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Coil Gun Answered

Hello!
I have a question. I have been looking at making a Coil gun lately and i had an idea for a simple one. Just need to know if it would work. Basically:
Battery-->Switch-->Diode-->Transformer-->Coil

For my Coil I am using a coil from a Pinball Machine Flipper. Just An Idea for makers of a coil gun.

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Downunder35m

3 years ago

There are several problems to address when it comes to working coil guns.
The first would be the power, usually provided by capacitor banks.
The next is that you need several stages to propel the projectile - these must be timed perfectly.
A single stage "coil gun" is not much more than a relay or in your case a a flipper.
The trick is to get all stages sycronised so that the projectile can be accelerated fron one stage to the next until reaching final velocity.
Don't see any problems in your circuit for a single stage but as said one stage simply isn't enough.
If you do some decent searches on Google you can find iages of working coil guns used by the military and they all have one thing in common - the actual gun is several times smaller than the space for the capacitor banks.
In fact most operate at power levels that would simply fry the coils if used in fast repetition and require decent cooling.

A more efficient way of distributing the enegry is to provide a magnectic field that is induced into the projectile - forcing it to work against the magnetic field generated by the coils in use.
Here the magnectic field inside the projectile forces the projectile to move to the next stage, with good timing this stage will increase the speed.
Downside of this is that you need some means of providing the power without causing too much of a burn out on the projectile.
Simple guns used conductive grease or just graphite covered projectiles.

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gmoon

3 years ago

What's the diode for?

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Kiteman

3 years ago

Try it and see!

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BionicBKiteman

Reply 3 years ago

I dont want to build it and find out it dont work. Though I would ask.

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KitemanBionicB

Reply 3 years ago

Hey, if you've got the parts, all it will cost you is an hour or two of you time - at the very worst, you'll finish up slightly better at soldering!