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Question Tradjectory.

Discussion in 'Anything Airgun Related' started by FXpoacher, Jun 6, 2008.

  1. FXpoacher

    FXpoacher Engaging Member

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    OK i get the bit about why a pellet drops towards the end of it's tradjectory, but why does it start to lift the moment it leaves the barrel?.:confused:

    Keep it in laymans terms though!!:D
     
  2. topcat

    topcat Posting Addict

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    ITS ALL DOWN TO GRAVITY
     
  3. a1gunner

    a1gunner Pro Poster

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    what the pellet lifts as it leaves is that what you mean?
    can you see the pellet travel up the scope:confused:

    in other words do you see it hit the milldots going up, the dropping back down?

    because your scope is zeroed to put up with the pellet drop.
    the scope is facing down so the barrel faces up.

    when the pellet comes out the barel line and scope line cross as the pellet 'goes up' and then the pellet crosses the line again as it comes back down.

    is that what you meant?:confused:
     
  4. FXpoacher

    FXpoacher Engaging Member

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    What so gravity push's upwards where you live?

    A1 got the jist of it.
    I'm talking about the UPWARD travel, just before gravity takes control.
    All rifles do this, but why?
     
  5. Buzz

    Buzz Banned

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    FX...in order to hit a distant target without any gravity you would just aim straight at it and you'd hit it. With gravity it would fall short, so YOU make it go up by the amount IT drops under the effects of gravity. There are many factors other than gravity which effect the actual trajectory, speed being the main one, so a pellet travelling faster will have a flatter curve than one travelling slower.
     
    Last edited: Jun 7, 2008
  6. topcat

    topcat Posting Addict

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    i thought you wanted a simple answer you got one. dont try and bellitle me .till you no what your talking about
     
  7. Andy

    Andy Administrative Staff Member Founder

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  8. a1gunner

    a1gunner Pro Poster

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    just worth mentioning the faster the bullet the less time things can effect it.

    which is why .177 flies flatter than .22 as it moves a bit faster.

    the pellet does not physically move up after leaving the barel (unless its a random flier)

    but all pellets leave the barrel and go flat for a few yards before dropping in flight.

    this phenominom of pellets coming up are the barrel pointing up and the scope pointing down as i said above:)
     
  9. EX Mod Cog

    EX Mod Cog Keyboard Hero

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    I really don't think they do, they just appear to through the scope, I've never heard of this before.
     
  10. a1gunner

    a1gunner Pro Poster

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    there are pellets that go up sometimes.
    get smk pelets. they fly so randomly they go upsometimes:D
     
  11. Buzz

    Buzz Banned

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    Does this help at all ??


    [​IMG]

    It's also why you get 2 zeros, one short range and another longer.
     
  12. a1gunner

    a1gunner Pro Poster

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    well thats what i said in a picture.

    a picture speaks a thousand words i guess.
    just wish i could draw i'd save so much time!:D
     
  13. Andy

    Andy Administrative Staff Member Founder

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    Trajectory does not have a D in it. :D
     
  14. Buzz

    Buzz Banned

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    I didn't put one in !!:rolleyes:
     
  15. FXpoacher

    FXpoacher Engaging Member

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    Thanks Buzz!
    Explains it perfectly.
    Was looking at the tradjectory print outs on chair gun, which i know shows an exagerated curve, but i couldnt work out why it would upwards before it goes down.
    Cheers mate!

    Oh and Topcat
    Quote:i thought you wanted a simple answer you got one. dont try and bellitle me .till you no what your talking about.

    I asked for an explanation, and now i got one. So now i know what i'm talking about can i "bellitle" you now?.
    Get a sense of humour!
     
    Last edited: Jun 6, 2008
  16. a1gunner

    a1gunner Pro Poster

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    the tragetory print out is the pellets path compared to she scopes zero:up:
     
  17. FXpoacher

    FXpoacher Engaging Member

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    So with open sights, you would aim smack on, out to the point the pellet starts to drop?
     
  18. a1gunner

    a1gunner Pro Poster

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    with open sites you look down the barrel.

    if the sites were 90 degrees to the barel the pellet would leave and drop.
    you would not have the pellet coming up to 'meet' your line of site.

    again like the scope the open sites need to be set so that the barel points up a little
     
  19. Buzz

    Buzz Banned

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    FX, just like A1 says, it doesn't matter what type of sight you have, the same principal applies. The rear sight of open sights have a jacking screw to lift/lower it and a screw to move it sideways, just like the elevation and windage turrets on your scope. The only benefit you have with the scope over open sights is one of magnification, tragectory remains unaltered.
     
  20. FXpoacher

    FXpoacher Engaging Member

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    quote:
    again like the scope the open sites need to be set so that the barel points up a little

    Now it is all clear as glass!
    Never really thought about it before, just aimed high, low or smack on.

    Cheers guys!
     

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