www.pulse-jets.com

Leaves enough time for the video to upload before I wake up :)

Stainless is an absolute mofo for work hardening. Annealing should be possible, I guess - from memory 304 and 316 are somewhere between a bright cherry red and a dull orange, erring on the orange side, holding for 3 minutes per mm thickness, and then let it air cool. I checked my carbide stocks, I h...

Mark, that last one is absolutely hilarious. All it needs is googly eyes :)

How bigness the carbide?

Mike Everman wrote: ↑

Sun Mar 13, 2022 9:14 pm

Any ideas or examples for nozzle shapes that promote entrainment?

I've never found anything that works better than a rosscojector.

/me edge of seat.

They look really good, man.

To counter our other argument, I'll just say "paperless office" :)

3d printed in stainless? What's the process, DMLS?

Also, are you trying to tell me I'm wasting my time fixing up an old milling machine, and the time I spent learning to weld was pissed away as well?

:)

Patenting something doesn't necessarily mean it has to be realistic. It would almost certainly be do-able (although how long the exhausts would last under centrifugal forces is questionable), but can you imagine the noise?

Oooh, I like those. There's something very sexy about control line pulse jets.

Mike Everman wrote: ↑

Sat Dec 25, 2021 1:38 pm

HAV’s for firefighting is just silly.

Oh my lord, I hadn't even seen that. It's difficult to even start enumerating the ways that is stupid.

Airships haven't been thrown out completely. They pop up occasionally, for example

https://www.theengineer.co.uk/hybrid-ai ... al-flight/

And hot air balloons are still a fairly big leisure thing, so maybe - who knows?

Merry Christmas

Ow. That does need some TLC. DIY toolholders are no problem as long as they're rigid and you can shim your tooling to the right height. A bit more of a faff than quick change stuff, but still perfectly serviceable. If you have slop, you probably want to play with the gibs a bit (might lose you some ...

Go on, let's see it.

Even a shitty lathe is better than no lathe at all.