First Compressed gas Cannon (rather technical)
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SpudBlaster15
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Last edited by SpudBlaster15 on Wed Jul 14, 2021 1:34 pm, edited 1 time in total.
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boilingleadbath
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The pressure of propane is highly temperature dependent - but normally is far south of 300 PSI. (I think the emergency release valves on those tanks generally activate at around that pressure)
http://www.engineeringtoolbox.com/propa ... _1020.html
They do have a point, though - propane is more expensive per shot.
(I'm calculating .2$ per 2 liter chamber at 100 PSI)
That said, it looks like you want a fair degree of velocity consistency... so you want something less manual than a ball valve.
I advise you to download and play around with the GGDT... with the acknowledgment that it doesn't have propane as a gas option.
(though I think joanna posted the data needed to enter it as a custom gas on spudtech)
http://www.engineeringtoolbox.com/propa ... _1020.html
They do have a point, though - propane is more expensive per shot.
(I'm calculating .2$ per 2 liter chamber at 100 PSI)
That said, it looks like you want a fair degree of velocity consistency... so you want something less manual than a ball valve.
I advise you to download and play around with the GGDT... with the acknowledgment that it doesn't have propane as a gas option.
(though I think joanna posted the data needed to enter it as a custom gas on spudtech)
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schmanman
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well, unless you have the valve and chamber to support it.MrCrowley wrote:I doubt you could get 250fps with a 20" barrel easily.
If you do, you can achieve high velocities pretty easily.
does anyone know what airsoft thingy he was talking about?
Persistence is a measure of faith in yourself
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jrrdw
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Don't take these guys flaming you to hart. Your just new to spudding? Pay more attenchion to Mr Crowley's post, for your sizes. Go to the spud wiki and read up on pneumatic cannons and solvent welding before you start building, the link is up top. We do like pictures around here and video's are even better, of your cannon's, just wanted to point that out. Welcome to spudfiles.
