I was bored, and being a nerd, I started thinking about both physics and Nerf at the same time. If a barrel is too short, the dart spins out. Too long = too much resistance, which leads to poor range. So what exactly IS the ideal barrel length? Not that it really matters to have it down to three decimal places, but it might be cool. I'm about a third of the way there to calculating a formula relating barrel length and air pressure, but I need some help.
The way I figure, once the dart has left the barrel, any excess air pressure will only cause the dart to spin out and lose accuracy, so the ideal length SHOULD be one in which the pressure in the barrel reaches 14.7 psi (pressure @ sea level) just as the dart exits the barrel. The only problem with this is that the results would yield an extremely long barrel length, since the formula neglects the friction of the dart on the brass* barrel.
I have an idea for an experiment to measure the resistance of the dart in the barrel, but I'm not sure how accurate the results would be. I'll try to draw up a flash doc to show you how it would work. In the mean time, anyone have any input?
*For these calculations I assume we are using straightened micro stefans being fired from a home made (Where pressure can be measured) with a brass barrel.
Sniper5000Member Since 29 Dec 2002
Offline Last Active Jul 20 2005 07:58 AM
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