Talk:Piston valve

Info on chamber-sealing piston is needed. --GalFisk 31 October 2005 06:51 (CST)

put up the 3 flash animations... and find mine on spudfiles.

Wiki doesn't support flash (as far as I can see), is there a site we can link to, which has the same info as the sticky on spudtech? --GalFisk 10:16, 23 March 2006 (EST)

...do we really need a second explanation for barrel sealers?

Is "honking" really a problem?

I'm not sure that honking from a gun is really much of a problem. When you hear a valve honk the projectile has long since left the barrel. Your brain really can not process a sound in the time it takes the projectile to transit the barrel, which typically would be in the 2mS to 20mS range. The real question is did the valve honk while the projectile was still in the barrel? Maybe it did and maybe it didn't. Off hand I can't think of any way to easily determine if the valve honked while the projectile was still in the barrel.

My gut feeling says that, in general, honking occurs after the projectile has left the barrel (and therefore is not an issue unless you don't like your gun sounding like a Mallard).

I would think that honking occurs when the pressure in the chamber/barrel is less than the pressure behind the diaphram/piston. As long as the projectile is in the barrel the pressure in the barrel/chamber is kept at a relatively high value. Once the projectile leaves the barrel the pressure in the barrel/chamber drops very fast and this would be the time when it would be most likely that the chamber/barrel pressure drops below the pilot pressure.