Searching For Info /Apps to Calculate Velocity when Elevation Increases

Discussion in 'ELR, Ballistics & Bullets Board' started by LA50SHOOTER, Feb 19, 2018.

  1. LA50SHOOTER

    LA50SHOOTER Gold $$ Contributor

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    Good Day Gent's -
    As the title says - I'm Searching For Info /Apps to Calculate Velocity when Elevation Increases. (or decreases) - The significance of this is more pronounced at ELR of course.
    - I'm looking for "substantiated" / "scientific" type information, please.
    - I know that if I have a load that produces xxxx.x fps at sea-level then my velocity will increase as elevation increases due to air density being less. - If someone can "point" me to an application (software) or similar way to calculate I'll be very appreciative.

    Thank You In advance - Ron -
     
  2. Bart B.

    Bart B.

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  3. LA50SHOOTER

    LA50SHOOTER Gold $$ Contributor

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    Thank You Bart - Appreciate It !!
     
  4. chromatica

    chromatica

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    There is a very good treatment of this subject in a book called Modern Exterior Ballistics, by Robert McCoy.
     
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  5. JPeelen

    JPeelen

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    And, quite surprisingly, "Modern Exterior Ballistics" by Robert McCoy can be downloaded from archive.org. Its the 2nd edition, which has the many printing errors of the 1st edition corrected.
     
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  6. Ledd Slinger

    Ledd Slinger Gold $$ Contributor

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    Ron,
    I have the "Shooter" app on my phone, but a lot of times I'll just go to the calculator Berger has on their website. They also have a bullet stabilization calculator where you can figure out acceptable barrel twist rates for stabilizing bullets at different elevations.
     
    Last edited: Feb 22, 2018
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  7. LA50SHOOTER

    LA50SHOOTER Gold $$ Contributor

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    I'll have to check out the Berger Ballistic App your speaking of. - The old one that I have from them didn't have an elevation parameter to input. It was also a downloaded (windows based) version I had saved in a folder on a Lap-top probably 5-6 yrs ago. - Thanks Ron
     
    Last edited: Feb 22, 2018
  8. LA50SHOOTER

    LA50SHOOTER Gold $$ Contributor

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    Just Found it(Berger's Ballistics Calculator - And Does have Elevation !!) - Thank You !!
     
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  9. DocUSMCRetired

    DocUSMCRetired

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  10. LA50SHOOTER

    LA50SHOOTER Gold $$ Contributor

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    Thank You Doc, Much Appreciated !!!

    - Ron -
     
  11. damoncali

    damoncali Gold $$ Contributor

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    Be warned. McCoy’s book assumes you understand multivariable calculus, and have the ability to numerically solve systems of differential equations. If you don’t know what the above means, 90% of the book will go over your head. There’s still some cool stuff in there for laymen, but it’s basically a college engineering textbook.

    Bryan Litz’s book “Applied Ballistics for Long Range Shooting” is far more approachable and doesn’t assume much knowledge at all. It’s the best non-engineering book on the topic by far.
     
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  12. LA50SHOOTER

    LA50SHOOTER Gold $$ Contributor

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    I'm good to go - Thanks !!
     
  13. 338 dude

    338 dude

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    Try the Shooter app by Kennedy group
     
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  14. F4D

    F4D

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    Strelok Pro app at 10 bucks is very good.
     

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