Yeah that was my first thought too. That motor isn't going to be happy running flat out for very long.

Does the movement not generate enough cooling from wind? Do you need heat sinks or active cooling?

They're designed for planes and the prop drives significant air for cooling. You could replicate this if you wanted, but it would be really hard to draw enough power to overheat this. You'd have to be going up a long steep mountain or be going ludicrous speeds.