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    Railguns closer to reality and service aboard US Navy ships

    $#@! just got serious:


    The first weapon-scale prototype of a futuristic Navy railgun began undergoing firing tests last week, the next big step toward putting the electromagnetic superweapon on U.S. warships by 2020. The Navy envisions using railguns to destroy enemy ships, defend against enemy missiles, or bombard land targets in support of Marines hitting the beaches.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. The Office of Naval Research hopes its new test phase — scheduled to last until 2017 — leads to a Navy weapon capable of hurling 40-pound projectiles at speeds of 4,500 mph to 5,600 mph over 50 to 100 miles (7,240 to 9,010 kilometers per hour over 80 to 161 kilometers).

    The full-size prototype, made by BAE Systems, "looks like a real gun," said Roger Ellis, program manager for the railgun at the Office of Naval Research, during a media teleconference today (Feb. 28). Previous tests involved clunky laboratory prototypes that would never see action aboard a Navy warship.

    U.S. Navy commanders ultimately want a weapon capable of firing up to 10 guided projectiles per minute at targets up to 100 miles away. Navy warships currently have 5-inch guns capable of firing at distances of 13 miles.
    "There is potential to replace the 5-inch gun, but it would do far more," Ellis said in response to an InnovationNewsDaily question. The railgun could hit the same distant targets that Navy missiles strike today, he said.
    A second railgun prototype, built by General Atomics, is set to arrive for testing in April, Ellis said. Having railguns built by different companies gives the Navy a choice if it ultimately decides to deploy the superweapon.
    Both General Atomics and BAE Systems committed millions of their own dollars during the first $240 million test phase, which recently ended. The newly begun Phase II is funded at about the same amount. It is testing prototypes capable of harnessing 32 megajoules of energy. Just one megajoule would be enough to throw a 1-ton car 100 mph.

    During the five years of Phase II, the Navy plans to test cooling systems and a battery that could store the energy required by the railgun. It has contracted with General Atomics, BAE Systems and Raytheon for designs for a pulsed power system.

    Because of its hypersonic speed produced by the railgun, a projectile shaped like a bullet could deliver devastating damage even without exploding. It could include electronic guidance systems such as GPS that would be protected against the immense heat of the giant bullet's hypersonic passage.

    "The rounds we are firing currently are non-aerodynamic slugs," Ellis said of the testing. "They match the interior ballistics of what the launcher is expected to see but are intended to slow down quickly."

    If all goes well, the Navy could end up equipping its ships with railguns of all different sizes. Companies such as General Atomics have already built smaller railguns for their own testing purposes.

    "We believe this is game-changing technology, and in our case we've invested internal funds of more than $20 million for a subscale prototype to move the technology forward," said Tom Hurn, director of railgun programs at San Diego-based General Atomics.




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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    hurling 40-pound projectiles at speeds of 4,500 mph to 5,600 mph over 50 to 100 miles (7,240 to 9,010 kilometers per hour over 80 to 161 kilometers).
    F=MA....40lbs *4500-5600mph=180,000-224,000 Newton lbs of Force...over 50-100miles. T_T

    I'm scared.

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    DP did you just really equate its top speed to its acceleration? acceleration is velocity over time.
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    This thread has too much math for my liking. I want my railgun already. Dominated in quake II with it. None of you would be able to beat me, that is a promise.

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    very cool it looks like somthing out of star wars

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    Click here to enlarge Originally Posted by oddjob2021 Click here to enlarge
    DP did you just really equate its top speed to its acceleration? acceleration is velocity over time.
    Yes, yes I did!
    Click here to enlarge

    at some point, it'll have that force, right?
    Click here to enlarge

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    Click here to enlarge Originally Posted by DarkPhantom Click here to enlarge
    F=MA....40lbs *4500-5600mph=180,000-224,000 Newton lbs of Force...over 50-100miles. T_T

    I'm scared.
    V2xV2 - V1xV1 = 2A(delta)X

    6263896 - 4044567 = 2A x 81000 ==> A=13.7 m/s

    F=13.7 x 9 ==> F= 123.3N

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    Hiroglyphics

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Hiroglyphics
    You are lucky. I wanted to solve in three different ways so he could understand his mistake lol

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    holy tits
    JB4LIFE

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    Click here to enlarge Originally Posted by mazdaspeed6 Click here to enlarge
    holy tits
    Why does the idea of a busty nun pop in my head?

