[ChuckMcM]

Sounds cool, but even a 95% efficient 2kW brushless motor would be dissipating 100W of heat. Not easy to dump in a small package. I've never tried building a skateboard but I've built quite a few mobile robots (and a few battlebots). Wish they had a bit more detail on the tech.

[skdoo]

Part of our tech is very efficient, compact, and (relatively) cheap brushless motor controllers. It's not easy.

[jonnycowboy]

How are you cooling the motors?

[indiecore]

I'd assume that you'd have a rad over the bottom of the board and the motor housing that uses the air going by as it moves to dump the heat. At least that's my first idea, since I'm not a skateboard engineer it's probably not even close.

[sbierwagen]

They'll just be air-cooled: 2KW motors in a skateboard are going spend very little of their time running at max load.

I of course have no idea what the average load is, but a reasonable wild ass guess is ~100W.

[ChuckMcM]

My experience with DC motors was that they got hottest when starting and stopping, that was the result of a high current demand for torque and relatively low operating speed with meant minimal airflow. If you're going up a hill you're easily burning 1 - 1.5 HP or a .75 - 1kW of power. They look very cool, can't wait to see one 'in the flesh' as it were.