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History, Reference, Research, and GrogTalk => Organizations and Equipment => Topic started by: besilarius on March 01, 2012, 06:37:44 AM

Title: Railguns
Post by: besilarius on March 01, 2012, 06:37:44 AM
Thanks to Brant at GrogNews for this juicy tidbit.
http://news.yahoo.com/navy-railgun-tests-leading-ship-superweapon-2020-201003095.html
Title: Re: Railguns
Post by: Barthheart on March 01, 2012, 07:00:04 AM
Quote
Newly released video shows the prototype railgun using an electric-powered launcher rather than gunpowder to fire a huge hypersonic bullet in a cloud of flame and smoke.

Ummm... maybe it's just me.... but why is there a "cloud of flame and smoke" if there's no gunpowder to fire the projectile?  :o
The whole point of a rail gun is there is no fire and smoke..... :P
Title: Re: Railguns
Post by: Staggerwing on March 01, 2012, 07:25:48 AM
EDIT:

Just found the answer.

http://www.popsci.com/military-aviation-space/article/2008-02/navy-tests-32-megajoule-railgun
Quote
One big question this video begs is, what causes the giant fireball? Rail guns are supposed to be powered solely by electricity, and don't use explosives of any kind for propellant. Babb told PopSci the answer: The flames are from pieces of the projectile disintegrating; the 7-pound slug is jammed so firmly between the rails that when itís fired, pieces shear off and ignite in the air. Thereís been some speculation online that the flames come from some sort of gas thatís been used to increase conductivity. Wrong: The EMRG uses no secondary propellant ó just electricity. As a result, the breech can remain open during firing and the gun produces no blowback whatsoever. In fact, the researchers sometimes place cameras and mirrors inside the breech during tests to get a better sense of whatís going on.

That flash from the projectile hitting its target is momentary, and the paper on the target isnít burned at all afterward ó just ripped and shredded from kinetic damage.
Title: Re: Railguns
Post by: Barthheart on March 01, 2012, 07:33:19 AM
Ah... ok that sounds plausable. Thanks for the link.
Title: Re: Railguns
Post by: MIGMaster on March 01, 2012, 08:49:16 AM
I thought Jarhead got a rail on when he looked at certain guns  ;)
Title: Re: Railguns
Post by: LongBlade on March 01, 2012, 09:12:56 AM
<snicker>
Title: Re: Railguns
Post by: Centurion40 on March 09, 2012, 10:36:04 AM
EDIT:

Just found the answer.

http://www.popsci.com/military-aviation-space/article/2008-02/navy-tests-32-megajoule-railgun
Quote
One big question this video begs is, what causes the giant fireball? Rail guns are supposed to be powered solely by electricity, and don't use explosives of any kind for propellant. Babb told PopSci the answer: The flames are from pieces of the projectile disintegrating; the 7-pound slug is jammed so firmly between the rails that when itís fired, pieces shear off and ignite in the air. Thereís been some speculation online that the flames come from some sort of gas thatís been used to increase conductivity. Wrong: The EMRG uses no secondary propellant ó just electricity. As a result, the breech can remain open during firing and the gun produces no blowback whatsoever. In fact, the researchers sometimes place cameras and mirrors inside the breech during tests to get a better sense of whatís going on.

That flash from the projectile hitting its target is momentary, and the paper on the target isnít burned at all afterward ó just ripped and shredded from kinetic damage.

I wonder how much more effective the projectile/weapon would be without this flame-licking friction?
Title: Re: Railguns
Post by: MIGMaster on March 09, 2012, 11:47:07 AM
When you can slam projectiles around that fast explosives become obsolete.
Title: Re: Railguns
Post by: LongBlade on March 09, 2012, 11:50:18 AM
I wonder how much more effective the projectile/weapon would be without this flame-licking friction?

