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DrysonBennington
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Posted - 2011.04.15 21:30:00 -
[1]
http://nerdapproved.com/misc-gadgets/1-25-kilojoules-makes-for-one-scary-diy-coilgun/
Awesome display of innovation coming from the up and coming generation's.
Keep it up kid's you are our future of defense.
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voiddragon
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Posted - 2011.04.15 21:36:00 -
[2]
I've been thinking of making something similar. I repurposed a compress air gun to load and fire metal BBs and was going to ask my professor if it was possible for me to use some of the lab equipment to make a rail gun attachment to accelerate it.
However, firearms are illegal in the UK and I'm pretty sure this would come under that law, so I never got round to it.
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Akita T
Caldari Navy Volunteer Task Force
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Posted - 2011.04.15 21:47:00 -
[3]
1250 J stored energy, estimated efficiency max 3%, so... under 40 J actual projectile energy. Still not bad for a DIY project. _
CCP LEADERSHIP MENTALITY NEEDS TO CHANGE FAST ! "New junky features sell, old polished content doesn't" ? KILL IT WITH FIRE. |
Grimpak
Gallente The Whitehound Corporation Frontline Assembly Point
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Posted - 2011.04.15 22:35:00 -
[4]
Originally by: Akita T 1250 J stored energy, estimated efficiency max 3%, so... under 40 J actual projectile energy. Still not bad for a DIY project.
is it me or all he needs to improve is the semiconductor and the coils to become something with stopping power of a .45? ---
Quote: The more I know about humans, the more I love animals.
ain't that right. |
Kristina Vanszar
Caldari
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Posted - 2011.04.15 23:10:00 -
[5]
Originally by: Grimpak
Originally by: Akita T 1250 J stored energy, estimated efficiency max 3%, so... under 40 J actual projectile energy. Still not bad for a DIY project.
is it me or all he needs to improve is the semiconductor and the coils to become something with stopping power of a .45?
True, if he's able to do it like thoose guys, that thing is more then dangerous: http://www.youtube.com/watch?v=b_OjZyQ6LGE&feature=related
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Herrring
Amarr National Quality Breaker
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Posted - 2011.04.16 02:16:00 -
[6]
This reminded me of one of my highschool classes.
We had an advanced physics class that I took because I didn't want to take biology and I could take this instead.
Anyway, when my group first designed it we couldn't get enough electricity(or we screwed up somewhere) to actually shoot anything substantial, but it was pretty fun nonetheless.
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Copine Callmeknau
Kangaroos With Frickin Lazerbeams The KWFL Republic
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Posted - 2011.04.19 00:28:00 -
[7]
That's pretty epic for something made out of old mobile phones and CRT screens. He gets bonus points for epic portal OST at the end there
...oh wait
Stunning EVE Online Theme for PS3 |
Axemaster
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Posted - 2011.04.19 00:45:00 -
[8]
Originally by: DrysonBennington http://nerdapproved.com/misc-gadgets/1-25-kilojoules-makes-for-one-scary-diy-coilgun/
Awesome display of innovation coming from the up and coming generation's.
Keep it up kid's you are our future of defense.
Hardly. It doesn't look like he spent any time learning the actual math or physics involved, which is absolutely critical to making the thing work. Instead he spent all of his time making it look pretty for the camera.
I built a 3kJ railgun and started testing it last week, but only after I had identified parameters of interest and done all the theoretical derivations. As a result, I was able to measure the plasma formation time, as well as other variables. Over the summer, I intend to construct a new version that can be more than 10 times smaller and over 200 times more efficient.
There's a difference between doing science and just ****ing around... especially when 400V capacitors are involved. Honestly, powering a coilgun with 400V caps is just idiotic, as is mounting the thing on your shoulder. That guy probably won't see age 30.
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Copine Callmeknau
Kangaroos With Frickin Lazerbeams The KWFL Republic
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Posted - 2011.04.19 00:47:00 -
[9]
Originally by: Axemaster
Originally by: DrysonBennington http://nerdapproved.com/misc-gadgets/1-25-kilojoules-makes-for-one-scary-diy-coilgun/
Awesome display of innovation coming from the up and coming generation's.
Keep it up kid's you are our future of defense.
Hardly. It doesn't look like he spent any time learning the actual math or physics involved, which is absolutely critical to making the thing work. Instead he spent all of his time making it look pretty for the camera.
I built a 3kJ railgun and started testing it last week, but only after I had identified parameters of interest and done all the theoretical derivations. As a result, I was able to measure the plasma formation time, as well as other variables. Over the summer, I intend to construct a new version that can be more than 10 times smaller and over 200 times more efficient.
