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(Gizmag)   From the man who brought you the flamethrower glove, the wrist mounted crossbow and the rotary saw blade crossbow, I present the homemade Gauss Rifle   (gizmag.com) divider line 35
    More: Cool, electromagnetic pulses, saw, milliwatts, gloves, coils, Patrick Priebe, gamers, capacitors  
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24325 clicks; posted to Main » on 04 Sep 2012 at 4:34 PM (1 year ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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Archived thread
2012-09-04 07:00:53 PM
2 votes:

elkraf: This thing is great! I would like to buy one. It's not a firearm so BATF (or whatever they call it) would not get involved. Or they might change their name to BABFM (Bureau of Booze, Firearms and Magnets).


Don't give them any ideas.
Those jackwagons have turned mission-creep into a god damned art form.
2012-09-04 06:37:13 PM
2 votes:
Very good, but he's only leveraged half the advantage of the Gauss rifle, which is obscene muzzle velocity. The other is obscene rate of fire, and his 8-shot semi-auto doesn't even pretend to, er, shoot for that. Possibly due to legalities, which wouldn't surprise me at all.

Unlike conventional chambering firearms, a full-featured Gauss rifle doesn't have any moving parts that are critical to the action, doesn't need to eject a sabot, and doesn't need to go through a reload cycle. It can instead operate continuously, firing literally as fast as you can get rounds into the 'chamber' (start of the raceway). A gravity-fed hopper magazine might achieve extremely scary rates of fire.
2012-09-04 05:14:43 PM
2 votes:
I got 250FPS out of a Mcdonalds straw, some spare wire and a camera flash. Granted, I was firing penny nails, instead of big ass slugs, but still.

Once again, the only reason that coil guns and rail guns aren't used in the military (much) is because to really get any output, it takes a LOT of power. It also takes a lot of specialized power gear to create the pulse form just the way it should be (I'm guessing this guy didn't bother with pulseforming) All that gear weighs a LOT, so man portable versions are either underpowered, or just too damn heavy.

Rail guns are different... all the same problems with the electronics, and in addition, the rails wear very very quickly due to plasmic electrolysis. Basically, they eat themselves. However, as a bonus, it's not hard to break the sound barrier with a big ass projectile. It's why the navy likes them. Over the horizon targeting, combined with supersonic projectiles combined with very very good ballistics... all together and you've got a really long range cannon with massive firepower.

Now, the military has come up with something even better. They used a linear accelerator (it's a ring) to bring .50cal ball bearings up to a very high velocity inside the ring. Then, when you hit the trigger, it releases 3-5 ball bearings down the barrel. The impact energy is 10x higher than a Barret 50 cal rifle at the same range. They are currently using these as Humvee mounted weapons in Iraq... or at least they were using a few as a test, I'm not certain how that testing went.

Anyone that wants to build a coil gun can. It's not even very hard. Can you solder? Can you handle Hicaps? You're good to go. Building a rail gun that actually works, that's a whole different ball game. The sensors this guy used wouldn't work, and generally speaking you have to use optical switching just to keep up with the projectile velocity. Also, your pulse has to be formed especially well, and in the correct phase variance. That is not easy or cheap, and especially it isn't light weight. Coil guns though, can be built with a disposable camera flash unit, a straw and some copper wire (15 gauge or bigger, you don't want liquid copper on you). That would give you a single stage unit. Mine got about 250fps shooting penny nails with the head ground off.
2012-09-05 12:45:30 AM
1 votes:

Cthulhu_is_my_homeboy: Publikwerks: albuquerquehalsey: toraque: Cthulhu_is_my_homeboy: cretinbob: That's not a gauss gun, that's a rail gun.

TFA says it's a multi-stage coilgun.

Also, cool as it is, it's only about as powerful as a BB gun. Actually with the right pellets, my Crosman Phantom air rifle has about twice as much muzzle energy. Sadly it's not semi-auto, though.

