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Threadlike streams of "Electric wind"
Page 2: Hardware Details


IMPROVED HARDWARE

I found a better way to create "air threads": electrify the dry-ice water pan, then use grounded objects as air-thread emitters (use your hand for example as in the Fig. 1 photo.) I placed my aluminum cookie sheet upon insulators (plastic cups), filled it with about 1cm deep of hot water, placed a piece of black paper in the water for contrast, then dropped a couple of pellets of dry ice into the water in order to create the mist layer. I expect that an ultrasonic humidifier could also provide the mist layer instead of dry ice. [NOPE. THE FOG FLOATS TOO HIGH, RATHER THAN INVADING THE BOUNDARY LAYER AS THE DRY-ICE FOG DOES.]

[GIF: click to download]

Fig. 3 A setup for creating and viewing electrostatic "Air Streams"
( The air streams are invsible, but they make dots in the fog )


I'm using an old negative ion generator as the power supply. It puts out 10uA maximum, and maybe 10KV to 15KV. Very safe. If you want to duplicate these phenomena, an electrostatic generator is best. Don't electrocute yourself with a DC high voltage power supply! For example, place a tabletop VandeGraaff machine on the table near the cookie tray, and connect the tray to the generator's sphere by using wire and tape.

If your hands are extremely dry, they won't make any air-threads. If they are clean and lint-free, then no threads appear. I find that if I wet my fingertips and then stroke them briefly across my shirt, then plenty of fibers adhere, and my fingertips will then create loads of furrows when I sweep them across the fog. [HEY!!! If I get my fingers *really* wet, then no lint is necessary. Strong threads appear for awhile, but then they go away and I must re-wet my fingers. Also, Dale T. reports seeing threads coming from oil-wetted metal.]

NEXT PAGE: Experiments to date


 





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