Odds and ends

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Mark
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Re: Odds and ends

Post by Mark » Sat Mar 26, 2022 3:50 pm

Maybe in a vague way, this external combustion engine could be said to be snorkeling.
Thermoacoustic Puffer Test
https://youtu.be/UaIc077eJWc
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Mark
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Re: Odds and ends

Post by Mark » Sat Mar 26, 2022 9:05 pm

Thermoacoustic Fan
https://youtu.be/LP7HbR-R-X4
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Mark
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Re: Odds and ends

Post by Mark » Thu Apr 14, 2022 8:05 pm

A few simple hot air engine variations toyed with recently ...
https://youtu.be/7LKlVNzUqts
https://youtu.be/kXn90VcrEt0
https://youtu.be/oDmC-wECzMw
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Mark
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Re: Odds and ends

Post by Mark » Sun Apr 17, 2022 12:59 am

I liked this one I made, just two test tubes inside a larger tube.
https://youtu.be/EosXGSEvkuU
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tufty
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Re: Odds and ends

Post by tufty » Sun Apr 17, 2022 6:25 am

That's beautifully simple, Mark.

Mark
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Re: Odds and ends

Post by Mark » Sun Apr 17, 2022 7:51 pm

Here's a smaller version I was fiddling with, a little fussy sustaining but just started toying with it so maybe I can get it to do better later on.
Testing a Tiny Culture Test Tube Stirling Free Piston Engine
https://youtu.be/LhLkJsuyXCw
https://youtu.be/trCiuU69YcE
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Mark
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Re: Odds and ends

Post by Mark » Tue Apr 19, 2022 4:30 am

Got it to run for about three minutes but only started the camera after deciding it was going to sustain. Still I have to wonder why it decided to stop after 3 minutes .
1.3 Gram Test Tube Piston with Longer Run Time
https://youtu.be/GRZMBTAVbso
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Mark
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Re: Odds and ends

Post by Mark » Fri Apr 22, 2022 3:44 am

These are 6 mm borosilicate test tubes oscillating in an 8 x 6 mm quartz tube, a vertical test. Funny by adjusting the freedom of the stroke with the silicone rubber band you can hold the engine in yor hand and it's impervious to motion and yet most times it likes a solid table surface to resonate on, to keep the rhythm. Like here on this flimsy table, the flexing dampens feedback. Notice how smooth it runs once it settles down.
https://youtu.be/R7FXZXtoHfk
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Mark
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Re: Odds and ends

Post by Mark » Tue May 03, 2022 2:00 am

First Attempt of a Springbot Free Piston Stirling Engine
https://youtu.be/oLc2mjLKV2c
https://youtu.be/Tgrim7z7A2k
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tufty
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Re: Odds and ends

Post by tufty » Thu May 05, 2022 7:50 am

Those are absolutely mental, Mark. Proper made me grin.

Mark
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Re: Odds and ends

Post by Mark » Tue May 10, 2022 10:25 pm

An odd thing I tried to play ...
Rudimentary Thermoacoustic Walking Cane Flute
https://youtu.be/v22bJsGKOF4
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Mark
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Re: Odds and ends

Post by Mark » Thu Jun 23, 2022 11:16 pm

Kind of an interesting shape with no seams.
https://gourmetkitchenworks.com/collect ... lly-500-ml

It's the same volume as this Erlenmeyer Flask jam jar jet I ran.
https://youtu.be/mDrdUy-LWHY
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