From the video, it's actually pretty small, about pistol sized. I don't know the engineering enough to judge whether or not you could expand that design from four stages to N, but I'm thinking a rifle length set of coils with the batteries and capacitors in a backpack might put it past the air rifle stage.

And then it would still be inferior, in every possible way, to this: 

[www.allmilitaria.com image 631x386]

I dunno, it was pretty damn quiet

If you used a heavy, subsonic projectile there might be a niche for Gauss guns as a silent weapon. The velocity wouldn't have to be all that high if you were tossing a 2 oz steel rod at somebody's skull. Maybe 400, 500 feet per second. That'd give you about the same energy as a .45 Colt but with twice the momentum. It would do Bad Things to a human, and being steel, would be more effective against light armor and obstructions.

That is, as long as charging the caps didn't make an incredibly loud high pitched noise. And you were willing to carry around a huge battery pack. To get 600J with 3% efficiency you'd be burning through about 500 mA-hr a shot from a 12V battery.


supercapacitors charge bloody fast and REALLY quiet. the downside is that their oomph is delivered at low voltage. if you could get them up to a few hundred volts you could more easily deliver the amps neccesary to deliver a shot with a fast quiet charge that's got the juice to do some damage. any supercapacitor array that charges to hundreds of volts is going to be impractically large.

/supercaps... low voltage, tons of storage.

trouble is, you need a flyback generator to charge at hundreds of volts. which makes lots of noise.

sure you could make a one-shot gun that's totally silent and disposable, but given that there's chemical based versions of those out there that are far lighter and cheaper...

EM-powered weapons as personal weapons are, right now and for teh forseeable future, the stuff of fantasy and wishful dreaming. we just can't get the energy densities AND discharge times with materials that can hold up to the load to make man-portable, much less practical EM guns.

which is a right shame.
2012-09-05 12:39:33 AM
1 votes:

Publikwerks: albuquerquehalsey: toraque: Cthulhu_is_my_homeboy: cretinbob: That's not a gauss gun, that's a rail gun.

TFA says it's a multi-stage coilgun.

Also, cool as it is, it's only about as powerful as a BB gun. Actually with the right pellets, my Crosman Phantom air rifle has about twice as much muzzle energy. Sadly it's not semi-auto, though.

From the video, it's actually pretty small, about pistol sized. I don't know the engineering enough to judge whether or not you could expand that design from four stages to N, but I'm thinking a rifle length set of coils with the batteries and capacitors in a backpack might put it past the air rifle stage.

And then it would still be inferior, in every possible way, to this: 

[www.allmilitaria.com image 631x386]

I dunno, it was pretty damn quiet


If you used a heavy, subsonic projectile there might be a niche for Gauss guns as a silent weapon. The velocity wouldn't have to be all that high if you were tossing a 2 oz steel rod at somebody's skull. Maybe 400, 500 feet per second. That'd give you about the same energy as a .45 Colt but with twice the momentum. It would do Bad Things to a human, and being steel, would be more effective against light armor and obstructions.

That is, as long as charging the caps didn't make an incredibly loud high pitched noise. And you were willing to carry around a huge battery pack. To get 600J with 3% efficiency you'd be burning through about 500 mA-hr a shot from a 12V battery.
2012-09-04 08:43:14 PM
1 votes:

sendtodave: sloppyjoes7: Fortunately, he has no plans on developing it commercially, or on telling other people how to make one of their own.

What? Why is that "fortunate?"

A weapon of this magnitude shouldn't be freely available to anyone that would wish to wield it!


God forbid they wander into a bass pro and buy an equally powerful slingshot...
2012-09-04 08:20:33 PM
1 votes:

Cthulhu_is_my_homeboy: Heinrich von Eckardt: I saw 500 joules total energy and assumed that was per shot.

Yeah, if it was possible to make a 7lb Gauss rifle with the power of a .357 in your garage, I'd be building one right this minute.

