Thanks for the correction! I got way ahead of myself.

When wind speed doubles, the energy it carries increases eightfold,

Edit: I’m wrong, see edit below!

Huh? Kinetic energy increase is square, not cubic.

KE=1/2 m v^2

So every doubling of speed should increase the available kinetic energy by 4 times, not 8. 3 times the speed is 9 times the energy. Granted there are probably some efficiency gains in excess of this at the low end, but as a rule that’s just wrong.

Edit: Cool, I learned something new! I neglected to consider it in terms of power, just thought about kinetic energy.

So something like: KE = 1/2 m v^2

= 1/2 ( rho V) v^2

= 1/2 ( rho A d) (d/t)^2

= 1/2 rho A d^3 1/t^2

Where P = KE/t

Thus:

P = 1/2 rho A (d/t)^3

= 1/2 rho A v^3

Lots of other aspects I’m sure I have wrong, but I see how the cubic came to be.

Yeah a lot of those look moderately benign (waving away media, for example). Best case scenario it’s an unfortunate habit what happens to make him look like a Nazi… At the same time, I’d expect someone to break the habit to distance themselves from it.

This isn’t new, right?

Absolutely, it’s a fabulous engineering challenge, to make it work well on a hobbyist grade 3D printer with ordinary materials. Also a lesson in using the right tool for the right job (some parts are just better off milled or bought OtS)

I used to frequent the FOSSCAD IRC ages back as a teen. This started during the post-Liberator panic, there were talks about regulating 3D printers to not allow printing guns, etc. Designed a few things, never actually printed any of it myself, but some others did. Really got me into engineering before I exited the scene, led to actually pursuing an engineering career. Was surprised to see 3D printed gun videos so openly shared, it was pretty underground for ages there.