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[chrissilvermancs]

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[frankrede]

A better example than my work

The above example could be easily modified to full auto by using a pop-off valve for a pilot valve.

The cannon jack posted (images are dead) simply uses a Q.E.V. with a pop-off pilot, and an air source. I used a 90 PSI pop-off to reduce air consumption, but it really depends on what type of compressor you have.

The ROF is controlled most effectively with this design by the flow of air into the cannon, so your trigger valve (NOT pilot valve, the fill valve) should be chosen carefully. A flow regulator could be added as well.

As to the ammo feeding, the paddle system linked in this and jack's post or a simple blow-forward bolt will work. The reason you haven't seen "a single auto design shooting larger than a BB work" is simply because you haven't looked hard enough. GalFisk made one that shot airsoft pellets.

Also, if you're referring to BB machine guns in your first post, have a look in the wiki at "Vogt Pattern" guns. DR made one that shot tennis balls, and another one that shot golf balls.

EDIT: here's another example of the "paddle" system. This is the one built by DR (BewareOfDog) that shoots golfballs. Again, a simple sprinkler pilot will allow this cannon to fire full-auto, but in this case you'd be going for as much fill-flow as possible... air consumption is pretty heavy.

Video of DR's S.A. GB Gun

I am in possession of that semi-auto feeder, I still need a project to use it in.

[chrissilvermancs]

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