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Pneumatic C:B ratio revisited

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: Gepard » Tue Jul 24, 2007 3:37 pm

Google "Online Conversion Energy"

Michael
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Unread postAuthor: SpudBlaster15 » Tue Jul 24, 2007 4:06 pm

1 joule = 0.737562149 foot pounds
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Unread postAuthor: DYI » Tue Jul 24, 2007 4:43 pm

Yeah... I already got that.
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Unread postAuthor: CpTn_lAw » Tue Jul 24, 2007 5:01 pm

Sorry DYI, i don't have any idea of the pressure involved in the shoot of a pumpkin or else lol!!


Oh, and the fun in sending an airsoft BB past the sound barrier is just to say to yourslef, you've thrown something faster than its own sound by you own means....
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"J'mets mes pieds où j'veux, et c'est souvent dans la gueule."
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Unread postAuthor: mtronic » Tue Jul 24, 2007 5:33 pm

that sucks about the restrictions you have in France for rifles :( At least you are one of a few that are able to make something thats just as good AND more fun to use.
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Unread postAuthor: CpTn_lAw » Tue Jul 24, 2007 5:42 pm

when you know the behavior of some people my age in france...restrictions are not so odd...the first question i get when showing my marble rifle is "could you kill someone with that????"........Maturity problem somewhere.
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Unread postAuthor: frankrede » Tue Jul 24, 2007 7:10 pm

Ha, I could have posted something racist but I'll omit it.

How much different can French teens and American teens be?
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Current project: Afghanistan deployment
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Unread postAuthor: Gepard » Tue Jul 24, 2007 7:14 pm

lol, reminds me of this picture:

http://qwildw.free.fr/junk-mail/euro_vs_america.jpg

Michael (From Europe)
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Unread postAuthor: mtronic » Tue Jul 24, 2007 8:17 pm

hahah its true, I hate fast food. Its filthy, but I love European women! The ultimate women probably would be a spud gun loving euro hottie
CpTn is ur gun in the showcase section?
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Unread postAuthor: Hubb » Wed Jul 25, 2007 12:23 am

Quick question about this pneumatic C:B. Would dead volume in a pneumatic fall under the "C", the "B" or neither?
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Unread postAuthor: Modderxtrordanare » Wed Jul 25, 2007 12:39 am

hubb017 wrote:Quick question about this pneumatic C:B. Would dead volume in a pneumatic fall under the "C", the "B" or neither?


Dead volume is the space in between the valve, and the projectile. It is where the gas is expanding, but is not pushing the projectile forward any.

I would say it is part of the "B's" volume, since when calculating a C:B ratio, you just find the volumes of both the chamber, and barrel.
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Spudding since '05. Proud waster of plumbing and plumbing accessories.

-Wiki
-How-To: Modding a Sprinkler Valve
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Unread postAuthor: Hubb » Wed Jul 25, 2007 12:43 am

I appreciate that. That is what I was thinking but I wasn't sure.
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Unread postAuthor: CpTn_lAw » Wed Jul 25, 2007 4:19 am

There is i guess no major differences between french teens and american teens...but giving a spudgun to a guy in harlem would be criminal, then giving a gun to a rebelious teen in "sarcelles" in france would be the same.

My gun is in the showcase forum yes...AIrsoft BB rifle 200 psi.
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Unread postAuthor: jackssmirkingrevenge » Wed Jul 25, 2007 7:39 am

mtronic wrote:hahah its true, I hate fast food. Its filthy, but I love European women! The ultimate women probably would be a spud gun loving euro hottie
CpTn is ur gun in the showcase section?


The Eastern Europeans are the best, nothing finer that a tall slender Ruski sweet-talking you in a Slavic accent *sigh*
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