There's a difference between doing science and just ****ing around... especially when 400V capacitors are involved. Honestly, powering a coilgun with 400V caps is just idiotic, as is mounting the thing on your shoulder. That guy probably won't see age 30.
Well where's your video?
Not even trolling, I just want more epic coilgun clips
...oh wait
Stunning EVE Online Theme for PS3 |
Khanya Trace
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Posted - 2011.04.19 00:58:00 -
[10]
A Coilgun isnt even practical, a Railgun is where its at. If the US military finds new material for the rails so they dont burn up after 4 shots, i am sure they have a prototype figured out to be mounted on battleships.
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Axemaster
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Posted - 2011.04.19 01:05:00 -
[11]
Ok, here's a chunk of the vid for my railgun. I just uploaded it.
Enjoy.
http://www.youtube.com/watch?v=wdAic8mq2FE
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NeoShocker
Caldari Interstellar eXodus BricK sQuAD.
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Posted - 2011.04.19 01:18:00 -
[12]
Originally by: Khanya Trace A Coilgun isnt even practical, a Railgun is where its at. If the US military finds new material for the rails so they dont burn up after 4 shots, i am sure they have a prototype figured out to be mounted on battleships.
Except we/USA don't use battleships anymore and turn them into museum/memorial ships. Can only imagine tanks as prototype with railgun armament, but tanks are still too small. ----------------------------------- Peace through power! |
Copine Callmeknau
Kangaroos With Frickin Lazerbeams The KWFL Republic
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Posted - 2011.04.19 02:21:00 -
[13]
Originally by: Axemaster Ok, here's a chunk of the vid for my railgun. I just uploaded it.
Enjoy.
http://www.youtube.com/watch?v=wdAic8mq2FE
Yeh that's pretty kewl :) What was the target, and how long before you make this portable enough that I can buy one?
...oh wait
Stunning EVE Online Theme for PS3 |
Diablo Ex
Caldari Reasonable People
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Posted - 2011.04.19 02:36:00 -
[14]
Maybe it's just my ignorance of coilguns, but if the physics are in any way similar to chemical projectiles, he is using a really massive projectile in that video. Since bore size is limited only by the diameter of the coils, wouldn't smaller mass produce higher velocity and thus more effective damage? Say something like a sewing needle or hand dart tip? ---
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mkint
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Posted - 2011.04.19 02:55:00 -
[15]
Originally by: Diablo Ex Maybe it's just my ignorance of coilguns, but if the physics are in any way similar to chemical projectiles, he is using a really massive projectile in that video. Since bore size is limited only by the diameter of the coils, wouldn't smaller mass produce higher velocity and thus more effective damage? Say something like a sewing needle or hand dart tip?
To this day I have no idea how I graduated highschool physics since all I really remember about it is playing board games and taking naps. Nevertheless, looking at the damage done there I'd say their gun put out about the same amount of damage as a high powered paintball gun or pellet gun. I don't know if having a tighter coil would improve the power, but using a smaller diameter (same weight) projectile would mean higher penetration but same energy (minus drag), and a lighter projectile would mean higher speed but less damage. I'd say any notable improvements for the ability to actually cause damage would be in the efficiency. No idea how you'd go about doing that though. :P Maybe submerge the coils in liquid nitrogen?
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Copine Callmeknau
Kangaroos With Frickin Lazerbeams The KWFL Republic
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Posted - 2011.04.19 03:07:00 -
[16]
Edited by: Copine Callmeknau on 19/04/2011 03:09:37
Originally by: Diablo Ex Maybe it's just my ignorance of coilguns, but if the physics are in any way similar to chemical projectiles, he is using a really massive projectile in that video. Since bore size is limited only by the diameter of the coils, wouldn't smaller mass produce higher velocity and thus more effective damage? Say something like a sewing needle or hand dart tip?
yehhh, you'd get more velocity but not necessarily more impact force. I mean I don't think that guy has actually run his maths, but you want something that has at least some mass so you get enough momentum to a) avoid buffeting/tumbling from air resistance b) put a decent hole in the target before being deflected
I think unless you're talking speeds in the mach+ area, you want something of a decent mass. Probably not as big as what he was shooting, which almost looked like a elongated .45 round, but probably bigger than a needle. I think a elongated .22 round would probs be the way to go with that guys design
And yeh, he needs to obtain better efficiencies really, a tighter wound coil of a greater length would probs be the cheapest way to do it. Maybe an electronically timed 2-stage coil also
...oh wait
Stunning EVE Online Theme for PS3 |
Axemaster
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Posted - 2011.04.19 06:17:00 -
[17]
Edited by: Axemaster on 19/04/2011 06:20:17
Originally by: Copine Callmeknau
Yeh that's pretty kewl :) What was the target, and how long before you make this portable enough that I can buy one?
