8 KJ Hand-RailGun

[fcdcristy92]

What's the kinetic energy of the projectile?I'm sure it's not 8kj, 'cause if so, this would be a hell of a weapon ...

[666scelus666]

do you know how much 8kJ are?! i just tell you that a 9mm pistol shoots at 0,5KJ...

[Terren69]

Hope that house is a rental!

[CuttlefishPi]

Are you using AC power?

[MrStemkilla]

@CuttlefishPi that would not work capacitors only run on dc

[thesinner85]

@MrStemkilla I think he's referring to plugging into the wall for the power supply.

[tools99]

looks like an apple advert lol nice gun kudos

[janicewatersteen]

I was under the impression that the electrical discharge from a railgun momentarily interfered with electronics thus making filming and testing rather difficult. Is this only a problem with extemely high charge railguns?

[tuningshark]

Hahaha that computer case!:P Real cool though!

[epocolypze]

do you have schematics? i want to make one now!

[SkyGuyXD]

HOLY SHIT. 

[ANTALIFE]

@VinnieDain424 No, I puddi

[7digitalSunday]

nice, Do you know what kind of velocity you get out of your projectile?

[sakoshooter48]

Stupid people are so avant garde!

[gotme753]

no is it effective vs zombies is the real test

[hellkid94]

how do u calculate the kJ it produces?, thx for any help

[cyborgtroy]

@hellkid94 - By asking on the comment threads of every relevant video on YouTube, which is widely known to be one of the least knowledgeable sites on the Internet.

[phikre]

@hellkid94 W(el)=0.5*c*u²

W(kin)=0,5*m*v²

You have to measure the velocity v and the voltage u at the capacitors. And you have to know the capacity c of your capacitors. You also have to measure the weight m of your projectile.

[megasmart1337]

Thats chuck norris breathing

[Digadogup]

@megasmart1337 lol chuck Norris doesn't breath

[jstafuckinusername]

Beautiful setup. I've made some handheld coil guns, but this is is just a beautiful application of science.

[Kenjirus]

@pyson89 with railguns kilojoules is used to indicate the ELECTRIC power it uses to sling the projectile not the energy of the projectile

[vladnuke]

@Kenjirus Well then the question is how efficiently it uses that power. Tighten the limits, perhaps even mod the projectiles sol they are at their maximum efficiency, simply make it good, and it should be a formidable opponent in a fight, espcially if it was more portable and had a magazine.

[IntoxicatedHumans]

@vladnuke Ill try not to sound as an arse, and it's not meant that way if it does. :P the XXJ/KJ is the energy stored in the caps, given by a formula dependant on the volts stored and how many (µ)farads the cap can hold. The energy stored there is the energy you mention when you say how many joules, and although it doesn't portray the efficiency of the gun (which is awfully poor), it's still the correct way of mentioning the energy of the gun. It's all in the sentence: GUN, not bullet :P

[xWOMBOCOMBOx]

@vladnuke Simply make it good?

Hardly an easy task. Railguns can only convert about 5 or 10 percent of their electrical energy into kinetic energy. coilguns are even less, which are particularly less than 5 percent.

[Driv3th3hiv3]

@Kenjirus Wrong,

Stored energy, you are talking kinetic energy

[vladnuke]

@pyson89 Lol thats 8000 kilojoules, and it doesn't use any of that messy gunpowder. Kilo, as in 8 x 1000

[ATOMICWATERSTUDIOS]

can you plese make a tut or show me the scamitics on how to make plzplzplz!!!

[soldier14E]

@ATOMICWATERSTUDIOS you cant even spell simple words, i dont think you should be playing with dangerous weapons...go read a book or something

[omgI15m]

Whats the efficiency of this design? have you tested it?

I've heard that rail guns have a ridiculously low efficiency, like around .1-1%.

[balufire]

Indeed this is a Railgun... Nice Work...

[artikbotum]

holy crap dude that's spectacular!

[yerbol1982]

интересно, а 8 кДж это эффективная энергия снаряда или энергия всей системы, что то не верится что у этй пушки убойная сила больше чем у АК-47,

если 8 кДж это энергия снаряда , то попробуй прострелить стальной лист толщиной 5 мм.

[westyman1904]

a rail gun probably isnt the greatest thing to be holding in you hands XD... nice one though, i couldnt get mine to work

[wookie0]

Do you have a pdf for this design?

[heix0]

i love fireworks

[BArtinekPL]

Bye PC ! *salute* xD

[blahdob]

It's the gauss rifle off crysis

[IchigoCrash]

BEASTLY!!!

[PAWNED71]

Did Ukraine develope this?

[MegaFragger]

I WANT ONE!!!!