Well, there's the rub. As I reach back to what I remember of science in school, friction is inevitable. I suspect great effort has been poured into removing as much friction from a rail gun as possible. Yet it remains there in some form.
Title: Re: Railguns
Post by: Barthheart on March 09, 2012, 12:26:31 PM
Yeah... well... I always pictured rail guns as using maglev technology so there would be no friction. Maglev the projectile then use high frequency modulated magnetic forces to propel the slug out of the gun. I'm puzzled as to why there "needs" to any friction at all..... ???
Title: Re: Railguns
Post by: Centurion40 on March 09, 2012, 12:37:07 PM
Yeah... well... I always pictured rail guns as using maglev technology so there would be no friction. Maglev the projectile then use high frequency modulated magnetic forces to propel the slug out of the gun. I'm puzzled as to why there "needs" to any friction at all..... ???

'Xactly!
Title: Re: Railguns
Post by: LongBlade on March 09, 2012, 12:45:12 PM
Clearly ya'll need to be on that engineering team.
Title: Re: Railguns
Post by: Centurion40 on March 09, 2012, 01:01:56 PM
I'd need to learn how to do math first.
Title: Re: Railguns
Post by: Barthheart on March 09, 2012, 01:03:38 PM
Clearly ya'll need to be on that engineering team.

Too busy making black holes.... 8)
Title: Re: Railguns
Post by: Martok on March 09, 2012, 02:26:41 PM
Yeah... well... I always pictured rail guns as using maglev technology so there would be no friction. Maglev the projectile then use high frequency modulated magnetic forces to propel the slug out of the gun. I'm puzzled as to why there "needs" to any friction at all..... ???

I always did like the Gauss Rifle in BattleTech.  Took up a ton of space (even more than a PPC), but it was wonderfully long-range, and generated almost no heat! 



Title: Re: Railguns
Post by: besilarius on March 10, 2012, 04:52:43 PM
http://www.navweaps.com/Weapons/WNUS_Rail_Gun.htm

This article answers a number of questions about heat and ballistics concerning the Rail Gun.
It is almost four years old, though, so developments may have overtaken it.

For gaming out the effects of Rail Guns, this may give some indication of it's planned warhead.
Title: Re: Railguns
Post by: besilarius on February 10, 2015, 06:49:13 PM
Latest on rail gun development

http://www.foxnews.com/tech/2015/02/05/us-navys-new-star-wars-style-railgun-hits-mach-6/?intcmp=sem_outloud
Title: Re: Railguns
Post by: besilarius on April 11, 2015, 06:03:32 AM
Ignore the overblown terrorist hype.  Halfway down the page is a good video to see.

http://americanoverlook.com/video-terrorist-are-praying-our-military-doesnt-use-this-new-weapon-on-them-should-we-erase-them-all/42438
Title: Re: Railguns
Post by: mirth on June 13, 2015, 04:42:58 PM
Title: Re: Railguns
Post by: Staggerwing on June 13, 2015, 07:28:09 PM
"USS Wesley R. Crusher"   ;D
Title: Re: Railguns
Post by: mirth on June 15, 2015, 10:36:26 AM
Railgun Gallery and FAQ

http://imgur.com/a/dWRfh#0

http://www.reddit.com/r/WarshipPorn/comments/39wsc1/the_naval_railgun_faq_is_finished_heres_a_taste/
Title: Re: Railguns
Post by: besilarius on March 24, 2017, 05:37:43 AM
Latest report

https://news.usni.org/2017/03/23/24782-congress-navy-laser-railgun-hypervelocity-projectiles
Title: Re: Railguns
Post by: mirth on July 23, 2017, 03:32:43 PM
Title: Re: Railguns
Post by: mirth on January 31, 2018, 10:42:18 AM
http://www.thedrive.com/the-war-zone/18119/is-this-chinese-navy-ship-equipped-with-an-experimental-electromagnetic-railgun
Title: Re: Railguns
Post by: mirth on February 14, 2018, 02:00:54 PM
http://www.thedrive.com/the-war-zone/18489/despite-what-youve-heard-the-navy-isnt-ditching-its-railgun-and-budget-docs-prove-it
Title: Re: Railguns
Post by: mirth on June 22, 2018, 10:53:33 AM
http://www.thedrive.com/the-war-zone/21689/u-s-intel-says-china-to-have-railgun-armed-ships-by-2025