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View Poll Results: is it feasable to use magnetic weaponry as our primary offensive weapon?

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Thread: sand jamming fixable with magnetic weaponry?

  1. #1 sand jamming fixable with magnetic weaponry? 
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    as any military enthusiast, and most of us with common knowledge know, our m4 and m16 weaponry gets jammed up by sand in the middle east. this is just one of many problems also including the tiny firing pins that if broken will not let the weapon fire. :(

    i think all this could be fixed by a magnetic weapon, not a railgun(i read slayer's project and decided that we'd have too many problems making it workable because of melting). however i belive that rather than using the laurentz force to propell an already moving object down a barrel, one could build an electromagnet at the end of a tube, surrounding it. said magnet would have to be relatively strong, perhaps multiple magnets running down the barrel would be needed. the first problem i see with this is that once the projectile travels past one of the magnets the force would slow the object down, one could use photogates set to turn the magnet off and put the next one on placed just in front of the magnet so that it would not resist the acceleration of the object down the barrel. if the military used this tech then the only moving part would be the bullet and the only maintenance is cleaning a smooth(or rifled) barrel, and replacing any melted wires between the power source and the electromagnets. very simple and best of all perfect for blasting a hole in something even in a sandstorm. :D

    i'm trying to build a scale model to punch a hole through a cynderblock at 20 meters, if anyone has any recommendations as to common supplies that would best be used for this project please help


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  3. #2  
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    How do propose to power this thing?


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    First of all as far as I know your better off with a bunch of sequenced coils rather then one big one at the end. The problem with one at the end would be the massive amount of power that would be needed to create a magnetic flux powerful enough to attract an object from far enough away for it to gain sufficient velocity.

    By using a series of coils carefully timed you can get an object moving with the first coil, turn off that coil at just the right nanosecond and get the next coil fired up to continue the momentum. You would do this down the length of the barrel cycling each coil at precise moments. The longer the barrel the faster in theory you could get an object moving. There are of course limits to everything. Keep in mind the timing on this device would have to be perfect or you would end up slowing down your object or loose the magnetic "grip" on it to pull it along.
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    Timing is not the problem, the problem is down to the speed at which the magnetic field collapses after the projectile has passed. Currently each magnet is switched off before the projectile reaches it such that 'pull back' does not occur. It takes a finite time to discharge a magnetic field as it does for a capacitor. THinking of this for a few minutes I wonder whether each magnet could be left switched on ?

    Without doing the maths, here's the idea....

    The projectile has a small electromagnet within it, as it passes each coil it's own field is reversed repelling it from the last and attracting to the next (the main coils are alternatively polarised). It is possible to provide power to the projectile via the action of switching on the successive magnets, thus inducing a pulse, charging a capacitor. At which point mentally holding all these fields in my head and visualising their interactions begins to hurt..

    The power supply is not a problem, about 3 kilos in weight, charged with modern solar cells (there are now fabrics which produce electricity when exposed to light).

    At which point I lose interest in this subject and wander away to cause distress elsewhere..
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  6. #5 Re: sand jamming fixable with magnetic weaponry? 
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    Quote Originally Posted by saul
    as any military enthusiast, and most of us with common knowledge know, our m4 and m16 weaponry gets jammed up by sand in the middle east. this is just one of many problems also including the tiny firing pins that if broken will not let the weapon fire.
    Broken firing pins are not a serious reliability issue in AR series rifles and failure to fire is rarely related. Feed malfunctions are where the system trips up. You'll still need to feed a magnetically powered future gun.
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  7. #6  
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    as far as the military is concerned, the internal magnet seems to be the best for limiting the power consumption and delicacy of the machine, however for my purposes i doubt i'll be able to make an electro magnet inside of something small enough to fit in the barrel i'm using, i might try two models, one using home200's idea, one with insanity's idea

    as for the problems with feeding, are you reffering to the jamming where the round passes from the clip into the weapon, or are you reffering to the ejection of spent rounds? are these problems also related to the sand, i didn't have any trouble shooting over 100 rounds down range with an m4 during my time in the states.

    another reason to have this weaponry, even if it doesn't adress the sand jamming problem as i'd hoped, it will still be more effecient, if i can make something that fires automaticly it will use more of the energy i provide for accelerating the projectile rather than heatingthe weapon as the current guns do. and as far as i've gotten now, cleaning is a breeze when the only thing to take care of is the barrel and an electromagnet.
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  8. #7  
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    Quote Originally Posted by saul
    as for the problems with feeding, are you reffering to the jamming where the round passes from the clip into the weapon, or are you reffering to the ejection of spent rounds? are these problems also related to the sand, i didn't have any trouble shooting over 100 rounds down range with an m4 during my time in the states.
    If you're really interested, first read up a bit on basic weapon mechanics. It's much more complicated an explanation than I can provide in a few sentences. And firing only 100 rounds at a range will not produce a stoppage.

    Quote Originally Posted by saul
    another reason to have this weaponry, even if it doesn't adress the sand jamming problem as i'd hoped, it will still be more effecient, if i can make something that fires automaticly it will use more of the energy i provide for accelerating the projectile rather than heatingthe weapon as the current guns do. and as far as i've gotten now, cleaning is a breeze when the only thing to take care of is the barrel and an electromagnet.
    There's a lot more to a gun than the firing mechanism. How is it fed?

    It sounds like (In)Sanity was describing a Gauss gun, which actually is a working design. I know a couple engineers who have built similar devices. I don't mean to say this in a rude way, but I don't think you'll be able to build something that puts projectiles through cinder blocks using information you collected from a forum. It's kind of like a high performance sports car. If you have to ask, you can't afford it.
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  9. #8  
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    What you are trying to build is in fact a high-acceleration linear motor.
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