[FriutloopTom]

Get a nice compact power pack, iron sights and the armrd forces might be interested in a gun that can rip right through a target without using controled explosions

[MetalGear180]

God dam thats beast

[lazyflame2]

all i have to say is thats awsome

[maticoff]

is the sound you hitting the target or is it the rail gun?

[riverwater252]

how the heck does a railgun work and why would you make one?

[CyValkarion]

@riverwater252 go to howstuffworks and look it up

[fuelfreak108]

@riverwater252 - Basically, the projectile is accelerated by magnets which (as I understand it) change polarity as the projectile passes. This mean each magnet "pulls" the projectile to itself, then switches polarity and pushes the projectile away from it (down the barrel) once the projectile is past it.

[skyseeker901]

@fuelfreak108

Not quite, that is how a coil gun works. A coil gun and a rail gun both work using magnetic principles, but the railgun is a bit more complicated. Current is run up one rail and down the other, making a broken circuit. The circuit is completed with the addition of a conductive, magnetic projectile placed between the rails. With current now flowing through two rails, the rails produce counter-rotating magnetic fields, which accelerate the projectile forward out of the gun.

[AurumenK]

Is that a shotgun railgun? Very cool.

[birramorettisuper]

after yet another screen of death ...... I understand

[PatronSaint210]

Whats the point

[roddycluff]

Coild guns don't make noise, (not much anyway)

RAIL guns, DO... There's a lot of amperage flowing through the projectile, so you'll hear the huge POP of the sparks and electricity arcing.

[Moeclone]

In the description, is it the odessa I think it is?

[aquadano1]

depending on the speed of the projectile, its loud if it breaks the sound barrier. THAT could be the pop that is heard.

[Beefyrulz]

scary

[2638676]

Dude what kind of gun is thattt ??????

[TIM1TULIAG]

выглядит очень впечатляюще !!!!!!!!!!!

[ridingonextremesedge]

Hum, nice but not a rail gun, its a coil gun. Obvious by the leads coming from the front of the barrel. The flame is probably due to the arcing of the electricity to the projectile which is causing it to ignite or if the DIY'r didn't insulate the barrel to protect from arcing, then the arc is following the projectile out of the barrel.

[eyeball334]

lol, not insulating is what makes it badass.

[ridingonextremesedge]

to be sure.... Much agreed. It would probably look pretty kick ass shooting up at the sky in the middle of the night.

[xWOMBOCOMBOx]

since when do coil guns have CO2 injectors?

[ridingonextremesedge]

They don't need them... Its a DYI design and it depends YOUR design. They are about a million ways to design but the main differentiation is two fold. A Rail gun is called a rail gun because of the electrically charge rails that run along the length of the flight patch of the projectile.

[xWOMBOCOMBOx]

are u stupid? read the description. it HAS them.

[Pyroteknitian]

I agree... What i dont understand is why electromagnetic fields pulling a bullet through the tube makes noise....

[jrro0t]

the dude put co2 into it aka carbon dioxide i think. that should create the sound

[Pyroteknitian]

Dude... I know, I was simply pointing out that there should be no CO2 in a railgun

:)

[Mycologist]

@Pyroteknitian

The CO2 is used to inject the slug into the live rails, giving the slug some initial velocity and so reducing the chance of rail-damage, and removing the need for a super expensive scr switch or similar.

[Blodslav]

@Pyroteknitian Ok, so what do you propose as an efficient method for injecting the projectile?

[Pyroteknitian]

@Blodslav I didnt know that there was an injector. This is because some diagrams fail to produce visible evidence of there being one, however simple the schematic was meant to be. So, here's my conclusion: Railguns make noise, Coil guns do not. If im wrong, reply and tell me where i went wrong.

[Blodslav]

@Pyroteknitian Actually, both make noise. When the energy stored in a capacitor bank is released, it makes noise wether it's arcing through a projectile, or through a coil. Although railguns make more noise, and there's more arcing involved. Railguns and coilguns are both energy weapons that work on 2 very different principles. A railgun works by creating a massive lorentz force between the two rails while passing current through a projectile.

[koffeekage]

its the air being forced out of the barrel, like snapping you fingers or clapping your hands....or farting.

[MeierTV]

@Pyroteknitian there is sparks generated inside the railgun, that is why you hear noise

[zekedge]

@ridingonextremesedge You're always going to have the plasma trail, and arcing would be impossible, because the arc would happen with the projectile to both the walls.

[ridingonextremesedge]

Agreed on your point. I'm only assuming its an arc cause its so close to the barrel and depending on the camera, and Arc would look like a large flash without a proper filter...

Your rationale seems to make more sense than an ARC.

