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P. 2 Very Simple airgun1!

Built a BB Machine Gun? 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: twill3rs » Sat Nov 01, 2008 4:11 am

ahh, there's a second tube, sorry
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Unread postAuthor: Antonio » Sun Nov 02, 2008 2:00 pm

Young wrote:I like the trigger system, Simple and effective. I cant wait to see when you design a magazine system.


I already made an airgun like this with magazine ontop, you should check this post out:
http://www.spudfiles.com/forums/p-4-bb-airsoft-gun-280miles-h-with-a-new-body-t12216.html
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Unread postAuthor: twill3rs » Sun Dec 21, 2008 5:34 am

hey i have just made the hammer valve inside a plastic bottle cap, with marble instead of ball bearing. It seals great even with very weak spring because of homemade o-ring in the cap instead of silicone tubing. The o-ring is made of silicone bathroom sealant. It is all good and holds alot of pressure but when the barrel inside the metal tube hits the marble to let air out , not a lot comes out. This is because of the air pressure against the marble. What should i do?
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Unread postAuthor: cheeseboy » Sun Dec 21, 2008 5:38 am

If you want less, but more powerful shots you just increase the power of the rubber bands/springs that pull the barrel back, this pushes the marble back with more force allowing more air to escape before the valve seals again.
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Unread postAuthor: Antonio » Sun Dec 21, 2008 6:30 am

cheeseboy wrote:If you want less, but more powerful shots you just increase the power of the rubber bands/springs that pull the barrel back, this pushes the marble back with more force allowing more air to escape before the valve seals again.


Yeah that is a way of making it shoot more powerfull(use more air), another way is to increase the mass of the hammer(barrel). Energy=0.5mv^2=
Elastic energy"=0.5kx^2 so increasing the k(spring constant) or increasing the distance that the barrel travels before it hits the valve or you increase the mass(m) as I said.
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