Lol. 3D printed electric SC makes 5psi…| Grassroots Motorsports forum |

Countingcrowbars UltraDork
8/3/21 7:54 p.m.

And nearly killed someone.
https://www.reddit.com/r/3Dprinting/comments/ots4gj/3d_printed_supercharger_in_polycarbonate_makes/

3D Printed Supercharger in Polycarbonate makes 5psi at 50,000 rpm and explodes in my face. Built this a few years ago, reckless mistake, but worth sharing. from 3Dprinting

Mr_Asa PowerDork
8/3/21 11:39 p.m.

Before reading, gonna bet that he didn't account for deflection at speed and got some rubbing till boom.

Edit: Nope, guy sounds like he has his engineering head on straight. This appears to be a wobble at high speed from the unsupported end of the shaft due to an imbalance in the print.

MrJoshua UltimaDork
8/4/21 5:13 a.m.

Lol-I love the testing stand.