[dinitroacetylen]

So you pretend its muzzle energy is 8 kJ and yet your hand doesn't shake with recoil? Pleeeeeeease... 8 kJ would have probably sprained your wrist right away.

[TheFurryInformer]

Think about the projectile weight.

[MonkeyOfGG]

:23 - and that's all that chassis is useful for ;)

[ConnorXV]

Well there would be recoil because every action has an equal and opposite blah blah. The forces between the rails are magnetic which won't relieve the recoil given by accelerating the projectile.

[xtamared]

If my electrodynamics is correct, there should be no recoil at all, because the force on the rails is directed outward at a right angle to the force vector instead of backward. Although I don't know why the wires are jumping like that....

[TheUFOeffect]

yeah, think of it as the projectile going outwards is the recoil(resulting vector)

[7410n0]

Where is flash coming from?

[xkwiptwendl]

@7410n0

The projectile, when it is launched out, in many cases it gets vaporized or at least partially vaporized, and the excess energy is... converted? Into plasma. The larger the plasma burst, the more inefficient the railgun is.

[akademiker23]

from the iron in the cable, you see them unplugging in the vid and the iron iinside the is burning.

[seraph8672]

@7410n0 Two things contribute to the flash, The Colapse of the magnetic field as the conductor (the projectile) is expelled out the end of the unit. The second is the arc of current connecting the projectile and the rails until it flies so far that the airs resistance is too great for arc to pass through.

[hellmaniac666]

супер!

[dragonamt]

8kj? how big is the unit your 'handgun' is hooked up to? Regardless it is still quite impressive.

[shadowOrgon]

so was there alot of recoil lol??? good job btw

[ANTALIFE]

So many people on here that don't know what they are talking about.

[Blodslav]

@ANTALIFE it is kinda sad isn't it?

[Hleided]

Terikan2, then why did you post a comment?

[ChickenHawk110]

Wow, just shoot the shit out of your walls and framework.

Nice work on the railgun. Good to see you dont give a shit about your house.

[iputacapinurass]

hes shooting at a box...

[SpartanJose777]

The sparks are cool enough to deserve their own weapon.

[acklay101]

2 questions: 1) How did you contain the tesla and bipolar discharge? Obviously it did not affect the camera.

2) May I recommend using a more powerful source, such as a car battery or a personal generator? i noticed the wires flying away as it fired.

Hope I can be helpful!

[infamous741]

is it really a good idea to be shooting stufflike that in the house?

[Anothercoilgun]

Yes. Its a great idea. Would you have him shoot people on campus?

[mangame5]

what would happen if u would shoot a BIG GUY in the nuts with tht thinggie,will he still have kids,will he die? XD

[iJohnTV]

we all know what a rail guns is, we all know what coil guns are too and we know the difference.... but railgun just sounds so much cooler than coilgun. badass design, i've never seen one with such a small barell.

[GooGobbler113]

I personally dont give a rats ass if it is by definition a rail gun or coil gun. Its got some kick, thats all I really give a shit about. Btw your projectiles seem to be fragmenting pretty hard, you might wanna try a longer barrel.

[Ellajuud]

whatever, faggot

[iwhitt567]

This is NOT, I repeat, NOT NOT NOT a fucking railgun.

[masermaker97]

it IS I repeat, IS IS IS a rail gun

[iwhitt567]

A railgun is, specifically, a gun by which a power source (most often a capacitor controlled by a relay) is sent to two parallel conducting rails. When an armature or projectile that is also a conductor bridges the gap of the two parallel rails, because current flows on one axis across the armature and a magnetic field b is formed in conjuncture by the current in the two rails, a physical force propels the armature forward. Crack that open and show me. Until then, it's not a railgun.

[anon32016]

Sure it's a railgun. You don't get that kind of sparks spraying out with a coilgun.

Really, it IS a railgun. Why shouldn't it be? He's got more videos of power supply, charging circuit, capacitors etc. It doesen't take a rocket scientist, you know. It's either a coilgun or a railgun. There's really not an awful lot more options, and seeing the sparks... bingo.

[angelwingzx]

obviously it is a fking rail gun. the rails are contained in the barrel and you and see the two power source leads on the fking sides. prior to that is a CO2 injection system. IT'S A FKING RAIL GUN LOL

[xsolarwindx]

A bit of physics for you all -

Kinetic Energy = 1/2 * mass * velocity^2

Momentum = mass * velocity

>> Hm maybe he calculated the energy spent, not the real efficiency

Most likely.

>> also, if he's firing a bigger round, that will have an effect too, wouldn't it?

I mean, if I dropped a bus from a helicopter, that would be a very energetic impact, and the projectile (Bus) would be moving relatively slow.

