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 (talk) 02:49, 28 May 2011 (UTC)

rewrite or delete[edit]

Air_gun#Dart ---> WP:NOTHOWTO (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)

"projectile weapons"[edit]

Even target pistols are considered weapons. Air guns can and have been used in war and in hunting, and are typically categorized as weapons. Many jurisdictions even regulate them as firearms. So I think it's correct to describe them as "projectile weapons" in the lead. Rezin (talk) 02:55, 20 December 2014 (UTC)

It's a sensitive subject, but the wiki page linked describes weapons as "device[s] used in order to inflict damage or harm to living beings, structures, or systems". Whilst initially developed as a "weapon" by that, or any definition, I am not sure that "weapon" correctly describes modern air guns or their usage. Yes, they can and are used to hunt, but I suspect most are used for plinking or target practice. Lumping them in the same category as "intercontinental ballistic missiles" seems a little extreme, regardless of whether certain jurisdictions consider them firearms (and that is a legislative definition only) they are not, and can never be, by literal/mechanical definition a "firearm"). Stephenjh (talk) 13:09, 20 December 2014 (UTC)
Slingshots are weapons too, just ask Goliath. But your solution of linking to Pneumatic weapon is good. Thanks for finding that. Rezin (talk) 17:57, 23 December 2014 (UTC)