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bolt air passages design

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Old   July 25, 2003, 08:47
Default bolt air passages design
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I need your help on how to design the most most efficient CO2/compressed air passages of the bolt of a paintball gun. It should be the highest flowing design knowing the fluid released vertically from a valve has to come out of the barrel horizontally. Stock bolt passages have the input bore radial to the the output bore. Some aftermarket bolt have a ramped inlet which is higher flowing. Also there is a restriction at the output of the valve (1/4" diameter hole).

Which free software would suit to help me find the highest flowing passages (input bore angle and passages diameters) ? Could you give some advises (I can provide more info) ?
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