Ruben's Tube Tests

[reivilo]

turn the flames down or make smaller holes... plus add audio dude.

[EdwinWiseOne]

No, the point isn't to make a good Ruben's tube that shows the waveform, the point was to make BIG FLAMES that react to music. I'm going to make a new video of the final tubes once I carve out some time. Maybe this weekend.

[morrisbeard]

How long is the tube? Is that fence post? How far apart are the holes?

[EdwinWiseOne]

The tube is made of 5' HVAC sheet metal tubes, 4" dia, and the holes are 1/2" apart but alternate large and small diameters. I hope to put more details and pics on simreal dot com this weekend. I also have another vid of a variation on this device here in YouTube.

[morrisbeard]

Thanks!

[EdwinWiseOne]

Okay, my doco is up now, with links to this vid and the other one. Go to Simreal dot com, Machines icon, RubensTube!

[kilmarde]

more fire = better demonstration, compared to other vids. but outside w/ wind....still, science is cool

[MasterGohring]

So, what exactly is this?

[EdwinWiseOne]

Aha! A Ruben's Tube is, traditionally, a physics demonstration that shows sound waves in a gas. Audio is pumped into a tube of flammable gas, and the high pressure and low pressure areas create jets of flame of different heights in holes along the tube. Mine is more of an art project, though.

[EdwinWiseOne]

Nah, the audio was pretty boring -- a lot of it was subsonic! Maybe at the end it would have been handy. I'll figure out how to get audio to work sometime and do another video later.