Board Thread:General Nerf discussion/@comment-27306930-20180909005505

I got my hands on a couple pair of new Artifact 4MU motors. These things claim to get 50,000 RPM on 2S (7.4 volt) batteries.

They are 132 motors, so they're a tiny bit longer and wider than standard 130 motors. Rather than cutting a hole in the side of the shell, I decided to try widening the interior compartment with a Dremel. And it worked. I thinned the shell just enough to provide the extra 1/8 inch it needed. I also opted to settle for the stock flywheel cage until I figure out whether I like these motors.

Well, these motors are definitely screamers. They make quite a din. I'll capture a little video once the shell is back together.

On a side note, there's something wrong with the specs on these motors. They are definitely 7.4 volt. Based on the sound, they are definitely faster than 34K motors I typically use. But 1 amp can't be right. Based solely on the weight, I suspect the stall current is around 20 amps. The no-load idle current might be as low as an amp.

The mystery continues ... 