The real problem with coilguns is the energy efficiency. Based on what I've read, the upper limit for efficiency for a basic coilgun with a small number of stages is somewhere in the 3-5% range. Contrast that with 30-40% for today's firearms.

To raise the efficiency to something approaching a practical weapon, you need to start adding lots of coil stages and very fast switching mechanisms with precise timing, in addition to some really big capacitors, high quality magnets, and a power source to match. All of which drastically raise the price of the weapon. I think for the hobbyist market, the best you're going to be able to do is a 20lb rig that's about as powerful as a .22LR.


honestly, the biggest drawback to the coil theory is the coils. the pulses start approaching energy levels where inductance rears its ugly head and you start crushing the barrel as the coil deforms. there are ways around this but it's still pretty ugly. carbon fiber's out as it attenuates magnetic fields something fierce(nice to put over the body of the gun tho). even non-magnetic metals will form reactive eddy currents that degrade performance.

the upper limit on coil/gauss guns is really low, sadly.

now, i toyed with plasma conversion once... that was pretty exciting. dump enough energy into 1 gram copper pellet with magnetic induction and it turns into very energetic plasma... my wife never lets me forget taking the roof off the shed with the mark 1.

if you could get the plasma to stay roughly coherent at range, it'd be pretty ugly results on impact, with almost no recoil for the shooter.

granted the gun would be huge because the powerlevels are in the megajoule range...
2012-09-04 07:27:34 PM
1 votes:

Mugato: I bet Homeland Security has a file on this guy bigger than Liam Neeson's cock.


I highly doubt that...nothing's bigger than Liam Neeson's cock.
2012-09-04 07:26:57 PM
1 votes:

loonatic112358: whosits_112: Cosmoboy: nekulor: Where I'm from, we have traditions and decorum. Those traditions dictate we have the decency to use shells in our railguns, thank you very much.

Why would you ever put a shell in your railgun? That shiat can explode. Just use slugs,man,slugs.

[www.lendio.com image 453x295]
R.I.P. Slug

not just any slug, but a high velocity slug

just be glad they're not using racing snails.


dreampunk.me
Thank God, too...
2012-09-04 06:58:27 PM
1 votes:
farking lot of work just to show off stupid tattoo
2012-09-04 06:23:44 PM
1 votes:

albuquerquehalsey: toraque: Cthulhu_is_my_homeboy: cretinbob: That's not a gauss gun, that's a rail gun.

TFA says it's a multi-stage coilgun.

Also, cool as it is, it's only about as powerful as a BB gun. Actually with the right pellets, my Crosman Phantom air rifle has about twice as much muzzle energy. Sadly it's not semi-auto, though.

From the video, it's actually pretty small, about pistol sized. I don't know the engineering enough to judge whether or not you could expand that design from four stages to N, but I'm thinking a rifle length set of coils with the batteries and capacitors in a backpack might put it past the air rifle stage.

And then it would still be inferior, in every possible way, to this: 

[www.allmilitaria.com image 631x386]


Because something made in someone's garage is the same as a mass-manufactured weapon honed to perfection by a large company.
2012-09-04 06:19:00 PM
1 votes:

toraque: Cthulhu_is_my_homeboy: cretinbob: That's not a gauss gun, that's a rail gun.

TFA says it's a multi-stage coilgun.

Also, cool as it is, it's only about as powerful as a BB gun. Actually with the right pellets, my Crosman Phantom air rifle has about twice as much muzzle energy. Sadly it's not semi-auto, though.

From the video, it's actually pretty small, about pistol sized. I don't know the engineering enough to judge whether or not you could expand that design from four stages to N, but I'm thinking a rifle length set of coils with the batteries and capacitors in a backpack might put it past the air rifle stage.


And then it would still be inferior, in every possible way, to this: 

www.allmilitaria.com
2012-09-04 06:17:04 PM
1 votes:

Arcturus72: I'd love to have one, just to see what years of navy nuke training can do with it...

