# Electromagnetic Propulsion

by ecocentral
Tags: coil gun, electromagnetic, electromagnetic coil, iron tube, propulsion
 P: 4 I am interested to know if a copper coil wrapped around a iron pipe could be used to propel another iron pipe capped at both ends through the larger pipe with the copper coil around it? I am thinking that the larger iron pipe would need to be slotted from end to end and insulated from the copper wire insulated coil. inside the outer pipe, the smaller pipe with end caps would need to be insulated from the larger pipe with a non conductor such as cardboard, air or both. Consider dc, pulse and ac There are alternate positions for magnetic coils but I want to look at this option first.....jim
 P: 383 Yes. I'm assuming that the coil is wrapped around the outside of the larger, stationary pipe and is insulated from it. The smaller pipe fits within the big pipe snugly but not tightly and is lubricated so that it can move freely through it - even with substantial side forces. The coil would then be energized to draw the small pipe in and then turned off as the smaller pipe moved through the center. You would then need to depend of momentum to keep the smaller pipe moving the rest of the way through.
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 Quote by ecocentral I am interested to know if a copper coil wrapped around a iron pipe could be used to propel another iron pipe capped at both ends through the larger pipe with the copper coil around it? I am thinking that the larger iron pipe would need to be slotted from end to end and insulated from the copper wire insulated coil. inside the outer pipe, the smaller pipe with end caps would need to be insulated from the larger pipe with a non conductor such as cardboard, air or both. Consider dc, pulse and ac There are alternate positions for magnetic coils but I want to look at this option first.....jim
Why use an iron pipe for the outer pipe? Even with some slots, you have a ferrous material in the way of the magnetic field, which will partially shield the inner ferrous pipe from the coil's magnetic field. Slots mainly help with eddy currents, which wouldn't appear to come into play given your problem statement.

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