JustinJ
Member
Has anybody ever designed, made or tried to build a suppressor that seals the exit hole after the bullet leaves to trap gas inside? Obviously timing would be the tricky part, assuming it doesn't blow up.
Congratulations, you have reinvented the wipe.
I bet modern materials and some rocket science on the thickness and contour would give better results than the old sheet rubber. And no moving parts.
I know that is what you are talking about.
Kind of like an excess flow valve that slams shut when the fluid going through starts moving too fast.
I am not optimistic about moving parts in a hostile environment.
Using gases to operate other things is not a new idea on guns.
No "and" that was my point.I'm not sure what that statement is meant to contribute. That vast majority of new developments in self loading guns has been just a new or improved method of utilizing the expanding gasses. And?
http://en.wikipedia.org/wiki/OTs-38_Stechkin_silent_revolverThe closest is the Russians with their "gas trap" cartridges. They are special rounds of ammunition that have a piston behind the projectile. When the round is fired the piston propels the bullet forward out of the weapon, the piston is retained inside the cartridge case trapping the gas within and incidently silencing the weapon. I can't remember the nomenclature for the rounds or the specialty weapons that fire them. They were used by the KGB and whatever replaced it (FSV?) mostly and Spetznaz units seconded to intelligence work.
That's my take too.As i see it the real challenge is timing. Especially if different rounds are used with varying pressures.
There's definitely a timing issue if you want this thing to be of any value.There really wouldn't be a "timing" issue as long the "check valve" didn't close by the air being pushed out of the barrel by the advancing bullet.
I think this is what you are looking for
I once spoke to a guy from New Zealand about suppressors years ago. He mentioned that they had a type where a piston type valve was used to trap gasses by way of the pressure moving the valve (which was under spring pressure), and as soon as it dropped just a little the spring returned the piston type valve to seal the vent holes. I don't know how well it worked, but it sounded like it might seal off at least some of the gases from further expansion.
You go ahead with your "closing suppressor" idea - I think I'll stick with something that has a hole at the business end instead of a valve that opens and closes - it might be louder, and it might be quieter, but your idea of blocking off the gasses like that seems to me no better than playing "chicken" with M-80's as kids (I know at least 2 people that have lost a finger or fingers doing that stupid stuff 20 years ago).
The gas pressure that exits the muzzle is lower than the pressure at the chamber (the part just a few inches from your nose when you shoot a rifle). Instead of pressure I would worry about a bullet impact with a fouled "valve".Well lets think about this for a second - It takes a significant amount of gas, moving at a fairly fast speed to propel a bullet at 700+fps... Do we REALLY want to stop all that gas in the gun (more or less) that we're holding in our hand, near our face?