Combine a electronics tech background with a bit of boredom and I'm sure I could get that firing closer to a .357's muzzle velocity in short order...


i.imgur.com

With enough time and money, you could have it firing all sorts of things.
2012-09-04 06:13:52 PM
1 votes:

way south: At any rate, its just more proof that the days of gun control lunacy are slowly coming to an end.
3d printed weapons with parts salvaged from common electronics will see to that.


You can make a modern gun in a CAVE, you farking moron.

http://en.wikipedia.org/wiki/Khyber_Pass_Copy
2012-09-04 05:51:55 PM
1 votes:
I checked in Nova Scotia and they're treating them same as a crossbow or a pellet gun. No registration required.
2012-09-04 05:48:44 PM
1 votes:

PsyLord: He probably built it in a cave with a box of scraps. If given the resources of a large company, I would like to see what he can really pull off.


Kickstarter. The Fark.com Multi-Stage Coilgun.

//not intending to use this for evil or amusement.
///nope.
2012-09-04 05:43:55 PM
1 votes:
He probably built it in a cave with a box of scraps. If given the resources of a large company, I would like to see what he can really pull off.
2012-09-04 05:36:16 PM
1 votes:

KidneyStone: and which has any barrel with a bore of
more than one-half inch in diameter


That bit there... with the "and". Ands are strong words, legally. I imagine virtually all homemade versions of such devices have a bore smaller than half an inch.
2012-09-04 05:30:21 PM
1 votes:

Oznog: Mugato: I bet Homeland Security has a file on this guy bigger than Liam Neeson's cock.

Strangely enough, I don't think this counts as a "firearm" under the law.



"any weapon which will, or which may be readily converted to, expel a projectile by
the action of an explosive or other propellant, and which has any barrel with a bore of
more than one-half inch in diameter"

I barely looked - does it have a barrel? it could be argued that the magnetic fields could be described as "other propellant."
2012-09-04 05:28:35 PM
1 votes:
I wonder what the market is like for something like this, how much this guy could charge for that thing if he sold it. And what the laws say about selling these types of devices, which don't seem like they'd fall under "firearms" in any legal sense.
2012-09-04 05:27:07 PM
1 votes:

nekulor: Where I'm from, we have traditions and decorum. Those traditions dictate we have the decency to use shells in our railguns, thank you very much.


Why would you ever put a shell in your railgun? That shiat can explode. Just use slugs,man,slugs.
2012-09-04 05:19:01 PM
1 votes:

toraque: Cthulhu_is_my_homeboy: cretinbob: That's not a gauss gun, that's a rail gun.

TFA says it's a multi-stage coilgun.

Also, cool as it is, it's only about as powerful as a BB gun. Actually with the right pellets, my Crosman Phantom air rifle has about twice as much muzzle energy. Sadly it's not semi-auto, though.

From the video, it's actually pretty small, about pistol sized. I don't know the engineering enough to judge whether or not you could expand that design from four stages to N, but I'm thinking a rifle length set of coils with the batteries and capacitors in a backpack might put it past the air rifle stage.


Hence the problem with electromagnetic guns at the modern level of technology, the power required to make them viable is huge, and we dont have the ability to make it portable in any reasonable sense. The military has made a railgun already, and the power system for it takes up a small building. Powder propelled shells are still more practical. Currently the US Navy is set to be the first to deploy one in a combat capacity, as a main gun on a ship.

This is one of the many things, along with electric cars, that will benefit from a huge jump in battery technology. Make a battery with 100x the capacity at the same size as currently available, and you will see cool stuff happen.
2012-09-04 05:17:01 PM
1 votes:
Fortunately, he has no plans on developing it commercially, or on telling other people how to make one of their own.

What? Why is that "fortunate?"
2012-09-04 05:08:16 PM
1 votes:

Cthulhu_is_my_homeboy: cretinbob: That's not a gauss gun, that's a rail gun.

