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I know this is an old post, but recently this very question "Do guns work in space" came up between myself and a group of friends down the pub.I strongly argued against the possibility on the grounds that chemical reactions are pressure dependent, and in a vacum there is no atmospheric pressure.The science so to say, the greater the atmospheric pressure the bigger the bang, the lesser the pressure the weaker the reaction, down to the point where the reaction will simply fail to occure.My point, bullets arn't pressurised containers, so in a vacum they won't work.Was I horribly, horribly wrong on this point?
If they weren't 'pressurized', the very high pressures reached in the combustion would destroy the gun; atmospheric pressure is negligible, in comparison.
Quote from: lightarrow on 17/09/2009 18:51:46If they weren't 'pressurized', the very high pressures reached in the combustion would destroy the gun; atmospheric pressure is negligible, in comparison.Sorry I don't think I made myself clear. When I said bullets arn't pressurised containers what I meant was that the propellant would be exposed to the vacum.
My argument runs that as atmospheric pressure decreases, the power of the explosion within the bullet decreases with it, to the point that in a vacuum, the absence of atmospheric pressure will totally inhibit the explosive reaction needed for the bullet to be fired from the gun.