You can't confuse energy and momentum.

[JoePage2008x2]

8kj is what the capacitor bank holds, the energy which is used to accelerate the projectile, the muzzle energy will not be this, its about 140J in another video of his. Some railguns can manage 50% efficiency or even more, those are usualy the militery ones. A good hobbyist might manage 15%. The voltage makes a huge difference on efficiency.

[Anothercoilgun]

A good hobbyist might manage 1.(point)5%. The voltage makes a huge difference on efficiency.

[JoePage2008x2]

I forgot to press the point in my comment. I ment to say that some have acheived 5.(point)0% efficiency. and a good hobbyist can manage 1.(point)5%. I wish i could buy some huge capacitors to make a railgun, im only 16 so my parents wont let me, my goal is to one day make a 100kj one.

[MrSuperiorBeing]

Home made Electrolytic Capacitor.

You just need a 3 pieces of plexi-glass, a roll of aluminum foil and RTV ( automotive sealant)

cut the plexi-glass 2" wider than the roll of foil,

Foil on both sides of the glass , make sure the foil is 1" from the edges

solder 10 gauge wire to both foils

cover both sides with another sheet of plexi-glass

Plexi / foil / plexi/ foil /plexi

Glue the edges of the 3 pieces of plexi-glass together with RTV in the 1" gap around the foil.

Keep it under 1KV

[FrinkBatallion]

100kJ :D a bit expensive ... right?

[JoePage2008x2]

You sometimes find old discarded capacitors from pylons that still work, no way i would spend money on a new 100kj capacitor bank. My dad wont let me have a huge capacitor because he knows it could kill me, im only 16.

Homemade capacitors are too dangerous for this type of thing, imagine the insulation breaking with anything above 500j, too scary. plus they leak really bad.

[Freewarplayer]

You are crazy. 100kj... You'll need a high capacity with high voltage. That's horrible expensive!

But I like the plan ;)

[JoePage2008x2]

unless i become rich i dont intend on buying one new, plus this may be a long time in the future.

[JSmithv099]

automatic switch-off ? :)

[sonofhendrix]

set phasers to stun!

[kungfuasgaeilge]

AW NICE! the video froze and started loading just as there was a massive muzzle flash! perfect

[evgenij3]

8kj? it sounds unreal. m855 bullet in a velocity of 950 m/s has apr. 1.8 kj

[Viking009]

Hm maybe he calculated the energy spent, not the real efficiency

[AvroLancaster]

also, if he's firing a bigger round, that will have an effect too, wouldn't it?

I mean, if I dropped a bus from a helicopter, that would be a very energetic impact, and the projectile (Bus) would be moving relatively slow.

I don't have the numbers, or the mass of his projectile, but I think that a slower moving (maybe even non-lethal speed) railroad spike might have a lot of energy compared to a small bullet, right?

[Viking009]

yet the effect is very nice :-P It's a pity it is not independent from external source

[AnselmoFanZero]

evgenij3: The cap bank has 8kJ

Even if a railgun is more efficient than a coilgun...you have to clean / replace the rails after you fired a few shots.

So wtf...induction coilguns are way more interesting.

[ztrainx]

nice, but it looks like the cord comes unpluged when you shoot.

[gonepishing]

8kg 0_0

in you hands????

even im not crazy enough for that!

can you show us your cap bank sometime?

[Viking009]

It says 8 Kj, thats KiloJoules, or the muzzle energy of the projectile

[daireactionhero]

do you no how to get capasitors to charge quikly

[daireactionhero]

what did you use for ammo

[unnamedgrave]

aluminum shards

[skullorlo]

is this gun portable? so you could go outside and have fun:P or go hunting deer

[dima1902]

Not yet. :) But, now I working for this...

[SkinnerRichard]

Wow... That's a killer.....

[ABCmeltdown]

how heavy is your ammo?

[dima1902]

Approx. 15 kg.

[GlenKuhne]

15kg?

I'm amazed you can hold it in your hands :D

15g perhaps?

[kurdishmob]

ur puttin 8KJ ?!?!? come on it looks like 2 to 4 KJ to me......maybe u should work on ur timing and rails a little more

[mactep4eef70]

how many railguns you built in ur wasty life? this is 8KJ in capacitors, but not kick. fool

[kurdishmob]

thats what im sayin idiot... u got the power but some other factor is limiting ur rail gun...

[doglick4612]

That may be 8 KJ of electricity going into it but it sure isn't putting anything near 8 KJ out when it shoots.

[maximumleo]

That many amps through a handheld device would make me very nervous! Very cool though.

[ilovemickeyt]

SWEEEEEEEEEET