweasel]

Sorry to say but if your thinking this is the end all of esc's, a local drag car racer with a ton of experience has been using one in a drag boat. He was able to kill it. He hasnt given up, he has a second one he's using now.

That doesn't really tell us anything. I can kill any ESC in any boat with too much prop load or a crappy setup. That fact does not imply there are no good ESC's for boat use available. This modified Castle is checking off a lot of boxes in a tiny market of the RC industry that doesn't see a lot of new electronics development. It's an exciting development for many who need more headroom and can benefit from the data logging too.

[RaceMechaniX]

Good news to report. The first batch of Stump Fabrication coolers have been machined and I am working on the instruction details. These fit nicely directly over the existing aluminum plate and are compact. These will be available on the Stump Fab website as soon as we finish the instructions so hopefully early next week.

Castle XLX2 Stump Fab Cooler Pic 1.jpgCastle XLX2 Stump Fab Cooler Pic 2.jpgCastle XLX2 Stump Fab Cooler Pic 5.jpg

[Panther6834]

Woo-hoo. Getting close. Just curious...for the water line fittings, why plastic, instead of metal?


~ More peace, love, and kindness would make the world a much better place

[longballlumber]

Nice work on both accounts!

[zooma]

[QUOTE=RaceMechaniX;758153]Good news to report. The first batch of Stump Fabrication coolers have been machined and I am working on the instruction details. These fit nicely directly over the existing aluminum plate and are compact. These will be available on the Stump Fab website as soon as we finish the instructions so hopefully early next week.

Great. I have the ESC on order.