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Calculating air gun energy vs PSI & bore diameter
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[QUOTE="berkeman, post: 6000038, member: 8921"] I think you may be able to ballpark this using some simplifying assumptions... [LIST] [*]Assume that the driving pressure doesn't drop during the shot (requires a high pressure, moderate volume reservior) [*]Calculate the net force on the projectile using the driving pressure and atmospheric pressure (to give you the pressure difference) and the cross-sectional area of the barrel and projectile [*]That net force will accelerate the projectile for the duration of the barrel length [*]The projectile will exit the barrel with a velocity and energy defined by the force through the distance (length of the barrel) [/LIST] Does that make sense? Can you post those calculations so we can check them? Also, can you post what the first order corrections should be to this simplified calculation to get a better match to real-world numbers? :smile: EDIT / ADD -- and please be sure to include units in the equations you post -- that helps to provide a sanity check on calculations and unit conversions (like grains to grams to kilograms)... [/QUOTE]
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Calculating air gun energy vs PSI & bore diameter
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