Lordanem Posted June 26, 2013 Share Posted June 26, 2013 Hi I'm looking to design a DIY gearbox and need to know the ratio of cylinder volume to barrel volume on a 'regular' aeg. Thanks Link to comment Share on other sites More sharing options...
Lordanem Posted June 27, 2013 Author Share Posted June 27, 2013 If you could just measure how far your piston travels from all the way forward to all the way back, piston diameter and barrel length, thats all I need. Thanks Link to comment Share on other sites More sharing options...
AK47frizzle Posted June 28, 2013 Share Posted June 28, 2013 On a regular AEG, the piston travels roughly 70mm front to back and vice versa. Diameter of the piston cylinder is roughly 25mm. Piston head diameter is roughly 23mm. Barrel length varies, not sure what you're asking about with the whole "ratio" thing, but in my AK47, the inner barrel length is 423mm Link to comment Share on other sites More sharing options...
Lordanem Posted July 2, 2013 Author Share Posted July 2, 2013 That will do Thanks for your response EDIT: Just worked it out 2.42 to 1 Link to comment Share on other sites More sharing options...
Rufe0 Posted July 2, 2013 Share Posted July 2, 2013 A cylinder with a diameter of 23mm and a length of 70mm is 29cc in volume. A cylinder 6mm diameter by 423mm is 12cc volume. So the cylinder is roughly 2.5 times larger than the barrel in volume. This is vital as if it wheren't as big no matter how strong the spring you had there simply wouldn't be enough air left to push the BB. It would be nice to know the sweet spot exactly, does anyone know of a detailed experment trying different length barrels keeping everything else equal? Link to comment Share on other sites More sharing options...
two_zero Posted July 2, 2013 Share Posted July 2, 2013 no clue. Link to comment Share on other sites More sharing options...
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