/diy/ - Do It Yourself

[Anonymous No.1328800]

I want to build a magnetic cannon, currently the design is pic related, with the barrel being 5mm thick PVC, the magnets being 40x10x10mm Neodymium blocks, and the projectile a 30mm long and 8mm thick Neodymium cilyinder

Is this a good design? Any documentation for beginners to get an idea on how to maximize efficiency?

[ivan No.1328828]

Gauss cannons are fun. Should work, but you need a feedback system to know when the projectile is out of the barrol. Make sure to wind the windings in many layers, and in ONE DIRECTION!

[Anonymous No.1328832]

>>1328828
>you need a feedback system to know when the projectile is out of the barrol
Could you elaborate on that? What kind of system should I use?

[Anonymous No.1328840]

>>1328832
Anon thinks you are making an electromagnetic device that create and destroy a succession of fields in order to accelerate a projectile.
To me it seems you want to use fixed magnets. I'm no expert on this but i would suggest something like this wouldn't work very well,you can't expect fixed magnets to accelerate a projectile for the same reasons over unity ( "" perpetual motion" ") devices are bullshit.

[Anonymous No.1328844]

>>1328840
Well that's disheartening, I had thought it would essentially act as a less powerful solenoid, and thus work similar to a coilgun

[Anonymous No.1328854]

can be done with electromagnets, look up how the large hadron collider works. basically that

[Anonymous No.1328860]

YouTube kreosans gauss gun

[Anonymous No.1328886]

>>1328844
A solenoid pulls ferrous metal into the centre, some may appear to poke out because th e centre of mass acted on isn't balanced as you think.
A coil gun operates by turning off power to the coil as the projectile hits the halfway point so there is no force acting to pull it back into the centre of the coil and slow it down.

[Anonymous No.1329126]

>>1328886
That's why I was thinking about using a magnet as a projectile, the slanted magnets would repel the projectile that would be loaded so that it's north pole is aiming back, while the north poles of the cannon magnets would be aiming to the inside

Similar to this https://youtu.be/_c35dI77ORM

[Anonymous No.1329147]

>>1328800
>magnets
>Is this a good design?
No.
Use switched alternating polarity electromagnets to both push and pull the projectile based on it's current position.
30mm is way to short for that projectile to efficiently apply energy. You want to assist its acceleration, not dump jiggawatts for measly initial prod.

[Anonymous No.1329164]

A railgun is easier to make, just not as portable.
Just don't kill yourself with the voltage or projectile.

[Anonymous No.1330603]

>>1329126
>Using fancy magnets as basically a spring to fling your projectile
Why don't you just build a slingshot instead? You'd get about the same functionality.

[Anonymous No.1330625]

>>1328800

[Anonymous No.1330705]

>>1329126

that video was about the worst demonstration I've ever seen.