youtube

[Mark]

An old flask became my latest jam jar jet snorkeler, a square version.
Kimax Volumetric Flask Jam Jar Jet Snorkeler
https://www.youtube.com/watch?v=R9GTEybNcQQ
And a One Liter Volumetric Flask Jam Jar Jet Snorkeler
https://www.youtube.com/watch?v=L1m6W80OmKI

[tufty]

Nice. Good to see you're still at it.

[Mark]

Nice. Good to see you're still at it.

Thanks, things have slowed down here but I still keep trying stuff.

[Mark]

"But rotation around what?"
Dartmouth Professor Discusses Foucault's Pendulum
https://www.youtube.com/watch?v=aMxLVDuf4VY&t=101s

[Mark]

Spinning tops from the sea
https://www.youtube.com/watch?v=DdlQ0cM4uU0

Finger top spins 4 hours in the vacuum.
https://www.youtube.com/watch?v=Xah0ONSoq1k

[Mark]

Interesting ending
https://youtu.be/ksw3V8MXZKw?feature=shared

[Tim36]

Interesting ending
https://youtu.be/ksw3V8MXZKw?feature=shared

I saw this video a recently, it reminded me of the forum and made me take a good hard look at myself, primarily due to the distinct lack of pulse jets in my life. I did pursue a career in engineering because of how fascinated I was(am) by them, after all!

I'm glad to see there are others keeping the interest alive.

[Mark]

For one of those intermittent unstable contraptions, the effect of building some feedback, albeit momentarily, it was a somewhat unusual transition, for not having any typical fueling feeding it.
https://www.youtube.com/watch?v=OuwNt4WLnyg

[Mark]

Simple experiment with a cylindrical stainless steel cabinet knob
Acceleration of a Spinning Top
https://www.youtube.com/watch?v=DE9svCNR4So

[Mark]

A spike nut slowly building up to a high speed.
https://www.youtube.com/watch?v=A4DLpYVHbeI

[Mark]

I got a CM-6 10mm spark plug to buzz by running it upside down on this acrylic sheet, but here's an even smaller upside down 1/4 32 glow plug slowly getting up to speed. It's noisy for a small spinning top.
Glow Plug Spinning Top
https://www.youtube.com/watch?v=PoKMmjUdC9g