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3D printed rail guns

Fires at 560mph. Here’s a video:

Posted in uncategorized on October 19th, 2015 by SayUncle | RSS 2.0 |

8 Responses to “3D printed rail guns”

  1. jc Says:
    October 19th, 2015 at 10:23 pm

    That’s a bit under 800 fps.

  2. Jake Says:
    October 20th, 2015 at 9:28 am

    I certainly wouldn’t want to get shot with it, but I saw a video from another angle yesterday that showed that the projectile bounced off the plywood target.

    Neat project, though, and brilliant use of 3D printing for homebuild projects.

  3. Jay Says:
    October 20th, 2015 at 9:51 am

    Slower than my 1911 at the muzzle, and let’s not talk about my old 220 Swift (4000+ fps ~ 2700 mph)

  4. JohnnyDerp Says:
    October 21st, 2015 at 1:07 am

    Have you ever seen one of those +5 Farad capacitors fail? Lots of shrapnel I wouldn’t want to be in close proximity to if they go boom

  5. HL Says:
    October 21st, 2015 at 9:21 am

    It’s a great start. Baby steps.

  6. Phenicks Says:
    October 21st, 2015 at 2:07 pm

    Not to be a moron, but how do you get non-ferrous metals to work as ammo in essentially an electromagnet?

  7. Jake Says:
    October 21st, 2015 at 3:42 pm

    Phenicks: As I understand it, the projectile only needs to be conductive*, not magnetic. The current through the rails interacts with the current across the projectile and generates a force perpendicular to the current across the projectile (which just happens to be parallel to the rails).

    Wikipedia has a decent overview of the principles involved.

    * You can also use a non-conductive projectile and propel it with either plasma or a conductive carriage.

  8. Aaron Says:
    October 22nd, 2015 at 6:34 pm

    560mph is 821fps
    he said the tungsten projectile is 15 grams, which is about 225 grains.
    If that was the projectile that reached 821fps it should have a muzzle energy of about 337 ft-lbs.

    So, must not have been the tungsten. Maybe the aluminum? that would be (if the same volume) about 31.5 grains, and deliver 47 ft-lbs of muzzle energy.

    Not the aluminum either, I think.

Remember, I do this to entertain me, not you.

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