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blow forward bolt
Posted: Mon Feb 16, 2009 10:32 am
by suture self
ok, this one has probably been done before so go easy on me if so, i would like to build this one if you guys think it would work let me know if you see anything wrong with it, other than the cheesy stock i added in paint
Posted: Mon Feb 16, 2009 10:49 am
by jackssmirkingrevenge
The "bolt return line" is a waste of air, why not just use a spring?
Posted: Mon Feb 16, 2009 10:50 am
by john bunsenburner
Your diagram is a little unclear, leave out color when its not nessasary...
Posted: Mon Feb 16, 2009 12:33 pm
by SpudsMcGee
Posted: Mon Feb 16, 2009 1:48 pm
by suture self
JSR, shoulda mentioned but i'm going for full auto do you think this would cycle?
maybe i should just scrap the idea, i know how everyone fells about spoonfeeding
but maybe you could just save me some prototyping and point me in the direction of a good auto bolt design ::worthy::
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Posted: Mon Feb 16, 2009 3:11 pm
by jackssmirkingrevenge
suture self wrote:maybe you could just save me some prototyping and point me in the direction of a good auto bolt design
The blow forward bolt can be made to cycle alone, have a look at
this - but in my experience, this happens at a cycling rate so high that feeding ammunition is practcally impossible, not to mention the fiddliness of tuning the system. The bolt has to be combined with some sort of valve which "pulses" the air supply in order to be successful.
From what I've seen, the way this can be achieved without including some sort of externally powered electric/mechanical system is either using a
pop-off piloted piston, or a
pop-off valve directly, looks like you have some more research to do
