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Backpack Cannon V2

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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Backpack Cannon V2

Unread postAuthor: deathbyDWV » Tue Jan 19, 2010 6:12 pm

This is a cannon that I improved upon from this...

http://www.spudfiles.com/forums/the-backpack-cannon-t18886.html

The thing on the bottom is a small hand pump... it takes a while to pump up but when i do... it'll shoot a golf ball 150 yards. I was really impressed with the power...

The changes I've made are...

new gb barrel

added a quick connect

put on the pump

painted it...


Image


Image
Hmm...i kinda need a haircut... :?
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Unread postAuthor: irisher » Tue Jan 19, 2010 6:16 pm

put on the pump
I do not see the pump in the photos.
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Unread postAuthor: maverik94 » Tue Jan 19, 2010 6:17 pm

Not bad, Not bad at all!!! 150 yards with a sprinkler valve is pretty impressive. What pressures are you running it at? For your next cannon you should try your hand at a piston valve, you will be impressed with the performance spike. 8)
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Unread postAuthor: Lockednloaded » Tue Jan 19, 2010 6:26 pm

I do not see the pump in the photos.

if you look at his last version you can see the fill valve at the bottom, so i assume that the pump attaches to that and is housed inside the tees.
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Unread postAuthor: deathbyDWV » Tue Jan 19, 2010 6:35 pm

Actually... I've already conquered the piston...

http://www.spudfiles.com/forums/4in-coaxial-cannon-updatestand-t18237.html

And I'm about to finish another piston gb cannon...

The pump is hidden inside the elbow, two tees, and another elbow. Connected to the bottom of the cannon...
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Unread postAuthor: maverik94 » Tue Jan 19, 2010 8:52 pm

Actually... I've already conquered the piston...
Ah yes, nice, I forgot about that!
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Give me a lever long enough, and a fulcrum on which to place it and I shall move the world.
–Archimedes
Defeat is always momentary.
–Carl Denham

Current Project: None, I'm in Spudremission.
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Unread postAuthor: irisher » Tue Jan 19, 2010 8:57 pm

The pump is hidden inside the elbow, two tees, and another elbow. Connected to the bottom of the cannon...
Where is the handle?
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Unread postAuthor: veginator » Tue Jan 19, 2010 9:01 pm

Its the elbow closest to the quick disconnect. It doesn't have any epoxy on it.
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Pardon my lack of wit; I've been at nerf haven for a while.
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Unread postAuthor: irisher » Tue Jan 19, 2010 9:03 pm

I understand now. That is pretty clever.
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Unread postAuthor: deathbyDWV » Tue Jan 19, 2010 9:04 pm

The front elbow isn't actually glued on... it is the pump handle. When pushed all the way down it fits to the chamber. I might be able to get up a pic tomorrow. Its dark here right now...

edit... you beat me to it veggie... good job!

:lol: :lol: :lol: veggie :lol: :lol: :lol:
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