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Supersonic Pellets.

Discussion in 'Anything Airgun Related' started by RICHIE612, Oct 23, 2008.

  1. RICHIE612

    RICHIE612 Engaging Member

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    Here's a good idea.
    We all know that FAC Rifles or 12ft/lb rifles can propel a projectile be it light enough through the sound barrier, the only downside to this is its accuracy.
    Why not then have pellet manufacturers not designed a "super sonic friendly" pellet that maintains stability when breaking the sound barrier?
    Some might say they have made Heavy 30 Grainers but thats beside the point as that too avoids going supersonic.
    I'm sure a .22 rimfire bullet would fit nice and snug in a .22 barrel and also lightweight compared to some pellets for FAC Rifles.
    That would be a good invention I think.
    Please Discuss........
     
  2. 12BoreMax=P

    12BoreMax=P Posting Addict

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    yes good 1 mate but .. would that not brake the sub 12fp law

    for it to be supersonice it must be doing some feet per second :eek:
     
  3. RICHIE612

    RICHIE612 Engaging Member

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    Yes but I'm talking about FAC rifles here dude, being able to take advantage of extra velocity and extra ft/lb rather than just the extra clout and not much increase velocity you get with a High Power rifle using heavy pellets (30-40gr).
    As your prob aware that when a pellet goes supersonic it begins to wobble due to them being aerodynamicaly unstable compared to bullets, why naot make pellets for high power Air Rifles bullet shaped so that when they do go supersonic then they are just as stable as sub 12ft/lb subsonic pellets.
     
  4. Buzz

    Buzz Banned

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    To legally break the sound barrier with a pellet from a 12 ft/lb gun, the pellet could only weigh a fraction over 4.3 grains. I reckon that it's virtually impossible to make something, even in .177, down to that weight in lead that could withstand the G forces required to accelerate the pellet from 0 to 1116 ft/sec in the length of a rifle barrel, let alone stand the forces of the shock wave that would be created.
     
  5. a1gunner

    a1gunner Pro Poster

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    if they ever make a pellet that light you have to let me rip it to shreds with the girly cal. talk:D
     
  6. i8allthepies

    i8allthepies Posting Addict

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    If you hold a firearms certificate, why not just use a weapon that's designed for the job:confused:. It's a bit like trying to make a Reliant Robin do 150 m.p.h. safely - don't bother, buy an Aston Martin :up:
     
  7. Darren Petts

    Darren Petts Temporarily Alive

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    If you are going to break the sound barrier you need to break it by a big margin.

    The reason for that is you need to accelerate the projectile to supersonic speeds whilst in the barrel so the barrel can control the issues arising from stability as it passes mach1. On it's way to the target though the projectile needs to stay supersonic as it'll destabilise if it passes back through the sound barrier. The amount of air to do this is immense considering the projectile of necessity needs to be heavy to withstand the forces applied. You have massive problems of finding sufficient air to make a gun viable and the huge noise compared to a rimmy to attempt to silence.

    In other words a supersonic airgun is a pointless venture having no advantage at all over a rimmy but several disadvantages and that is why no pellets exist designed for the job.

    Ely magnums were indeed rimmy heads but these too were designed for subsonic use at about 40 grains.
     
  8. i8allthepies

    i8allthepies Posting Addict

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    As I said, use the tool designed for the job.:up:
     
  9. 12BoreMax=P

    12BoreMax=P Posting Addict

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    al get me coat mate :up:
     

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