Castle - Make A Special Edition Monster

[BrianG]

Artur, I already "know" what the answer is, but thought it would carry weight if it came from a designer of the product. I'm just thinking forward to when CC starts carrying their MMM and motor combos.

I see a lot of people running kinda low rpm setups and gearing almost too high, and also the occasional startup cogging.

Sounds like someone has a case of the Mondays! (Office Space reference in case you didn't get it )

[johnrobholmes]

From a typical R/C use standpoint, sensorless commutation works well enough. As Patrick pointed out Rock Crawlers could certainly benefit from a sensor, but I can't imagine any way that it would improve performance anything else out there in the ground market (besides tall rollout 4 cell nimh carpet racers).


Boy what I wouldn't kill for a sensored outrunner system. Maybe in one year.

[gixxer]

my monday was fine. the only thing that is getting me down is Pdelcast has an e-revo and I dont (haven't even heard of traxxas shipping yet).

[hootie7159]

luckily my job allows me 4 days off at a time ..... anyways all this extremely deep electric talk was just basically bathroom reading until i saw that patrick has an e-revo .... ... ....i want one

[Happywing]

I don't know all the fancy shmancy terms and techno-blurb, but I have a lot of experience with a lot of controllers. Sensored USED to be better. It was not hype, it was fact. A year or more ago, sensorless simply was not as smooth, especially at low speeds. The sensored-smooth advantage is all but gone now and I won't likely buy another sensored system myself. There was a time though, that I wouldn't even consider sensorless because of the rough initial acceleration.

[Sammus]

A lot more than a year ago, if ever IMO. I had a mamba max system over a year ago, and it was the smoothest thing I ever drove even back then, on any batteries :)

[suicideneil]

Just to rub it in guys, we are experiencing a mini-heat wave today; boiling hot and sunny!

My MMM has been 100% smooth in bench testing, save for the brake issue which I am working on, so I guess sensors arent really needed in this application anymore with the better software of sensorless. That said, I still would like Novak (boo! evil!) to release a 6s sensored esc, with realistic specs, and proper motors. I guess I will be able a realistic comparison now since I can run both escs on 4s lipo and 14 cells, with the hv6.5 motor providing the motive power. Cant say fairer than that really...

[BrianG]

Originally Posted by suicideneil

Just to rub it in guys, we are experiencing a mini-heat wave today; boiling hot and sunny!

Enjoy it! Weird weather in the US lately. Intense heat on the East Coast, snow on the West Coast (north, but still abnormal for June), and crazy rain/floods around my area that are damaging properties all over the place.

[tc3_racer_001]

Originally Posted by BrianG

Enjoy it! Weird weather in the US lately. Intense heat on the East Coast, snow on the West Coast (north, but still abnormal for June), and crazy rain/floods around my area that are damaging properties all over the place.

its from all those nitro people

[SpEEdyBL]

What I want to see is a Novak HV motor run on an MMM. If sensored technology is really THAT bad, AND and people are consistantly getting sub 150* temps on the motors and I am getting an easy 45-50 mph with my hv4.5/8ight, I can only guess that using an MMM/Novak HV setup would be pretty sweet. Not only that, but a HV6.5 or 7.5 on 6s would also be pretty sick.

[suicideneil]

You may be in luck my friend.

The MMM runs my hv6.5 perfectly, no cogging at all or even the slightest stutter. I plugged in one of my 6s A123 packs, which is equal to about 5s lipo in voltage, for testing with. I wound it out to max rpms, and all I can say is fook may, its abit scary at that speed.....

[Finnster]

I would like to thank Patrick for his outstanding attitude and willingness to come on such forums and others to listen to customer feedback and field questions (tho innane and ignorant some may be.)

That being said, I still stick to my wish list. A 8S capable controller with outstanding hardware and software. Good customer service is obvious (and well handled by CC.) A relatively small footprint, simple mounting, reliable heat dissipation w/o the use of fans (as Pat dC said, K.I.S.S.) and an amp capability of 120-160A or so. Preferably splashproof. 6mm or 5mm bullets would be great. A switching BEC is gravy. Oh, also anti-spark tech built in. (Anyone that's plugged a 40V battery into an ESC w/o pre-charged caps know what I mean.)

The MGMs are outstanding hardware, but the software is primitive compared to CC's. Its not horrible, but CC is so far above everyone else software-wise it's no comparison. As said before, a CC version of the MGM 16024 would be the end all of controllers. I realize this would be a very niche controller of a already small market, but wishes can be anything.


Patrick, I do have one question on the controller you are toying around with.. what would be the purpose of of going higher than 8S? IE, is what you are targeting an 1/8th scale or 1/5th scale controller?

For 1/8th scale, from my bit of experience, going above 8S gives diminishing returns. Ideally you are shrinking the battery capacity as you are upping voltage. 10 or 12S of even a 3.2Ah pack is pretty heavy. Small lipo batts (say below 3.2Ah) start losing energy density ( ie mAh/g) so any eff benefits lose ground to greater weight to get the required runtime. If its the same FETs to be used, then great, more V headroom. If its pricer FETs, can the specs/price come down? Tho I'm sure you've already considered this...

OTOH, are you attempting a 1/5th scale/Prius capable Big @$$ M.F. MMM ESC (BAMFMMMESC)? I just wonder if it would be a bit overkill for 1/8th scalers who want to run HV (a minority of a minority) in power and price. I can't see an 1/8th scale that would ever need or even use a 12S 3200 mah pack.

For marketing purposes you may want to cut down the name a bit tho, maybe just "Godzilla Max" (he was a lizard too.) BAMFMMMESC does seem kinda catchy tho. :)

[MTBikerTim]

I bow to Mr Patrick del Castillo (Where is the bow smilie). Reading posts like that makes me wish I worked at Castle.

[johnrobholmes]

How about a high pole count sensored inrunner or outrunner for us Crawler guys? Optimize slot/pole ratio for about 2700kv and 3 cell lipo. If you don't do it I will as my number 2 project.

[BrianG]

Speaking of crawlers, wouldn't a stepper motor be a better idea altogether? Granted, the wiring would be a PITA depending on the number of steps...