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brianthebrains sawnoff riot gun replica

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: frogy » Thu Jul 27, 2006 9:53 am

Lol, only 40 bars? cmon that's only what? 580psi?

Nice gun though, it's not really a replica, lol, but it sure is cool looking...
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Unread postAuthor: LucyInTheSky » Thu Jul 27, 2006 10:46 am

How are you getting it up to 40bar btw?
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Unread postAuthor: killagorrila99 » Thu Jul 27, 2006 10:34 pm

well its called a very large compressor
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Unread postAuthor: killagorrila99 » Fri Jul 28, 2006 4:23 am

:roll: :oops: :oops: :oops: :oops: :oops: :oops: :oops: :oops: :oops:
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Unread postAuthor: killagorrila99 » Fri Jul 28, 2006 4:38 am

lol i just built one of those piston thing and im testing it this weekend
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Unread postAuthor: MrCrowley » Tue Aug 01, 2006 4:18 am

did you say it can go up to 40bar?isnt that metric version of PSI as i live in New Zealand and NZ uses that, 10bar is 1000kpa and 700kpa-102psi so 40bar is 4000kpa which is like 600psi...isnt it? :D

edit:just saw frogys post as i didnt know there was a 2nd page woopz :oops:
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Unread postAuthor: carlbelcher » Tue Aug 01, 2006 4:26 am

Yes, it's exactly 580.150951 PSI which doesn't sound safe to me but...

Anyway, MrCrowley why did you go though the trouble of converting bar to kpa and then kpa to psi when you could just type "40bar in psi" into Google and have your answer.
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Unread postAuthor: MrCrowley » Tue Aug 01, 2006 4:36 am

because i use kpa/mpa and bar as New Zealand uses it so its easy for me to do and i thought i would explain it umm yeah thats it... :D
i dunno its just how i do it, i dont see bar/mpa/kpa as 3 different units i see them as one kinda thing....some guy im buying my valve from said the pressure rating is 1mpa=10bar=1000kpa=145psi

edit:i dont need no internet converter i know psi/bar/kpa/mpa :D im my own converter 8)
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Unread postAuthor: frogy » Tue Aug 01, 2006 1:08 pm

Carl didn't understand that MPA and KPA were varients of bar

Google Def's:
pascal: a unit of pressure equal to one newton per square meter
bar: a unit of pressure equal to a million dynes per square centimeter
psi: a unit of pressure equal to one pound per square inch
psig: Pressure referenced to ambient air pressure

My definitions:
pascal: N / (cm*10^2)²
psi: Lb. / in²
pisg: a unit of pressure equal to one pound per square inch above atmospheric pressure

I couldn't fine information on these, but I know how they work so I just made a table that anyone can refference to...

1 Bar = 29.529 inHg (inches of Mercury)
1 Bar = 14.5037 psi
1 Bar = 100,000,000 mPa (millipascals)
1 Bar = 100,000 Pa (pascals)
1 Bar = 1,000 hPa (hectopascals)
1 Bar = 100 kPa (kilopascal)

1 Psi = 0.0689475729 Bar
1 Psi = 6,894,757.29 mPa
1 Psi = 6,894.75729 Pa
1 Psi = 68.9475729 hPa
1 Psi = 6.89475729 kPa

1 Pa = 0.000145037738 psi
1 Pa = 1.0 × 10-5 Bar
1 Pa = 1000 mPa
1 Pa = 1 Pa
1 Pa = 1/100 hPa
1 Pa = 1/1000 kPa
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Unread postAuthor: Brian the brain » Thu Aug 03, 2006 6:11 am

Any luck on the piston yet?
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Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: killagorrila99 » Fri Aug 04, 2006 12:18 am

yep it works great
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Unread postAuthor: Brian the brain » Fri Aug 04, 2006 5:21 am

Pictures maybe?? and some damage shots aswell??
I have an interest in this gun because you used the material and kind of pressures I would have liked to use.I would like to know how it turned out.
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: killagorrila99 » Fri Aug 04, 2006 5:28 am

ok pics soon and as of damage it shot a aa battery over a lake and get this . half a kilometre. wow and plus its pretty fricken loud AND i am also using a bigger chamber (1 inch galvonised)
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Unread postAuthor: MrCrowley » Fri Aug 04, 2006 5:48 am

where abouts you live gorrila?my GB gun is predicted on GGDT to shoot 353m but give or take a bit as the piston stuff i filled in is not final yet
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Unread postAuthor: killagorrila99 » Fri Aug 04, 2006 5:55 am

i live in australia and spudguns are illegal here :? but anyway i need help with my bb gatling gun (the one with revolving barrels) so any input would be apreciated http://www.spudfiles.com/forums/viewtop ... 352&#28352
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