Rail Gun

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Introduction: Rail Gun

Building a railgun in 15 minutes. The railgun is a device for accelerating an object by running electric current through it along a pair of rails.

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:( can someone help me i made this but when i did it the 2 magnets on the nail stuck to the aluminum foil instead of flying off

the projectile needs to already be moving forward, otherwise it will just be welded to the "rails".

Cool but a stronger magnet is needed

Instead of gluing foil just use aluminum duct tape used to seal A/C ducts. It will stick to just about anything !

Can you use more power to make it more powerful?

HAHAHA, now kids if you're crazy like you take this to a whole new level buy using a microwave transformer and aluminum pipes from home depot and scare the s**t out of yourself when you fire it, then a year later propose to rebuild it and make it "better"

Personally, I would call this a hompolar motor, not a railgun.
Also, what is the orientation of the magnetic field of the disc magnets? Axial, or diametric?

A railgun is a series of electromagnets which get turned on and off in sequence to propel the projectile... So…

No. What you mean is a coilgun. A railgun uses a different mechanism, like Wikipedia says:
"A railgun is an entirely electrical gun that accelerates a conductive projectile along a pair of metal rails using the same principles as the homopolar motor. Railguns use two sliding or rolling contacts that permit a large electric current to pass through the projectile. This current interacts with the strong magnetic fields generated by the rails and this accelerates the projectile."