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Thread: any ideas guys

  1. #1
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    any ideas guys

    i need to know what 690 feet per second converts to in ftlb please anyone

  2. #2
    It doesn't, the one is velocity and the other is energy.
    You need to supply more information.
    It's the calibre of the shooter that counts not the calibre of the rifle.

  3. #3
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    Quote Originally Posted by 8x57 View Post
    It doesn't, the one is velocity and the other is energy.
    You need to supply more information.
    well a friend of mine was asking me if his rifle is fireing 690 fps through a crono what does it work out to the nearest ft lb??

  4. #4
    Quote Originally Posted by mal mason View Post
    i need to know what 690 feet per second converts to in ftlb please anyone
    You need to specify the mass. Is he firing 25lb shells, or .177 pellets or something in between? Regards JCS

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  6. #6
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    Quote Originally Posted by klunk View Post
    Is this the sort of thing you're after? http://www.pyramydair.com/article/Wh..._August_2003/5
    Thanks klunk that was all i was asking spot on sorted now cheers

  7. #7
    Quote Originally Posted by mal mason View Post
    i need to know what 690 feet per second converts to in ftlb please anyone
    There's a formula that I'll try and find for you - it's something like velocity x velocity x mass (g) divided by x.... if you're talking about a .22 air rifle pellet they you're under 12ft/lbs, and if you're talking about .17 air rifle pellet you're well under (approx 10ft lbs) - though obviously depends a lot on exact weight of the pellet!

  8. #8
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    Quote Originally Posted by mal mason View Post
    i need to know what 690 feet per second converts to in ftlb please anyone
    I think this may help answer your question.

    Look down the list, select a pellet weight and type that into the calculator along with your "fps" number and you'll have an answer.

    http://extorian.co.uk/shooting/pellets.html

  9. #9
    Quote Originally Posted by jcampbellsmith View Post
    You need to specify the mass...
    And this is the correct response.
    Brian.

    Just because you are paranoid, doesn't mean they aren't out to get you......

  10. #10
    Quote Originally Posted by klunk View Post
    Is this the sort of thing you're after? http://www.pyramydair.com/article/Wh..._August_2003/5
    LOL yeah that was it - well done klunk!

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