I think a fan attachment like the the new Medisa motors are coming out with would be a good addition to any outrunner. I'd sure get one. I think some axi motors come with a fan on them?

How much voltage can you run through outrunners in general? Can you stick 10S on a ~800Kv outrunner? This is all new stuff for me.

The max RPM will greatly depend on the diameter of the motor. However, many 800kv motors won't be able to cope with more than probably 6s.

Wow. Thanks MetalMan. Looks like I will be staying with inrunners then.

you buy the fans separately, I'm not sure if any come with them. http://www3.towerhobbies.com/cgi-bin...SM&C=GHZ&V=AXS

If you can provide the proper gearing, the outrunner motors will provide the torque.

Those fans are designed for AXI outrunner motors.

They won't fit Castle motors.

Yes! Very True! :yes::intello:

For Example:

Notice BIG GEARS

http://i160.photobucket.com/albums/t...m/DSC06739.jpg

Now Watch it go

http://i160.photobucket.com/albums/t..._Produce_2.jpg

This is an E maxx powered by an AXI 2826/8 outrunner motor using 22/40 Mod 1 gearing. Not every motor can pull gearing like this and run cool.

It's not huge on top end but it's fun and efficient. This makes for longer run times. Great Mild Setup. Very Dependable.

The stator size is 28mm in diameter X 26mm long. Stator Size has a huge impact on overall performance. I'm thinking Castle did their homework on this one. :yes:

You know what would be great? I'd like to see an adapter that would let you use a spur gear as your pinion gear. Look at the picture above. Drill out a couple holes in that pinion and then you could screw the spur onto it.

Anyone think this would be a useful item?

That's a good idea. It would be cheaper than buying a few 26+ teeth steel pinions.

I'll thread in the General discussion.

Also a good idea! :lol:

There are several problems with that.

#1. Even a 25 tooth gear isn't big around enough. A 30+ tooth would be required for the threaded holes to be into the meat of the gear inwards beyond the teeth.

#2. This is some HARD stuff. The good thing about it is, it is hardened by tempering. This means in its current state, it isn't drillable. The way to overcome this is, heat it up cherry red with a torch.(acetylene torch) Then let it cool slowly in open air. This removes the temper and makes it drillable and tappable. Drill and tap. Then reharden by replacing the temper. To do this, heat it up cherry red again, then drop it into cool motor oil. Quench it, as they call it. This restores the temper and hardness. IF you attempt this, wear eye protection and be wary since there is a violent reaction when you quench it. Spatter, splatter, sizzle.

#3. How would you be sure that your holes were perfectly centered? It has to run true you know?

How about modifying the outrunner's shaft to accept a gear hub (such as a slipper clutch)?
http://www.rc-monster.com/forum/showthread.php?t=14583

I was thinking mike could make us an adapter, not modding an existing gear. BTW the thread is up.