TFA says it's a multi-stage coilgun.

Also, cool as it is, it's only about as powerful as a BB gun. Actually with the right pellets, my Crosman Phantom air rifle has about twice as much muzzle energy. Sadly it's not semi-auto, though.


From the video, it's actually pretty small, about pistol sized. I don't know the engineering enough to judge whether or not you could expand that design from four stages to N, but I'm thinking a rifle length set of coils with the batteries and capacitors in a backpack might put it past the air rifle stage.
2012-09-04 05:02:10 PM
1 votes:
i170.photobucket.com
... Is how its done
2012-09-04 05:00:19 PM
1 votes:

Super_pope: Meh, back when i was still in college I saw a box that had been built with an array of 50 stereo filtering capacitors like that. The rail gun they'd built would belch blue fire when you test fired the full bank, because it would flash-boil part of the aluminum slugs the thing shot.


Want. Personally, I'd like to take the fireworks exchange from last week's stupid fraternity fight article, scale it up to railguns, and commence shell exchange. For science, of course.

/Pike can't aim worth shiat.
2012-09-04 04:52:39 PM
1 votes:

scottydoesntknow: ruinevil: It can't bring the bolt/bullet through a watermelon. Not even halfway.

That was only 1 stage. With all 4 stages it went straight through the watermelon. You can see it better on the tin can. Stage 1 just pinged the side of the can and dented it. All 4 stages put the bolt straight through both sides of the can.


No, it went straight through a slice of watermelon less than half the entire melon in thickness.

Waste of 400 volts, really. Just as well, though, given the trigger discipline he displayed at the beginning.
2012-09-04 04:51:28 PM
1 votes:

Cthulhu_is_my_homeboy: cretinbob: That's not a gauss gun, that's a rail gun.

TFA says it's a multi-stage coilgun.

Also, cool as it is, it's only about as powerful as a BB gun. Actually with the right pellets, my Crosman Phantom air rifle has about twice as much muzzle energy. Sadly it's not semi-auto, though.


Of course, the first internal combustion engine weighed 7 tons and produced about 1/2 horsepower. You gotta start somewhere.
2012-09-04 04:48:20 PM
1 votes:

ruinevil: It can't bring the bolt/bullet through a watermelon. Not even halfway.


Don't just watch, observe.
2012-09-04 04:47:11 PM
1 votes:

Oznog: Mugato: I bet Homeland Security has a file on this guy bigger than Liam Neeson's cock.

Strangely enough, I don't think this counts as a "firearm" under the law.

As to whether you could get it on an airplane, it's kind of a tossup. DHS is pretty unpredictable.


They aren't supposed to let tasers, stun guns, or knives on. So its probably either a no-go or they'll confuse it with being some kind of bomb.

At any rate, its just more proof that the days of gun control lunacy are slowly coming to an end.
3d printed weapons with parts salvaged from common electronics will see to that.
2012-09-04 04:45:05 PM
1 votes:

ruinevil: It can't bring the bolt/bullet through a watermelon. Not even halfway.


That was only 1 stage. With all 4 stages it went straight through the watermelon. You can see it better on the tin can. Stage 1 just pinged the side of the can and dented it. All 4 stages put the bolt straight through both sides of the can.
2012-09-04 04:42:07 PM
1 votes:
probably should move the battery packs to a belt, or backpack to make it easier to aim.

but if he does that he should make it resemble the ghost buster proton packs

just because
2012-09-04 04:40:01 PM
1 votes:

cretinbob: That's not a gauss gun, that's a rail gun.


It is a gauss rifleLink.

I was hoping for and had it confused with a PPC.
2012-09-04 04:37:26 PM
1 votes:
media.giantbomb.com
Wants those weapons
2012-09-04 04:36:29 PM
1 votes:
Gun porn for geeks.

I'll want one when it comes with a nanosuit.
 
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