It's official! Castle have lost the plot (in a good way)

[lincpimp]

Originally Posted by johnrobholmes

Maybe it was a proof of concept for high revving motors. I know they have changed the rotor design.

So what does it look like now?

[johnrobholmes]

They played with a few concepts. I am not sure if they settled on a carbon wrapped or aluminum framed version, but once their large scale motors are out the small scale ones with updates should come in too. Evidently once they started getting over 85k there wasn't a glue in the world that would hold the magnets without structural assistance.

[pasan]

I wish I were back in Alpharetta to take advantage of the cool weather. I have to deal with ~90F temps all year long :(

[himalaya]

Get a 9000KV, PULL its Rotor out, insert into a 7700KV's can, Now you get a robost 7700.

I believe the 9000's ROTOR is where it values, should has some special material and technique like Kevlar wrap and temp-resistant magnet.

[Unsullied_Spy]

Originally Posted by himalaya

Get a 9000KV, PULL its Rotor out, insert into a 7700KV's can, Now you get a robost 7700.

I believe the 9000's ROTOR is where it values, should has some special material and technique like Kevlar wrap and temp-resistant magnet.

Go with this and a 3s lipo pack almost 100,000 RPMs.

[DRIFT_BUGGY]

lol, nice web page by Castle

[sleebus.jones]

Great for dragracing and speed records, but not much else. Meh.

[emaxxnitro]

if they can make a rotor stay together at that speed they should make a 2000kv 50volt motor

[pasan]

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

Originally Posted by pasan

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.

[ReV:-O]

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

[Dagger Thrasher]

Originally Posted by ReV:-O

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

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.

[DRIFT_BUGGY]

Bearings must run hot at those speeds

[SpEEdyBL]

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.

[lincpimp]

Originally Posted by SpEEdyBL

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...