8 Pole Heli Motor in an E Revo?

[Bondonutz]

Good stuff, Subscribed.

[Shonen]

http://www.youtube.com/watch?v=uqKrdMwD7GE

shot another short video today after I adjusted the shift point, it's better but perhaps slightly too low.

btw, this particular outrunner is only a 6 pole.

[What's_nitro?]

Nice conversion, Shonen. How much clearance is there between the motor OD and the Tekno mount ID? Obviously it works fine but if you're using the 36mm mount with that motor there can't be much clearance.....

[Shonen]

Thanks! The inside of the motor mount is roughly 40mm so there is quite a bit of wiggle room. I recall I tried to stuff the 1515 motor in it, I think the only reason why it wouldn't go in was cause of the fins. I didn't take a photo of the clearance but this outrunner has a 36.4mm diameter...compare this to a 540 motor (36mm diameter):



it's kind of hard to see cause of the lighting but look at the bottom. plenty of room. (:

[What's_nitro?]

Ahh....thanks.

I thought the Tekno mount was more of a snug fit for heatsinking ability. In that case I may need to buy a 44mm Tekno mount and try to stuff a 42mm outrunner in it. :)

[Shonen]

The heatsink rib looking things are just added to the bits that connect the front and rear lol. The extra space is mainly so that you can attach a 40mm cooling fan to the top and it would still have enough room for air to go around the motor. I think it would've been better from a cooling standpoint to have the sides closed and have a larger bottom opening to better shroud the motor and force air around it, but I suppose it needs to work without a fan too.

If I was starting from scratch I would've done exactly the same thing, but I had this 36mm mount laying around from an eBay bulk auction. 42mm opens possibilities for more powerful motors. (: The best part of running an outrunner is you don't have to get some super long motor that comes really close to the rear suspension arms.

[BrianG]

I like the fact that outrunners do make lots more torque, but personally, the advantages are outweighed by the disadvantages:
- Open design, more prone to rock/pebble damage
- Slower speeds require more thought on gearing. Direct drive setups leave little "gearing" adjustments unless you want to change diffs or tires.
- larger diameter makes motor mounting in a geared setup more difficult
- heat producing coils are inside the motor - I personally prefer the heat source to be outside where air flow is greatest. Although, the turbulence created by the motor itself is probably sufficient.

Still, it's nice to experiment!