The target was a wire mesh ballistic pendulum which was set up rather badly. That'll be fixed for the next shot later this week. And I don't think practical railguns will ever be man-portable, at least not without massive advances in both batteries and capacitors. They should work fine as vehicle mounted weapons though.
Originally by: Diablo Ex Maybe it's just my ignorance of coilguns, but if the physics are in any way similar to chemical projectiles, he is using a really massive projectile in that video. Since bore size is limited only by the diameter of the coils, wouldn't smaller mass produce higher velocity and thus more effective damage? Say something like a sewing needle or hand dart tip?
Yeah, it does look like a very oversized projectile. It's probably made of iron or steel, since it has to be ferromagnetic. The real trouble with a coilgun is that the concept itself forces you to choose between diametrically opposed design elements. If you want to use electrolytic capacitors without exploding them, you have to have an overdamped circuit. And that prevents you from using superconducting coils. On the other hand, an overdamped circuit wastes tons of power. Moreover, the projectile is always accelerating through a non-maximized magnetic field, which is very inefficient.
A railgun on the other hand has the projectile continually accelerated through a maximized magnetic field. Superconductors can be used since the inductance in the circuit is extremely tiny. Even without superconductors, my railgun passes in excess of 10000 Amps at peak discharge. Moreover, my design allows for extremely small amounts of rail ablation - I should be able to fire mine at least 30-50 times, where most railguns fail in less than 10.
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Copine Callmeknau
Kangaroos With Frickin Lazerbeams The KWFL Republic
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Posted - 2011.04.19 07:17:00 -
[18]
Originally by: Axemaster Edited by: Axemaster on 19/04/2011 06:20:17
Originally by: Copine Callmeknau
Yeh that's pretty kewl :) What was the target, and how long before you make this portable enough that I can buy one?
The target was a wire mesh ballistic pendulum which was set up rather badly. That'll be fixed for the next shot later this week. And I don't think practical railguns will ever be man-portable, at least not without massive advances in both batteries and capacitors. They should work fine as vehicle mounted weapons though.
No plans for a coilgun then? :o
...oh wait
Stunning EVE Online Theme for PS3 |
Alotta Baggage
Amarr Imperial Manufactorum Armada Assail
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Posted - 2011.04.19 07:22:00 -
[19]
Originally by: Copine Callmeknau
Originally by: Axemaster Edited by: Axemaster on 19/04/2011 06:20:17
Originally by: Copine Callmeknau
Yeh that's pretty kewl :) What was the target, and how long before you make this portable enough that I can buy one?
The target was a wire mesh ballistic pendulum which was set up rather badly. That'll be fixed for the next shot later this week. And I don't think practical railguns will ever be man-portable, at least not without massive advances in both batteries and capacitors. They should work fine as vehicle mounted weapons though.
No plans for a coilgun then? :o
Railguns are so much cooler, the ones mounted on destroyers hurl the dohickey like 60 miles away (used actual science lingo for you nerds )
Originally by: Valkoinen Heteromies
I for one would love to be able to walk on stations and fly spaceships in the body of a little cute catgirl!
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Axemaster
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Posted - 2011.04.19 16:58:00 -
[20]
Nah, no plans for a coilgun. I have my hands full as it is...
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Grimpak
Gallente The Whitehound Corporation Frontline Assembly Point
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Posted - 2011.04.19 17:16:00 -
[21]
Edited by: Grimpak on 19/04/2011 17:16:41 tbh, in my limited knowlege, coilguns seem to be more feasible for portability, while railguns are battleship barrels.
tbh, if we ever see railguns going "live", resurgence of battleships is just a step further. ---
Quote: The more I know about humans, the more I love animals.
ain't that right. |
Nova Fox
Gallente Novafox Shipyards
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Posted - 2011.04.19 17:41:00 -
[22]
Edited by: Nova Fox on 19/04/2011 17:47:00 Edited by: Nova Fox on 19/04/2011 17:43:37 The current US navy railgun is only testing at half of goal power.
Current projections puts her at a range of 150 miles. Original estimation was 50 miles before they started to shoot her.
Anyways that earlier linked video is old the new apperatus is far far far smaller they're designing it closer to being sea worthy. Of course this is just the cannon the capacitor bank is still the size of a classic 1940s computer but that can be stowed below decks.
Newest Vid New Aerodynamic Sabot Rounds Used in US Navy Railgun.
And the scariest part it still traveled 7kms after hitting the plate with no gun elevation. And from the looks of it they fixed the shells from igniting from traveling so fast though the atmosphere. And to think they want these shells to travel mach 15 :(, its doing +mach5 right now. But at current speeds the railgun round went like 'what steel plate?' Pre-order your Sisters of ≡v≡ Exploration ship today, Updated 3APR11
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mkint
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Posted - 2011.04.19 17:53:00 -
[23]
Originally by: Nova Fox Edited by: Nova Fox on 19/04/2011 17:47:14
The current US navy railgun is only testing at half of goal power.
