Rail Guns

Discussion in 'General Science' started by Wendy, Dec 18, 2010.

  1. Wendy

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  2. nerdegutta

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    YES, that would be nice... :D:D:D
     
  3. jpanhalt

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  5. jpanhalt

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    1200 feet per second. Do you know the speed of sound? That is quite fast for a BB gun.

    John
     
  6. Wendy

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    It's one of the things that will get your thread closed here at AAC. There are some very good sites out there devoted to the subject though, and we still get people who are experimenting with them in now and again.

    If those Estor caps ever turn out to be more than vaporware there are some interesting technologies that could help make them practical.
     
  7. thatoneguy

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  8. maxpower097

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  9. maxpower097

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  10. shortbus

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  11. Wendy

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    To an experienced hobbiest I doubt it is that difficult. Odd part is, it is actually easier in theory than a lot of folks think. The hard part is the incredible amount of current it requires.

    A true rail gun does not need coils at all. It uses counter EMF generated with a slug of metal is between two metal rails (hence the name). I've always thought the blast of plasma at the end (which resembles the blast from a chemical weapon) was really cool.

    Basically it is a solenoid on steroids.

    http://en.wikipedia.org/wiki/Rail_gun
     
  12. maxpower097

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  13. shortbus

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    maxpower097 - The ram/pulse jets remind me of the little ads in pop mechanics and pop science from the 1960's selling the plans to make the engine and a helicopter that used the jets on the rotor tips.

    Ahh,the good old days, you could go into almost any drugstore or market and buy saltpeter, sulfur and many other chemicals to make your own fireworks and black powder :) Not that I ever did anything like that, anyway the statute of limitations has run out on those things anyhow.
     
  14. Wendy

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    Depends on whether they find the bodies or not. :p
     
  15. retched

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    Or the thousands of fingers that were lost due to short fuses.

    I remember my grandfather talking about a friend of his who had always collected spent brass shells from local out-door firing range.

    Sometimes the "big guns" would show up and put on a demonstration.

    He sat a 5gal bucket near the ejector and "caught" dozens of 6" shells.

    One of his favorite past times was taking match heads and cram-a-laming them in to the shell casings. By complete accident, he used a wooded dowel for all of his previous works. These newer shells had a much larger opening so the smaller wooden dowel wouldn't compress them well.


    Oh looky here! A metal rod of the PERFECT diameter!

    Well, he has 3 fingers left.

    The act of cram-a-laming the match-heads into the shell casing caused a spark and Ka-blewey.

    Not a good idea kids.

    I also remember hearing from a friend of mine in high school about a similar "finger removal". This kid was doing basically the same thing, but he ran out of match heads.

    Oh looky here! Strike-on-anywhere matches!

    I dont have a finger count on this one.

    BUT, the act of cram-a-laming the strike on anywhere matches caused ignition and finger-removal.


    The moral: Keep your fingers attached to your hand.

    Buy your fireworks and use a resistor or electric match to light them.
     
  16. shortbus

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    Yeah all the modern day safety stuff should be used! My Mothers dad worked at the Ohio Blue Tip match company and used to bring us kids home small amounts of the mix that was put on the matches. My uncle showed us how to fill empty rifle cases with the mixture to make rockets, kind of like the ones made with a book match and tin foil. But MUCH more powerful. Ahh the good old days ;)
     
  17. Clay

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  18. maxpower097

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    Last edited: Jan 16, 2011
  19. BillO

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    There is a way to make these little 'match head' rockets safe. You need to make sure pressure cannot build up to dangerous levels.

    ...
     
    Last edited by a moderator: Jan 7, 2011
  20. Wendy

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    To folks in the know most of the chemicals are still available, but sold for specific uses. I remember seeing a list on another forum a while back. It doesn't need repeating here, but all the chemicals can be bought for specific applications (such as stump removal) at a hardware store.
     
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