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Refilling

A place to ask general spud cannon related questions.
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Refilling

Unread postAuthor: Cronic » Fri Nov 25, 2005 2:18 pm

I have one nooby question that I haven't really figured out. When you fill your chamber on a pneumatic gun. You get only one shot from it, right? Or could you attach another container to that with has air pressured at higher pressure so that you get from 210 psi like 3 shots with 70 psi. Please explain.
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Unread postAuthor: boilingleadbath » Fri Nov 25, 2005 6:31 pm

"you only get one shot from it" ...it depends appon valve type.
Some valves (especial hammer valves) can open for very short amounts of time, allowing you to get multiple shots per filled chamber. The same thing has been done with sprinkler valves, and I know of one piston cannon that would automaticaly close the valve once the projectile left the barrel... but I forget how it worked. (I'v been having trouble tracking down the first one [think it shot marbles] and the second is in the spudtech "finished cannons" section.

Typicaly, we don't put "filling chamber" on our cannons - High pressure air scorces are not typical, and these chambers would be bulky and (compared to not existing) relitivly expensive. I did help someone out with a simmilar concept... a couple months ago - suggested using a larger chamber filled with air, regulate this air down to the target pressure. (this was on the spudfiles forums if you want to search for it.) He wanted to be able to shoot multiple shots before returning to his air scource.

It'd also be possible to make a launcher with multiple chambers, sharing a single valve and barrel. This concept has been explored in by <checks spudchat log files> themikeyo14's multi-chamber affair. (again, on this forum)

...but typicaly, yes, they are one shot affairs.
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Unread postAuthor: Cronic » Sat Nov 26, 2005 6:38 am

Thank you clearing that out it help alot.
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Unread postAuthor: Shandora » Sat Nov 26, 2005 11:35 am

hey i use amarbel in the chamber wheni fire it stops the arir flow you get 5 hshots of egual distance with 120 psi
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Unread postAuthor: boilingleadbath » Sat Nov 26, 2005 2:26 pm

Sandora, how are you acheiving that by putting a parasitic vine in your chamber? I'm really having trouble figuring out how that's working.
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Unread postAuthor: longshot1068 » Sat Nov 26, 2005 6:09 pm

LOL, I dont think he's figured out your wit.
and I dont fully grasp how a Marble helps either.

*forums should come equiped with spellcheck, lol*
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Unread postAuthor: Shandora » Sat Nov 26, 2005 6:18 pm

no kidding lol
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Unread postAuthor: TatorBomber » Sun Nov 27, 2005 3:08 pm

HAHAHAHAHA

Clever
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Unread postAuthor: Cronic » Sun Nov 27, 2005 4:58 pm

It helps in a way that when the air starts to flow the marble clogs the exit hole, in the meantime some of the air gets out and the the process is repeted.
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Unread postAuthor: longshot1068 » Sun Nov 27, 2005 5:15 pm

OH! gotcha. I can be a wingnut sometimes- plz forgive me.
Thats a pretty clever way to do that, as long as the breech is small enough that the marble doesnt eventually get forced through into the barrel when fired- could get ugly down range for the poor unsuspecting target.
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Unread postAuthor: pyromanic13 » Sat Dec 03, 2005 8:14 pm

ive got an idea......... ok so you've all seen advanced spuds, I think cam lever breach loader mod, well how about you have separet chambers with the camlevers and one of those big pvc valves that you push down to let the air out and have the other cam lever part and some thing to push the valve domn on the actual chamber so that you could have multible shoot with out haveing to re pressurise. sorry if Im un clear . I know how to build stuff not explain it. ask any questions if you confused I'm thinking about persueing this idea.
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