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Recent content by Analytical Rifleist

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    Range Report Horizontal Coriolis - Computing Average Velocity

    Correction to Correction to ......
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    Range Report Horizontal Coriolis - Computing Average Velocity

    To altsniper and OF&B: Compared to all the references I have handy, the equation listed with the constant 7.3 e-5 is missing a factor of two. It is interesting that dropping the factor of two and using total flight time should give results very similar to using 2 * 7.3e-5 and the vacuum...
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    Range Report Horizontal Coriolis - Computing Average Velocity

    altsniper: OF&B has listed the correct formula, but I fear the issue of velocity may remain. For the vacuum trajectory the muzzle velocity is correct but the air through which the bullet moves has a local velocity, thus should effectively create a wind. The Didion model for wind drift...
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    Range Report Crosswind Effect on Vertical Path of Flight

    Cross Wind Discussion Deflections and Drift of a Bullet in a Crosswind http://www.exteriorballistics.com/ebexplained/articles/article2.pdf
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    Range Report Mathematical formula for ballistic chart to use in Excel?

    Formulas: No stinkin' calculus needed for Pejsa
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    Range Report Mathematical formula for ballistic chart to use in Excel?

    Formulas JD: What bullets are you interested in, and what data do you have? Using velocity measurements on high power rifles, I have several formulas and spread sheets, but none online. For pistols, I don't know if the rifle formulas as written would work but math is easy to change if we...
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    Advanced Marksmanship Ballistics formula

    K2 Are you still interested these many months later? Velocity profiles decouple the equations. AR P.S. I agree with your comment about McCoy's book
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    Advanced Marksmanship Ballistics formula

    p_pops: "It's an analytical maturity to the industry that's progressing. Data->Information->Knowledge" I think W. E. Deming called this "profound knowledge". The next generation of devices is being constructed, and may already exist someplace. It will give both velocity and...
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    Advanced Marksmanship Ballistics formula

    I should add that what has changed over years is that bullets today are mostly all stable for much of their trajectory and at high speed have a simple V(S) profile so it is possible to do the trajectory "bookkeeping" in a way that was not possible in and around Mach 1.
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    Advanced Marksmanship Ballistics formula

    p_pops: If you are designing bullets or guns, you definitely need drag functions. If you are shooting, most all the information you need is what is on the back of the box these days along with a way to find your muzzle V. I don't see a way around some sort of calculator, but it doesn't have...
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    Advanced Marksmanship Ballistics formula

    Pinecone: You have the basic idea. More accurately, drop is based on both time and drag; drop is less than1/2 GT^2 from the factor (V/Vz)^.3
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    Advanced Marksmanship Ballistics formula

    p_pops -- Thanks for the note. I suspect that for every one who is motivated enough to actually do a post, there are dozens who are interested, so nothing gets "wasted".
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    Advanced Marksmanship Ballistics formula

    While interest in this thread may have waned in the months gone by, I would like to note there is a two equation formula for drop posted on my web site, Trajectory Parameters - The Analytical Rifleist. It relies on the velocity parameters describing the bullet trajectory which can be acquired...
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    Range Report Trajectories WITHOUT drag functions using Velocity Tables

    While the central purpose of external ballistics is to predict where the bullet is gong to land, the other purpose is to explain how bullets fly. Many people on shooting sites have requested simple explanations of how bullets fly, to be told it is way too complicated to explain easily. I beg to...
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    Range Report Barrel length vs muzzle velocity vs accuracy test

    Whatever else, data is always interesting. Thank you for the post. Most everyone here knows that each bullet and barrel must have a separate powder adjustment to get max. velocity consistent with harmonic control. At theoretical optimum, the energy of the bullet, .5 m v^2 will go up...
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