Don't the bearings have something to do with the maximum RPM of a motor? I can has magnetic bearings?

Maybe high grade ceramics? they can take considerably more punishment than a steel bearing.

Is that lipo or a123?

when i first got into brushless, i bought the novak GTB 3.5R system for my hpi pro 4, and that motor could go up to like 10,500 and that was agessss ago

Forgot to mention that it is with A123. I'll build me a flat 4s1p A123 pack and see how that runs. That should be more like a 3s1p lipo pack under load.

But figure that under "drift mode" the rotor is spinning abit over 60K rpm.

Bearings must run hot at those speeds

The Novak motors are rated unloaded I believe, which always gives much higher numbers. The Castle motors are rated under load, though; the 9000 will be a fair bit faster than a 3.5R.:wink:

This motor on 2s will not be any faster than than a cms 5700 motor on 3s.

9,000 x 7.4 = 66,600 rpm
5,700 x 11.1 = 63,270 rpm

And if you take into acount that the 5700 setup will be slightly more efficient than the 9,000 kv setup, you will be able to gear the 5700 up to match the rpm at the wheels. Not only that, but the esc will create more than twice as much heat with the 9000 kv setup.

So no need for there to be anything special for the rotor or bearings compared to the current existing motors.

If they are giving the motor 100k rpm specs it must use good bearings, and some sort of rotor wrap...

Actually Patrick said a while back they changed all of the cm36's to be 100k motors.

The 9000 will be no more or less efficient. While lower KV motors use lower amperage to hit a given RPM, the wind resistance is higher so it is a wash. Efficiency is dependent on construction and load, not KV.

That would be correct sir!

New bearings, new magnet, new glue, heck, new almost everything.

Sweet! I've got an older CM36-5700 which finally gave up the ghost, even the old ones were tough as nails. When will the 9,000s be shipping? I'm looking at buying a street car and that would be a nice motor for it.

Is there any way of knowing these motors over the old ones?

Yes -- new connectors on the new motors. If you have the split type connector, it is the newer motor. If you have the banana type connector (with the twirly bit on the male side) you have the old motor.

any chance of a lower kv motor...like 3k ish?

Yep -- coming soon.

We are also working on a motor that will be sorta half-way between a 1515 and a CM36. So-- very fast 4s 10th buggies (read lotsa broken parts!) or more mild 1/8th buggies and 1/10th monster trucks.

Ah that might be a interesting motor to try out.

Sounds like a 1512 :whistle:

Well, I meant in output watts.... the 1512 is almost the same output power as a 1515.

Oh, . . . any plans for a 1512 version for 1/8 buggies then?

Ummm, yeah. They are shipping now. :whistle:

Dang, sorry Patrick . . . I probably should have known that. :tongue:

Hey Patrick, I just checked your site and didn't see anything on them. Where can I find them to check pricing?

So Patrick... Would the 9000kv motor handle 3s lipo? Maybe with the MMM and a very good 3s lipo. It would be for straight line speed runs, not constant use, and temps would be checked after each run.

Whoops -- lemme fix that statement I made earlier. They have shipped TO us, we have not yet stocked them.

You should be able to get them from Tower pretty soon.

No, 2S Lipo max, 7 cell NiMh max. That's it.

The bearings will not survive --

Hmm, what size bearings do those motors use? Do you think the rotor will hold up... If I kill it I will not send it back to you, experimenting is just that, experimenting!

Also are those motors still 2 pole designs? I just wonder as 9000kv at 3s lipo on a 4+ pole motor might be a bit much for a MMM or MM.

Thanks for the quick replys Patrick, always helpful!!

sounds like a challenge! must kill one on 3s (at my own risk)! is my math off? They are rated over 100k rpm and 3s lipo should be 99900 rpm.

I'll be waiting to see who's going to try 3S first lol. I can see it now, 300-400A spikes, oh man!!!! chase it!!!! it's smoking!!!! Bobby, how can I chase a ballistic missle :neutral:, just let it burn :diablo:?

Any idea on what kv size?

The bearing size is 14mm x 5mm x 5mm, which is REALLY big by 36mm motor standards. . . Helps with side loads and impacts (not than these motor ever actually take any impacts.... :whistle:) but is a little hard on the balls and race at really high RPM.

The bearings are rated for 75,000 RPM continuous, 100,000 short term.

Still a 2 pole design. :yes:

I will have one of them in my 3S TFE dragster for at least a couple of passes. Not to worry Pdelcast and gang, I always send a check in with my repair orders :whip: :mdr:

My TFE dragster:

http://i256.photobucket.com/albums/h...d/P1020083.jpg

http://i256.photobucket.com/albums/h...d/th_Movie.jpg

That's ungly. I'll take it out of your hands for free though. I'll make it look pretty lincpimp style.

Wow those things move sunny!

Sunny will be in trouble once I get the hang of drag racing :lol:. Watch out Sunny :whistle:.

Thanks guys! Some of the fastest RC cars on a consistent basis can be found in RC drag racing. I made it to the 2008 IMDRA Worlds semifinals and lost to the eventual TFE winner. 80mph+ in 132' in under 1.6s is the norm for these beasts with the top racers hitting 90mph - 100mph.

Lutach, all I can say is I'd love to line up against you any day. It'll be a blast and the best racer always wins. Fair 'n square.

I have a very keen interest in the CC 9000kV motor for RC drags. Right now I run 7700kV motors on 3S, just like pretty much 75% - 80% of the electric RC drags world. With a good lipo the 9000 should be quick... or at least I hope so.

RC speed maniacs and Castle Creations seem to be a good fit.

Edit: here's a couple of my favorite RC drags videos:
1. http://www.youtube.com/watch?v=Tqi1r...eature=related
2. http://www.youtube.com/watch?v=2uzLmZ-QEkU

@patrick

this new motor that's between cm36 and a 1512 is it going to be 4 pole and would it be more efficient like the neu based motors you have for the mamba monster combos?

Oh i found a picture of the new cm36 motors and i have to say that the new connectors look the muts nuts.
http://i136.photobucket.com/albums/q...r/parts015.jpg

I wonder has the efficiency of these motors been improved also with these upgrades.

I'll see you in the summer and I'll be more then ready as my drag car isn't so over geared anymore.

Nice. I will be going to the Rockingham, NC IMDRA event next year. Are you gonna be in Texas?