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Thread: USN Free Electron Laser and Railgun - Cancelled.

  1. #91
    The member that no one remembers. IconOfEvi's Avatar
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    Quote Originally Posted by Einhander View Post
    I thought that magnetics are used in a "Gauss" accelerators, while "rail" one uses an electric arc to propel a dielectric projectile.
    Gauss and railguns are the same thing I think

    They use electricity to produce an incredibly powerful magnetic force. (aren't you an engineer?)

    Electricity and magnetism are linked forces

    * All electric forces produce their own magnetic fields - (example, an electromagnet)

    * Movement of magnetic fields produces electricity (dunno really how to word it) (ex, a generator)

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    Senior Member Halidon's Avatar
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    The device traditionally associated with the "Gauss" label is the Coilgun.

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    Quote Originally Posted by IconOfEvi View Post
    Gauss and railguns are the same thing I think

    They use electricity to produce an incredibly powerful magnetic force. (aren't you an engineer?)

    Electricity and magnetism are linked forces

    * All electric forces produce their own magnetic fields - (example, an electromagnet)

    * Movement of magnetic fields produces electricity (dunno really how to word it) (ex, a generator)
    They work by very different principals the railgun by the Lorentz force where the Gauss cannon / Coil Gun works through a series of electromagnets activated in series to accelerate the projectile down the barrel.

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    Didn't anyone consider employing 127mm ETC gun?

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    Purveyor of intelligent reading material Lt-Col A. Tack's Avatar
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    Quote Originally Posted by Halidon View Post
    Many thanks, sir.

    I do wonder what the rationale was for pursuing a railgun as opposed to a coil gun.

    Quote Originally Posted by Ambassador View Post
    Didn't anyone consider employing 127mm ETC gun?
    Something like That would still require the use of propellents; that a railgun doesn't need propellents is one of its virtues.
    Last edited by Lt-Col A. Tack; 02-07-2012 at 05:48 PM.

  7. #97
    Senior Member Halidon's Avatar
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    64MJ is still in the roadmap, but it slipped lower on the priority list. The initial plan was to ramp up to 64MJ with Lab weapons, then from there develop into a "production" weapon. But with the funding being threatened, Carr and others chose to make a run at getting a practical weapon to the fleet sooner and ramp up the power afterward. As he points out, at the 33+ MJ figure they can have a practical at-sea demonstrator by FY2019. To get to 64MJ (and fit in existing ships) they'd need 3-5 more years to shrink the power system.

  8. #98
    Senior Member Halidon's Avatar
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    Some more pictures of the BAE gun:
    http://www.militaryphotos.net/forums...=1#post6026185

    Quote Originally Posted by Lt-Col A. Tack View Post
    Many thanks, sir.

    I do wonder what the rationale was for pursuing a railgun as opposed to a coil gun.
    Sorry, I missed this. A coilgun of 33MJ would be heavier and more complex than a 33MJ railgun, with less muzzle energy. They're great from a durability standpoint, but switching and resistance issues are their own developmental nightmare. Coils at lower power/velocity, however, have real potential. DARPA's working on a coilgun vehicle mortar, for example.

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    Senior Member Halidon's Avatar
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    In case anyone was wondering about Railgun and FEL in the Budget released today:

    The Railgun program's budget is more than doubled to support testing of 2 prototypes and development of the pulsed power system and rapid fire technology. Projectile development is also pressing ahead.

    FEL's budget is harder to p**** since its part of an umbrella program, though that umbrella's budget has been halved so its clearly not in as good shape as Railgun. FEL will continue "Phase II" which is development of the 100kw demonstrator, however, so its not dead. Mostly it seems to have been stretched out in favor of Railgun and an interest in getting Solid State Lasers to the fleet faster than FEL can be ready.

    Source: R&D funds (PDF)

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    Senior Member Halidon's Avatar
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