O.K., so there is a large gas pressure right behind the shell when fired.
This pressure presumably enters the chamber provided by the bustle.
But, this chamber, as I understand it, is not vented; just connected to the
barrel interior by some ports.
So, the pressure in the chamber is probably about the same as the pressure
behind the shell ?
Therefore, how does it work; I can't see how if it's about the same pressure
as what's in the barrel after the shell leaves the barrel it does anything ?
Might some please explain in detail how this functions.
Thanks,
Bob
The ports are angled forward.
When the shell leaves the barrel the pressure drops.
High pressure gas from the extractor drives forward
= extracting = gas from the rear of the barrel.
Momentarily gas pressure in front of the breech is
- lower - than in the turret.
Open the breech NOW and fumes go out the barrel instead
of the turret.
So what size extractor / port design / position = timing margin.
Re: Youngs pressure barrel leaking everywhere ... However, my suggestion is to let it run out of gas, add the sugar again, ... and fill the soda bottles with it. ... bottles should come up to pressure.... I don't plan to use any bottles: The pressure barrel was sold to me as ... (rec.crafts.brewing)
Re: Heres one for Bob (hope it makes your head spin) ... The gas expanding in the confined area of the barrel...pressure) will undergo an equal change, in its own motion, ... propellant is totally consumed the resulting gas pressure is ... uniformly and equally applied to the barrel walls and the base of ... (comp.os.vms)
Re: Heres one for Bob (hope it makes your head spin) ... The gas expanding in the confined area of the barrel "blows" the ... You have described actions -- chemicals exploding, gas expanding,...mutual pressure) will undergo an equal change, in its own motion, ... A rocket motor operates in exactly the same fashion. ... (comp.os.vms)
Re: Whats the best powder to use in a short AR15? ... # bought the rifle...... # Garand or M1a using powders that are not the right pressure curve- too ... There's a couple of lengths of gas tubes on shorty ARs out there, ...barrel and have good functioning and accuracy, ... (rec.guns)
Re: Heres one for Bob (hope it makes your head spin) ... makes the *bullet* fly out the barrel.... As the pressure rises, the gases push in every direction. ... And gas pushing against the bullet is an action-reaction, ... (comp.os.vms)
