GGDT request, please
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normally i don't play with pneumatics, but i have an overabundance of .451 lead balls that i use with my 1858 Remington cap and ball pistol. i'm thinking i will try my hand at a barrel sealer. actually two, one will be pistol and the other a long rifle(minus rifling).
i run linux so i'm not able to natively run GGDT. i also borked my python so CALM won't run either. i was wondering if someone could run some info through GGDT for me.
pistol:
300 psi
chamber: 12"x1" sch40 PVC (10.39 cu.in)
barrel: 12"x3/8" sch40 PVC (.483" dia.)
rifle:
400 psi
chamber: 48"x1" sch40 PVC (41.56 cu.in)
barrel: 108"x3/8" sch40 PVC (.483" dia.)
projectile:
patched .451 lead ball (.480" dia.)
weight: 8.87745 grams
less than 5 psi of friction
valve will be in a 1" tee and hopefully piloted by a modified blowgun
the 1858 remington shoots around 550-720 ft/s with an 8" barrel, 5-6 ft/lbs of recoil, and 200 ft/lbs of muzzle energy
Thanks
i run linux so i'm not able to natively run GGDT. i also borked my python so CALM won't run either. i was wondering if someone could run some info through GGDT for me.
pistol:
300 psi
chamber: 12"x1" sch40 PVC (10.39 cu.in)
barrel: 12"x3/8" sch40 PVC (.483" dia.)
rifle:
400 psi
chamber: 48"x1" sch40 PVC (41.56 cu.in)
barrel: 108"x3/8" sch40 PVC (.483" dia.)
projectile:
patched .451 lead ball (.480" dia.)
weight: 8.87745 grams
less than 5 psi of friction
valve will be in a 1" tee and hopefully piloted by a modified blowgun
the 1858 remington shoots around 550-720 ft/s with an 8" barrel, 5-6 ft/lbs of recoil, and 200 ft/lbs of muzzle energy
Thanks
Last edited by bluerussetboy on Sat Jan 05, 2008 7:29 pm, edited 1 time in total.
You do realise if that the PVC has a defect and fails, you will be completely forked, right?
Before I give any specs, use metal tubing which is rated for the pressure you're using. I know that 1" PVC is rated for it, but it isn't worth the risk.
Before I give any specs, use metal tubing which is rated for the pressure you're using. I know that 1" PVC is rated for it, but it isn't worth the risk.
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
- ALIHISGREAT
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i agree with DYI you should use copper or steel and take it to 500psi+
edit: i wouldn't trust a blowgun past 300psi
edit: i wouldn't trust a blowgun past 300psi
Last edited by ALIHISGREAT on Sat Jan 05, 2008 7:37 pm, edited 1 time in total.
Well, JSR has used pressures like that in small ID PVC. But I wouldn't recommend it at all.
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- ALIHISGREAT
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JSR must be crazy, in europe (as far as i know) we don't have the sch pipe system so the walls of pipe get thinner as the pipe diameter lowers so the highest pressure rating i can get in the uk for pvc is 16bar.DYI wrote:Well, JSR has used pressures like that in small ID PVC. But I wouldn't recommend it at all.
2" SCH 40 welded steel actually has a burst pressure of over 2000 psi, as does 2" type M copper. Copper is great for higher pressure as well, but is rather expensive in larger diameters compared to steel.
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
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considering what 1" PVC is rated for 450psi and the pressures are below the rating. also considering the snowmaking equipment where i work uses the same PVC at the same pressure for extended periods with both water and air, i'm not too worried. thanks for the concern.
and thanks Fnord for the info
and thanks Fnord for the info
- ALIHISGREAT
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well you will have to be carefull with it (more so than with copper or steel) because of cold weather or sunlight and another advantage of copper or steel is that they can be used all year round without any worrybluerussetboy wrote:considering what 1" PVC is rated for 450psi and the pressures are below the rating. also considering the snowmaking equipment where i work uses the same PVC at the same pressure for extended periods with both water and air, i'm not too worried. thanks for the concern.
and thanks Fnord for the info
i barely trust sch40 pvc at 135, no way i would do any more than 150, and even that is pushing it. copper or steel works better and looks better and is a lot safer. use metal pipe if you are doing any more than 150 psi.
"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote
you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
What your snowmaking equipment at work is doing is against building code, and would fail an inspection. PVC is not rated to be used as a compressed gas line unless it is encased in a shrapnel-proof shield.
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.