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Mark
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Re: youtube

Post by Mark » Tue Jul 30, 2024 9:19 pm

Presentation is Everything

Mark
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Re: youtube

Post by Mark » Mon Aug 05, 2024 8:29 pm

SKYMECHMAN Building A Gasoline Gatling 4.4 Pound Thrust Pulse Jet Engine RTR
https://www.youtube.com/watch?v=k9FdN2cnh6A
Presentation is Everything

Mark
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Re: youtube

Post by Mark » Tue Aug 13, 2024 9:00 pm

This motor brought to mind my little wheel motor which also uses expansion and contraction to propel objects.
Piezoelectric motor
https://www.youtube.com/watch?v=uFZsH62ewYo
Little Wheel Motor
https://www.youtube.com/watch?v=9jKUXVG8duE
Or this ...
https://www.youtube.com/watch?v=Se1hlK7twzc
Last edited by Mark on Tue Aug 13, 2024 9:02 pm, edited 2 times in total.
Presentation is Everything

Mark
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Joined: Sat Oct 11, 2003 10:14 pm

Re: youtube

Post by Mark » Tue Aug 13, 2024 9:00 pm

Double post
Presentation is Everything

Mark
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Re: youtube

Post by Mark » Mon Aug 19, 2024 1:44 pm

Maybe the first solar-powered putt-putt boat - no moving part - no candle - raw footage.
https://www.youtube.com/watch?v=IlfabA4Sv8o
Presentation is Everything

Mike Everman
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Re: youtube

Post by Mike Everman » Tue Sep 10, 2024 3:40 am

Cool. I’ve always wanted to make a biggish puttputt
Mike Often wrong, never unsure.
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Mark
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Re: youtube

Post by Mark » Tue Sep 10, 2024 8:53 pm

Mike Everman wrote:
Tue Sep 10, 2024 3:40 am
Cool. I’ve always wanted to make a biggish puttputt
In part it seems like a question of balance, matching the exhaust tube and chamber volume to harness the effect. And surface area ...
https://www.youtube.com/watch?v=bDItSUeykrA
Small ones are interesting too, I wonder just how small you could make one?
https://www.youtube.com/watch?v=8vKvYuzSeXg
Presentation is Everything

Mark
Posts: 10951
Joined: Sat Oct 11, 2003 10:14 pm

Re: youtube

Post by Mark » Mon Sep 30, 2024 7:20 pm

Cutting mirrors with Diamonds
https://www.youtube.com/watch?v=ZPTFFPLOzCw
Presentation is Everything

Mark
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Re: youtube

Post by Mark » Mon Oct 21, 2024 7:38 pm

And now for something completely different
Rock Salt Moving on Aluminum
https://www.youtube.com/watch?v=kuxJptidqsQ
Presentation is Everything

Mark
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Re: youtube

Post by Mark » Thu Nov 07, 2024 11:20 pm

Just an odd thing to try
Tequila Salt Shot Glass Wobble
https://www.youtube.com/watch?v=_jeEsPB9lKs
Presentation is Everything

Mike Everman
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Re: youtube

Post by Mike Everman » Sun Nov 17, 2024 5:05 pm

Mark wrote:
Tue Sep 10, 2024 8:53 pm

In part it seems like a question of balance, matching the exhaust tube and chamber volume to harness the effect. And surface area ...
https://www.youtube.com/watch?v=bDItSUeykrA
Small ones are interesting too, I wonder just how small you could make one?
https://www.youtube.com/watch?v=8vKvYuzSeXg
I can think of a couple of ways to make it more scalable, if you add a flapper valve.

That little one goes great!
Mike Often wrong, never unsure.
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Mark
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Re: youtube

Post by Mark » Thu Dec 26, 2024 8:35 pm

Some more toying with heat as a mode of motion experiments.
Stainless Steel Salt Shaker Spins on a Stove
https://www.youtube.com/watch?v=ac1gZXdGtnk
Food Chopper Top Rocks when Heated
https://www.youtube.com/watch?v=-CJ3o8ThKtg
Reversing Rattleback Variations with Heat
https://www.youtube.com/watch?v=rvrlHwMT3C8
Gore's Ball with a Gazing Ball
https://www.youtube.com/watch?v=B2-2QavWE40

Related Topics
How Do Celt Stones Spin On Their Own?
https://www.youtube.com/watch?v=gCxEU26EQ5A

Tim Rattles his Rattlebacks
https://www.youtube.com/watch?v=11NHjiEYnI0

https://en.wikipedia.org/wiki/Rattleback
Presentation is Everything

Mark
Posts: 10951
Joined: Sat Oct 11, 2003 10:14 pm

Re: youtube

Post by Mark » Wed Jan 22, 2025 8:50 pm

This was interesting how the flame front doesn't advance up the tube with even with mixed pure O2 and methane, being so narrow. And the flexible diaphragm with the combustion going on. Still he's not going to be able to carry/compress much pure O2 and CH4 if he sticks with that design. It reminded me of the simple tiny valveless pulsejets which often defeat the purpose, and have an ungainly tank to run them.
Why Are Scientists Making Robot Insects?
https://youtu.be/H6q6pYZ9Fho?t=956
Presentation is Everything

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