Pneumatic C:B ratio revisited

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
Gepard
Specialist 3
Specialist 3
Posts: 342
Joined: Mon Jun 18, 2007 11:12 am

Tue Jul 24, 2007 3:37 pm

Google "Online Conversion Energy"

Michael
SpudBlaster15
First Sergeant 3
First Sergeant 3
Seychelles
Posts: 2400
Joined: Wed Oct 18, 2006 11:12 pm
Has thanked: 2 times
Been thanked: 10 times

Tue Jul 24, 2007 4:06 pm

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras nec placerat erat. Vivamus dapibus egestas nunc, at eleifend neque. Suspendisse potenti. Sed dictum lacus eu nisl pretium vehicula. Ut faucibus hendrerit nisi. Integer ultricies orci eu ultrices malesuada. Fusce id mauris risus. Suspendisse finibus ligula et nisl rutrum efficitur. Vestibulum posuere erat pellentesque ornare venenatis. Integer commodo fermentum tortor in pharetra. Proin scelerisque consectetur posuere. Vestibulum molestie augue ac nibh feugiat scelerisque. Sed aliquet a nunc in mattis.
Last edited by SpudBlaster15 on Wed Jul 14, 2021 4:50 pm, edited 1 time in total.
User avatar
DYI
First Sergeant 5
First Sergeant 5
Antigua & Barbuda
Posts: 2862
Joined: Sat Jul 07, 2007 8:18 pm
Location: Here and there

Tue Jul 24, 2007 4:43 pm

Yeah... I already got that.
User avatar
CpTn_lAw
Corporal 5
Corporal 5
Posts: 987
Joined: Sun Sep 11, 2005 9:10 am
Location: France

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....
"J'mets mes pieds où j'veux, et c'est souvent dans la gueule."
User avatar
mtronic
Specialist 2
Specialist 2
Posts: 291
Joined: Sat Jun 23, 2007 6:21 am
Location: everywhere at once

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.
User avatar
CpTn_lAw
Corporal 5
Corporal 5
Posts: 987
Joined: Sun Sep 11, 2005 9:10 am
Location: France

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.
"J'mets mes pieds où j'veux, et c'est souvent dans la gueule."
User avatar
frankrede
Sergeant Major 2
Sergeant Major 2
Posts: 3220
Joined: Thu Jul 20, 2006 9:47 pm
Has thanked: 1 time
Been thanked: 1 time

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?
Current project: Afghanistan deployment
Gepard
Specialist 3
Specialist 3
Posts: 342
Joined: Mon Jun 18, 2007 11:12 am

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)
User avatar
mtronic
Specialist 2
Specialist 2
Posts: 291
Joined: Sat Jun 23, 2007 6:21 am
Location: everywhere at once

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?
User avatar
Hubb
First Sergeant 2
First Sergeant 2
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Contact:

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?
User avatar
Modderxtrordanare
Corporal 2
Corporal 2
Posts: 686
Joined: Mon Nov 20, 2006 1:22 pm
Location: Texas

Donating Members

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.
Spudding since '05. Proud waster of plumbing and plumbing accessories.

-Wiki
-How-To: Modding a Sprinkler Valve
User avatar
Hubb
First Sergeant 2
First Sergeant 2
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Contact:

Wed Jul 25, 2007 12:43 am

I appreciate that. That is what I was thinking but I wasn't sure.
User avatar
CpTn_lAw
Corporal 5
Corporal 5
Posts: 987
Joined: Sun Sep 11, 2005 9:10 am
Location: France

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.
"J'mets mes pieds où j'veux, et c'est souvent dans la gueule."
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 26203
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 569 times
Been thanked: 344 times

Donating Members

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*
hectmarr wrote:You have to make many weapons, because this field is long and short life
Post Reply