Incredibly awesome old school super pneumatic
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Justin Sane
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Hello everyone I am attempting to recreate something I just stumbled upon because I want one and don't have $4k to just buy one it is called the select fire capsule launcher or the Sweeney Spfx gun I have seen only a few videos and have found it to be even more difficult to find a lot of good pics anyhow this is what I found maybe some of you could help with determining the parts Or maybe not but I think it's worth a shot there are three types of items like this I am on a quest to make the next one is a boston paintball reflex kit or response trigger autococker also not planning to fire paintballs out of any of these if I can get them figured out thanks for you time and any help you all can be here are some pics also note I am pretty decent at 3D modeling so with help I can draw up a prototype thanks again
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jackssmirkingrevenge
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Very interesting, had never heard of this one!
[youtube][/youtube]
I only skimmed through the video but it appears to be a Girandoni type sliding breech powered by an air ram that simultaneously pilots a main valve when it's in battery. It should not be too difficult to replicate with existing parts, but if you use industrial components it's not going to be cheap.
[youtube][/youtube]
I only skimmed through the video but it appears to be a Girandoni type sliding breech powered by an air ram that simultaneously pilots a main valve when it's in battery. It should not be too difficult to replicate with existing parts, but if you use industrial components it's not going to be cheap.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Justin Sane
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- Joined: Wed Aug 27, 2014 7:29 pm
I like to use clippard parts there very reasonably priced and work great I may even ask them if the have an idea on the pneumatic circuit any diagrams you could draw I understand the concept some what
Very nifty unit.
Circuit wise it's quite trivial. Trigger puts air into a pneumatic cylinder, which moves the bolt across into the valve behind the barrel. That valve pilots the main valve and off goes the projectile. On releasing the trigger, air is removed from behind the pneumatic cylinder (or it's double acting) and simultaneously refills the firing chamber. I think. The problem though is, your lock time is greatly increased, however you always know it's fully in battery when fired.
Myself, I'd be inclined to do it oppositely. The chamber is connected to the cylinder, as the chamber fills, it pushes the bolt into battery. Pulling the trigger pilots the main valve, you'd use a flow control valve and a check valve to slow the pneumatic cylinder retracting. The problem with this setup, a lot more tinkering with flow control valves to get it running reliably, you'd also need to not immediately release the trigger on firing. However it becomes far more simple.
Do correct me, but I think there is a piston in the magazine, either continuously connected to air or just via the chamber, to act as a spring. Very nifty idea, though retracting it would be interesting. In addition, without the main valve being triggered by the bolt, you'd be able to rotate the whole thing 90 degrees, that way it's far less awkward with the huge projection and off centre sights. That said I come from the land that invented the Owen gun and F1, so off centre sights are sort of our thing.
Circuit wise it's quite trivial. Trigger puts air into a pneumatic cylinder, which moves the bolt across into the valve behind the barrel. That valve pilots the main valve and off goes the projectile. On releasing the trigger, air is removed from behind the pneumatic cylinder (or it's double acting) and simultaneously refills the firing chamber. I think. The problem though is, your lock time is greatly increased, however you always know it's fully in battery when fired.
Myself, I'd be inclined to do it oppositely. The chamber is connected to the cylinder, as the chamber fills, it pushes the bolt into battery. Pulling the trigger pilots the main valve, you'd use a flow control valve and a check valve to slow the pneumatic cylinder retracting. The problem with this setup, a lot more tinkering with flow control valves to get it running reliably, you'd also need to not immediately release the trigger on firing. However it becomes far more simple.
Do correct me, but I think there is a piston in the magazine, either continuously connected to air or just via the chamber, to act as a spring. Very nifty idea, though retracting it would be interesting. In addition, without the main valve being triggered by the bolt, you'd be able to rotate the whole thing 90 degrees, that way it's far less awkward with the huge projection and off centre sights. That said I come from the land that invented the Owen gun and F1, so off centre sights are sort of our thing.
/sarcasm, /hyperbole