Rail guns.

AuthorWilson, Tom
PositionReaders' Forum

* Your "Viewpoint, An Inexpensive Solution For Quickly Launching Military Satellites Into Space" in the March 2012 issue of National Defense Magazine appears to have few inaccuracies.

In the second paragraph "of 'Iranian Super Gun fame." If I remember correctly from watching the History Channel, that was the "Iraqi Super Gun" as Saddam Hussein was in pursuit of the Super Gun.

The bottom paragraph should state something to the effect that two magnetic fields are created (one for each rail) opposing each other and creating a force according to Lorentz's Force Law on the armature to repel it in the desired direction. Of course, this is dependent upon the direction of the...

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