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Old December 18, 2018, 06:46 PM   #31
MarkCO
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Join Date: October 21, 1998
Location: Colorado, USA
Posts: 2,686
Quote:
Originally Posted by 44 AMP View Post
I think I grasp it pretty well, I just think it doesn't apply to cartridge cases the same way it does to a hose.
Sorry, had to laugh. I, like, most engineers I work with have a saying that follows when someone says "I think". It goes something like "Liar, Ignorant or too kind". Don't take it personal. Sometimes the math proves the assumption wrong.

Sorry the analogy did not help you, but be assured, the mathematical models I have run accounting for all relevant variables, both as a consultant for, and in doing my own product design on gasses from gunpowder and solid rocket propellants have clearly shown that form factor does impact pressures, and constriction of flow most definitely increases pressure. If I had made a mistake on a few of them, it would have made national news.
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