Sensored Outrunner motors- Revolver S

[JatoTheRipper]

Did your recent video reinvigorate interest in these motors?

[JohnRobHolmes]

Just building them up and putting them for sale did, a lot of folks had been asking for the sensorless version. I'm sure the video hasn't hurt though.

[Ditchrat]

Originally Posted by JohnRobHolmes

Just building them up and putting them for sale did, a lot of folks had been asking for the sensorless version. I'm sure the video hasn't hurt though.

Saw the video, it was intriguing.

Less is more, and not having a sensor cable to contend with seems like a good idea. Being 2 weeks new to brushless, exactly why did this route not become the norm? I read some of your old threads and it seemed like your where heading this way then stopped.

[JohnRobHolmes]

Low speed control with sensorless was great at first, because of a company called Quark. They got absorbed by the Korean military and our next best choice was then Castle, and it was honestly quite terrible startup. So terrible that it simply wasn't something I wanted to put my name on any longer. Their sensorless startup is only now (10 years later) as good as Quark was back then. Although noisy. While sensored still offers better loaded torque performance at low/no RPM, the right motor combined with the Mamba X is up to my performance standards enough to offer it again.

[HumboldtEF]

These motors look intriguing. Will there be sensored versions anymore or has the sensorless been improved to a point its not needed?

[JohnRobHolmes]

In the current form there will not be a sensored version, but it is nice that sensorless is again an option for the average crawler. I worked with a aerospace company on sensored outrunners for 3 years and they ended up over $2,000 each motor because of the parts, assembly, and testing needed to get them to pass QC. It's far too tight tolerances for hobby grade pricing to turn out a quality motor. Heck, just the hall sensors without 3 degrees of sensor variance were $15 a pop. All the little sensors we use in toy motors have absolutely horrible accuracy of sensor placement within the die, and for regular toy motors with low pole counts they work just fine. A few degrees of mechanical jitter on a 14 pole wrecks them though.

[durok]

Originally Posted by JatoTheRipper

Did your recent video reinvigorate interest in these motors?

I think them showing up on RPP as new releases may also have had something to do with it...

Not a bad price, either!

I had never really thought about them until I watched a BPC video of an Ascender with one installed.

Always great to have more options and technologies!

[Ditchrat]

Originally Posted by durok

Not a bad price, either!

It is difficult for me to drop over a 100 on a motor that I personally do not have the skill or knowledge to notice an improvement in driving. The price of the revolver is very much at a price point where I feel comfortable trying one.

[DUBSTER4LIFE]

Any chance on seeing a new 550 revolver anytime soon?

[bbrigg]

Originally Posted by DUBSTER4LIFE

Any chance on seeing a new 550 revolver anytime soon?

I have to say that would be awesome. The torque of the 540 Revolver is great, imagine having more!

[JohnRobHolmes]

I'll consider it. Can't make it too much longer though, endbell starts to crash into the rotor. I'd say try a 1000 or 1400 and see if you actually want more torque. Due to the length we can't hit the higher kv's and its very unlikely that it will actually pull more torque than the current version of the 540. Rigs are gonna break before the 540 hits near peak.

[Thorsteenster]

Damn, guess I missed the boat on these...
Anyone still rockin a sensored outrunner?!

[Druxus]

You don't need sensor outrunners anymore, the Holmes Crawlmaster esc will start a outrunner so slow you can count the revolutions. Once it starts it keeps the rpm, and just keeps chugging along.

[themountain]

Originally Posted by Druxus

You don't need sensor outrunners anymore, the Holmes Crawlmaster esc will start a outrunner so slow you can count the revolutions. Once it starts it keeps the rpm, and just keeps chugging along.

Eehm...not only the crawlmaster does that All AM32 ESCs are able to do so

[Cyclist]

3Brothersrc makes a sensored outrunner.