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Navy develops a 33 megajoule rail gun

By red1776
Dec 12, 2010
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  1. Technochicken

    Technochicken TechSpot Paladin Posts: 729

    In the slow-mo clip of the video you can see the camera's timer going. From what I can tell, it goes down to a hundred-thousandth of a second.
     
  2. captaincranky

    captaincranky TechSpot Addict Posts: 11,684   +1,877

    Well, in sort of an ironic final number, the projectile is traveling @ 1 mile per second! I say ironic, since when I was a boy, "a mile a minute" was sort of an iconic number.

    So, at a shutter speed of 1/5280th of a second, the projectile would travel about a foot.

    Accordingly @1/52800 of a second, the projectile would move about 1 1/4 inches during the exposure, and at a half millionth of a second perhaps an eight of an inch.

    I would guess that there's no mechanical shutter involved with this type of photography nowadays, just electronic switching. The frame buffer and the capture electronics would have to be spectacular though.

    Wiki says, (and we all know they don't lie) that the fastest high speed cameras are on the order of 200,000,000 FPS; http://en.wikipedia.org/wiki/High-speed_camera

    If you're in the market for one; http://www.photron.com/index.php?cmd=products

    What's really amazing about the video, is the fact that for a time, they seem to be panning the camera along the shell's path.
     
  3. red1776

    red1776 Omnipotent Ruler of the Universe Topic Starter Posts: 5,219   +157

    i wondered how that could be done, even electronically. There has to be some mechanics involved, doesn't there?
     

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