Date: Mon, 25 Nov 2002 09:50:59 -0500

Author: Gerald Zani

Subject: EM coil for propulsion



Anyone know how to discharge a large current through a coil of wire to
propel an object?

Something akin to 5k10.90 where a large capacitor forces a high current
through a coil and causes the can to be pinched. But in this case the
large current is used to force a coil of wire to extend outward like a
spring. The expansion of the coil is used to propel an object.

I am told that this demo is done at some schools to propel objects in
underwater and in liquid helium. It is not listed in the Bib. I would
like some details about the coil of wire and the amount of current.


Gerald Zani e-mail:
Manager of Demonstrations phone: (401) 863-3964
Department of Physics FAX: (401) 863-2024
Brown University Providence, RI 02912-1843 USA


Do a little more of that work which you have confessed to be good,
Which you feel that society and your most Just Judge rightly demand of you.
Cultivate the tree which you have found to bear fruit in your soil.
If you have any experiments you would like to try, try them.
Now's your chance.
Henry David Thoreau, Journal entry, 1850.