5/16/2002: Quarter shrinking machine

Undertoad · 05-16-2002, 10:56 AM

OK, not exactly a quarter shrinker, but a quarter re-sizer; the quarter gets thicker as its diameter shrinks.

But what's wild about this is how it's done: by creating a massive magnetic field. From the site:

The quarter shrinker uses a high voltage capacitor bank and a triggered spark gap to apply up to 125,000 amps through a small work-coil of #10 AWG magnet wire which surrounds the coin. Once the spark gap is triggered, a current of over 1 million amperes in induced into the coin, and the interaction of the induced magnetic field and the field from the coil cause the coin to shrink radially-inward. At the same time, the work coil explodes into copper shrapnel, and then into a 8" ball of plasma. This all occurs in about 20 millionths of a second. The experiment is done under a bulletproof Lexan blast shield. It's a very energetic and dangerous process - don't try this at home folks... :^)

The guy also has a huge tesla coil and a lot of really wild images featuring that. Here's his page (with images that load pretty slow):

http://navarrone.com/tesla/tesla4.html

05-16-2002, 10:56 AM	#1
Undertoad Radical Centrist Join Date: Jan 2001 Location: Cottage of Prussia Posts: 31,423	5/16/2002: Quarter shrinking machine OK, not exactly a quarter shrinker, but a quarter re-sizer; the quarter gets thicker as its diameter shrinks. But what's wild about this is how it's done: by creating a massive magnetic field. From the site: The quarter shrinker uses a high voltage capacitor bank and a triggered spark gap to apply up to 125,000 amps through a small work-coil of #10 AWG magnet wire which surrounds the coin. Once the spark gap is triggered, a current of over 1 million amperes in induced into the coin, and the interaction of the induced magnetic field and the field from the coil cause the coin to shrink radially-inward. At the same time, the work coil explodes into copper shrapnel, and then into a 8" ball of plasma. This all occurs in about 20 millionths of a second. The experiment is done under a bulletproof Lexan blast shield. It's a very energetic and dangerous process - don't try this at home folks... :^) The guy also has a huge tesla coil and a lot of really wild images featuring that. Here's his page (with images that load pretty slow): http://navarrone.com/tesla/tesla4.html

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