Sensored Outrunner motors- Revolver S

[JohnRobHolmes]

The runaway motor problem is masked with an outrunner. At the moment there are no OEM ESC hardware desings capable of implementing our control scheme, so it will be a long row to hoe on the control side. On the motor side it is easier to deal with, and we have done so.

[fish-hunter]

Ive been playing with esc settings in my mmp and have gotten really smooth. The runaway issue is just about gone too. Still needs some tweeking but its an awsome motor. Think im gonna use the stubby for my light weight scaler build.

[JohnRobHolmes]

Running samples of the Revolver SR, a high rpm balls out version we have been working on while thumb twiddling on the previous designs.

Who wants a 50k rpm capable monster that starts up buttery smooth and weighs only 4.4 ounces?

[Dezertdirt]

That's awesome. When are they coming out? how much? Also has anyone used any of these on a comp rig?

[JohnRobHolmes]

It will be a while before the ESC size can offset the motor size in a USRCCA 2.2 competition setting IMO, so for the time being I don't see brushed being supplanted by brushless in that sort of rig. On U4, G6, and any general heavy body trail rig there is more room and less need for tight CG controls, so that is where brushless really rules.


We have another 6 samples being made before running a full batch. I would estimate 3 months for the real release of these.

[Olle P]

Originally Posted by JohnRobHolmes

Who wants a 50k rpm capable monster...

... and who's got an ESC able to handle that speed?
Assuming it's a 14-pole motor the speed is equivalent to 350k rpm with a 2-pole...

[JohnRobHolmes]

So far, only a castle has survived. Killed three controllers yesterday finding a tune that runs well. We have managed 35k rpm, which is plenty fast to pass!

[Shinjari]

How does that prototype 50k compare to the previous revolver s 540? Not sure I've seen a rpm for the Rev S 540.

[JohnRobHolmes]

The reg revolver S shouldn't be spun much past 20k because of switching losses, they will get hot fast.

[King James]

Awesome to hear. Looking forward to the new batches. It was a great motor before. Sounds like it's gonna be an absolute beast now.

[Shinjari]

So I'm torn between this and a tekin ROC 3100kv to run in my ultra 4. Seems the revolver will have better low end and the ROC obviously high end since it's a 3100 not 2000?

[holycaveman]

Originally Posted by Shinjari

So I'm torn between this and a tekin ROC 3100kv to run in my ultra 4. Seems the revolver will have better low end and the ROC obviously high end since it's a 3100 not 2000?

If you don't care about low end, the roc 412 is fine. They just don't crawl well(what I consider well)

The revolver s you can gear tall to get the speed of the roc 412 and still are able to crawl. That is the kicker for me.

[Crawl Space]

Originally Posted by JohnRobHolmes

So far, only a castle has survived. Killed three controllers yesterday finding a tune that runs well. We have managed 35k rpm, which is plenty fast to pass!

I think it's time for the Holmes Torquemaster BLS-X ESC with a sensored outrunner mode

Super excited about the new motor

[seychelles]

After 2 revolver s .... Need definitively one SR, I cannot wait :-)...
Good job John , your products always the best

[Calderwood]

Originally Posted by JohnRobHolmes

So far, only a castle has survived. Killed three controllers yesterday finding a tune that runs well. We have managed 35k rpm, which is plenty fast to pass!

How many watts does that new motor pull? I know that a mamba maxx spinning a 4 pole at 50,000rpm gets pretty hot. I can only imagine what 14(?) poles at that rpm would do to it. What is the "tune"? Just changing the parameters that we all have access to or flashing your own firmware?

[Meatwad]

Originally Posted by JohnRobHolmes

The runaway motor problem is masked with an outrunner. At the moment there are no OEM ESC hardware desings capable of implementing our control scheme, so it will be a long row to hoe on the control side. On the motor side it is easier to deal with, and we have done so.

This here is a truism. I've not noticed much of the downhill runaway when going from drag brake to throttle.

Is the masking from the greater rotating mass of an outrunner? Is that even a factor?

[THE ROOKIE]

Originally Posted by JohnRobHolmes

The runaway motor problem is masked with an outrunner. At the moment there are no OEM ESC hardware desings capable of implementing our control scheme, so it will be a long row to hoe on the control side. On the motor side it is easier to deal with, and we have done so.

Getting back into crawling (comp).very interested in your product. I have never used your product before but have heard great things. I have spent a lot of money on custom motors from your competitors with very bad success. When you spend 200 a motor X2 the results should be very good. Anyways I was wondering if I can prepay for these new motors and esc. Thnks for your time .

[Del Monte]

I got my hands on the 2900kv version for some testing in my 2.2s rig. Like JRH said earlier, the startup is very smooth, but not quite as good as a proper brushed motor. The torque and wheel speed is off the charts though, especially for such a small/light motor. I have a pile of drive shafts and locker bits from the last two test runs

I settled on a mamba max pro to power the little guy. The motor had problems getting along with my Tekin systems, but the MMP seems to be working out great.

It will take a little tuning to make it a perfect comp motor, but I think that the potential benefits are huge. I'm going to pop it in my 2.2 U4 rig for some trail testing after Worlds.

[JohnRobHolmes]

This little guy has been a blast to drive. I keep forgetting how small it is. Even with stock wraith gearing it takes the beating well, running about 160f after 10 minutes of hot laps around the yard.

Holmes Hobbies Revolver SR sensored outrunner rock crawler motor - YouTube


Holmes Hobbies Revolver SR sensored outrunner rock crawler motor - YouTube

[cartronicshn]

Look good on the low end with stock gearing