some people saying longer barrel can keep valve open longer due to internal pressure and offer more air when it's firing. that's why increase the velocity.
but some other poeple saying more air can be only produced by heaver hammer or spring and has nothing to do with longer valve opening time. also the longer barrel doesn't make valve opening time longer.
very confussed. which one is true?
if the barrel length doesn't work with valve opening time. then after every shot. the amount of air should be always stay the same. no matter what barrel length has been used.
but longer barrel should have more resistance force from rifling. if the amount of air pressure stays the same behind the pellet after each shot. if we use 50" barrel. will that make velocity higher or lower?
after pulled the trigger.
hammer hits valve.
valve opens and release the certain amount of air to push the pellet.
pellet traveling in the barrel and the valve keep open and release air due to chamber pressure until the pellet get out of the muzzle. the valve closed.
if above theory is wrong. so. can i define following theory:
the longer barrel DO NOT keep valve open time longer but only use the same amount of air more efficiency to increase the velocity.