Current projections puts her at a range of 150 miles. Original estimation was 50 miles before they started to shoot her.
that's 240km. That's well into sniper range for EVE. But I suppose weapons in space-molasses have more friction to deal with than a little harmless air.
Quote:
And the scariest part it still traveled 7kms after hitting the plate with no gun elevation. And from the looks of it they fixed the shells from igniting from traveling so fast though the atmosphere. And to think they want these shells to travel mach 15 :(, its doing +mach5 right now. But at current speeds the railgun round went like 'what steel plate?'
For the record, the steel plate was 100 yards away, and the round kept going another 7km after punching through... sounds like a big "whoops" for the guy doing the math.
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Zaerlorth Maelkor
The Maverick Navy Against ALL Authorities
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Posted - 2011.04.19 18:18:00 -
[24]
Wow that military grade railgun is frightening. Aliens better invade us soon or we're going to have weapons tech to fight them off! However, you might want to consider a few things, first of all; I now have one of those annoying sigs. second; you should probably move on to some more interesting things than reading this sig.
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Copine Callmeknau
Kangaroos With Frickin Lazerbeams The KWFL Republic
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Posted - 2011.04.19 19:21:00 -
[25]
Edited by: Copine Callmeknau on 19/04/2011 19:22:07
Originally by: Zaerlorth Maelkor Wow that military grade railgun is frightening. Aliens better invade us soon or we're going to have weapons tech to fight them off!
You know the aliens are just gonna come with 1400mm arty's and alpha the whole planet away though
---
Yeh railguns are pretty cool, but I'd much rather have a coilgun in my hand than a railgun on a ship (I can't swim real good) :p
...oh wait
Stunning EVE Online Theme for PS3 |
Mr Kidd
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Posted - 2011.04.19 19:37:00 -
[26]
Originally by: Axemaster
There's a difference between doing science and just ****ing around... especially when 400V capacitors are involved. Honestly, powering a coilgun with 400V caps is just idiotic, as is mounting the thing on your shoulder. That guy probably won't see age 30.
You mean the plastic butt and handgrip of the gun is going to conduct electricity? Inquiring minds want to know.
True, true, the capacitors are a danger when charged. But then so is a light bulb. Taken on face value....which is about as much consideration you've given the setup, I'd say it looks like the guy knows what he's doing. Perhaps, he's just not interested in the science as much as he just wants to F*** things up and has the knowledge to do it.
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Lokaas
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Posted - 2011.04.20 00:43:00 -
[27]
I now have faith in the average U.S. citizen to defend themselves against government encroachment if the leftists succeed in taking our gun rights away. Go DIY weaponry!
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Mr Kidd
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Posted - 2011.04.20 01:42:00 -
[28]
Originally by: Lokaas I now have faith in the average U.S. citizen to defend themselves against government encroachment if the leftists succeed in taking our gun rights away. Go go DIY weaponry!
Fixed.
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Copine Callmeknau
Kangaroos With Frickin Lazerbeams The KWFL Republic
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Posted - 2011.04.20 01:44:00 -
[29]
Edited by: Copine Callmeknau on 20/04/2011 01:45:50
Originally by: Lokaas I now have faith in the average U.S. citizen to defend themselves against government encroachment if the leftists succeed in taking our gun rights away. Go DIY weaponry!
Well, if you're that worried just build yourself a flamethrower. Much easier, much cheaper, and much much more devestating.
Not that you actually have a 'left' in America as far as the rest of the world is concerned. You have an extreme right, and a not-quite-as-extreme right Damn those not-quite-as-extreme-rightists! Takiung away all your stuff and stuff
...oh wait
Stunning EVE Online Theme for PS3 |
EnslaverOfMinmatar
Amarr Viziam
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Posted - 2011.04.20 02:55:00 -
[30]
Originally by: Copine Callmeknau Edited by: Copine Callmeknau on 20/04/2011 01:45:50
Originally by: Lokaas I now have faith in the average U.S. citizen to defend themselves against government encroachment if the leftists succeed in taking our gun rights away. Go DIY weaponry!
Well, if you're that worried just build yourself a flamethrower. Much easier, much cheaper, and much much more devestating.
Not that you actually have a 'right' in America as far as the rest of the commies is concerned. You have normal people and commies Damn those commies! Takiung away all your stuff and stuff
Fixed uʍop ǝpısdn ǝɹnʇɐuƃıs ʎɯ ƃuıpɐǝɹ ǝɹɐ noʎ Signature removed. Please submit a petition for further details. Navigator
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