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Why does the idea of a busty nun pop in my head?
    because your a sick man? lol
    JB4LIFE

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    Click here to enlarge Originally Posted by mazdaspeed6 Click here to enlarge
    because your a sick man? lol
    I am going to make a certain woman very lucky one day.

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    Propaganda to scare Iran

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    Not meant to thread jack, but Raytheon's been working on an Exoskeleton for the Army as well (since 2010)... Sci-fi is becoming reality... Click here to enlarge

    http://www.csmonitor.com/Science/201...n-Man-2-tie-in
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    8,000 feet per second with a 40lb projectile? I see potential for mobile, VERY long range rifles. And the potential to pierce various materials with various bullet types.

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    heh maybe in 2030. look at the size of that thing. imagine the power consumption for a portable unit, they say these monsters are working with 32 MJ of energy. how many shots would you have on a tiny version 'out in the field'... think of the battery, we would need something better than Li. conventional bullets/gunpowder will reign supreme for now but you are right that this is the future, if we choose to pursue it.
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    Only if we make it past 2012
    Some people live long, meaningful lives.

    Other people eat shit and die.

    I'm not racist, I hate everybody equally; especially fat people.


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    Funny, the noise the thing makes when it's being fired actually sounds like a rail gun from a few pc games I've played over the years.

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    Click here to enlarge Originally Posted by Sorena Click here to enlarge
    V2xV2 - V1xV1 = 2A(delta)X

    6263896 - 4044567 = 2A x 81000 ==> A=13.7 m/s

    F=13.7 x 9 ==> F= 123.3N
    (non-physics major) but would like to understand, V1/V2 = velocities?

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    Click here to enlarge Originally Posted by DarkPhantom Click here to enlarge
    (non-physics major) but would like to understand, V1/V2 = velocities?
    Yes.
    V= Velocity in meter/second
    A= Acceleration
    (delta)X= Distance in meter

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    1 out of 1 members liked this post. Yes Reputation No
    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    This thread has too much math for my liking. I want my railgun already. Dominated in quake II with it. None of you would be able to beat me, that is a promise.
    I'd take you up on that but I wouldn't want to get banned after you go negative. ;p

    Click here to enlarge Originally Posted by Sorena Click here to enlarge
    V2xV2 - V1xV1 = 2A(delta)X

    6263896 - 4044567 = 2A x 81000 ==> A=13.7 m/s

    F=13.7 x 9 ==> F= 123.3N
    Aren't you calculating wind resistance assuming the Vf and Vi mentioned in the article occurred over 81000 meters? You mixed up Vf and Vi, the acceleration should be negative as a result, ie. the projectile slows 13.7m/s from 2502m/s to 2011m/s over 81km.

    32MJ of energy as quoted in the article for phase 2 would only get the 40 lb projectile up to 1878m/s.
    Ek = 1/2mv^2
    32000000J = 0.5(18.14kg)v^2
    3528114 = v^2
    v = 1878m/s

    It would take 56MJ to hit 2502m/s since energy and velocity aren't linear.
    Ek = 0.5(18.14kg)(2502m/s)^2

    56MJ = 41303480 lbf*ft

    Also these railguns are worthless and not cool without the trace like in quake.

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    Click here to enlarge Originally Posted by scott_uw Click here to enlarge
    I'd take you up on that but I wouldn't want to get banned after you go negative. ;p



    Aren't you calculating wind resistance assuming the Vf and Vi mentioned in the article occurred over 81000 meters? You mixed up Vf and Vi, the acceleration should be negative as a result, ie. the projectile slows 13.7m/s from 2502m/s to 2011m/s over 81km.
    Yep, you are right. But i didn't read the article, i just saw Darkphantom's post. Click here to enlarge

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    Click here to enlarge Originally Posted by scott_uw Click here to enlarge
    I'd take you up on that but I wouldn't want to get banned after you go negative. ;p
    You have no chance. We can stream the match. Let's go Click here to enlarge

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    i would watch, just to verify a winner, and watch the text and crying fly if there is any.
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