Talk:Air gun

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various corrections[edit]

First CO2 is indeed a liquid under pressure. It does not exist as a liquid at "room" pressure.

For spring piston guns the piston compresses the air in the tube containing the piston. The air is heated in this tube by the compression of the piston. There is a transfer port which throttles the air into the bore behind the pellet.

"Spring-piston guns have a practical upper limit of 1250 ft/s (380 m/s) for .177 cal (4.5 mm) pellets. Higher velocities cause unstable pellet flight and loss of accuracy.[citation needed] Drag increases rapidly as pellets are pushed past the speed of sound, so it is generally better to increase pellet weight to keep velocities subsonic in high-powered guns. Sonic crack from the pellet as it moves with supersonic speed also makes the shot louder sometimes making it possible to be mistaken for firearm discharge and drawing unwanted attention. Many shooters have found that velocities in the 800–900 ft/s (270 m/s) range offer an ideal balance between power and pellet stability." This would be true for any pellet gun, not just spring piston type.

"Spring guns, especially high-powered ones, have significant recoil resulting from the forward motion of the piston." Well, the piston moves forward then recoils. The piston is recoiling before the pellet ever breaks free and starts moving down the barrel.

"Spring gun recoil also has a sharp forward component, caused by the piston as it hits the forward end of the chamber when the spring behind it reaches full expansion." The piston should never should hit the forward end of the chamber. Rather the piston reaches its maximum forward travel in the chamber and recoils due to the compression of the gas pushing the piston back. The pressure builds in the chamber because the transfer port limits the gas transfer to the barrel.

"PCP guns have very low recoil and can fire as many as 500 shots per charge." Don't know of any typical rifle/piston that gets that many shots from HPA. 50 is probably closer to a reasonable upper limit. — Preceding unsigned comment added by 98.94.38.184 (talk) 02:49, 28 May 2011 (UTC)

rewrite or delete[edit]

Air_gun#Dart ---> WP:NOTHOWTO

186.58.198.133 (talk) 23:19, 17 December 2012 (UTC)

I've removed the section; it was uncited, just a "how-to", like you say. Haploidavey (talk) 23:27, 17 December 2012 (UTC)

this is so messed up. so much wrong info.[edit]

You cant learn anything here. Micko32 (talk) 11:42, 29 January 2014 (UTC)

For instance? --Scalhotrod - Just your average banjo playing, drag racing, cowboy... (talk) 16:20, 29 January 2014 (UTC)