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Doubt about recoil

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Doubt about recoil

Unread postAuthor: apocavorme » Sat Nov 10, 2012 7:40 am

hello to all,
i m building a semi auto and the reload system will be like picture 1;
the question is: will it add a vertical recoil to the gun?
if i put a simple hopper like in picture 2, will be less recoil?
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Unread postAuthor: jackssmirkingrevenge » Sat Nov 10, 2012 8:32 am

Recoil is not something which would be an issue for a small calibre pneumatic.
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Unread postAuthor: apocavorme » Sat Nov 10, 2012 9:18 am

even if it is 500psi, 50ml chamber? .50 ammo
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Unread postAuthor: jackssmirkingrevenge » Sat Nov 10, 2012 9:30 am

[youtube]http://www.youtube.com/watch?v=ge7IQHYprj4[/youtube]

Hardly a flinch.
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Unread postAuthor: sagthegreat » Sat Nov 10, 2012 2:54 pm

I mean if you want recoil then you can try this?
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Unread postAuthor: Zeus » Sat Nov 10, 2012 3:39 pm

I recommend you work out how to calculate recoil, then consider anything under 30ft/lb of recoil is easy to handle, 30-50ft/lb gets a bit hard on your shoulder, 50-80ft/lb is uncomfortable to quite painful, and upwards of 80ft/lb is starting to get dangerous.

MrCrowleys' Mjolnir has around 80ft/lb of free recoil energy. Any pneumatic won't get close. Also, impulse time is another factor, a pneumatic throwing 4oz of lead at 600fps will have less felt recoil that a shotgun pushing 1 1/8oz at 1250fps.

Basically, don't worry about it.
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/sarcasm, /hyperbole
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