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another semi-auto idea!?

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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another semi-auto idea!?

Unread postAuthor: ilovefire » Fri Jan 21, 2011 4:40 am

iv always wanted to make a semi and am always trying to think of an idea that i like for when i have the money to make it, this is another one of my ideas that iv had, would use regulated co2 and would be 5mm bore, i think the drawings should be self explanatory if not ask away, what do you guys think?
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Re: another semi-auto idea!?

Unread postAuthor: jackssmirkingrevenge » Fri Jan 21, 2011 5:29 am

ilovefire wrote:what do you guys think?


Too complicated :) I like the sliding block idea though :D
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Re: another semi-auto idea!?

Unread postAuthor: ilovefire » Fri Jan 21, 2011 5:45 am

jackssmirkingrevenge wrote:Too complicated :)


must admit it is a bit, can you see it functioning very well IF i did some day decide to make it?

jackssmirkingrevenge wrote:I like the sliding block idea though :D


personally i dont know if i see that working very smoothly or without any leaks, but i could be wrong, wouldnt be the first time :roll:
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Unread postAuthor: jackssmirkingrevenge » Fri Jan 21, 2011 5:57 am

ilovefire wrote:must admit it is a bit, can you see it functioning very well IF i did some day decide to make it?


It would probably work, but I don't see the point of having a sliding block and a blow forward bolt, either will suffice on its own.

personally i dont know if i see that working very smoothly or without any leaks, but i could be wrong, wouldnt be the first time :roll:


In this case you're right, one of the reasons I never made anything similar.
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Unread postAuthor: ilovefire » Fri Jan 21, 2011 6:03 am

jackssmirkingrevenge wrote:It would probably work, but I don't see the point of having a sliding block and a blow forward bolt, either will suffice on its own.


how could i have it so that i can have a horizontal mag with just the blow forward bolt?
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Unread postAuthor: jackssmirkingrevenge » Fri Jan 21, 2011 6:38 am

ilovefire wrote:how could i have it so that i can have a horizontal mag with just the blow forward bolt?


er...
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Unread postAuthor: ilovefire » Fri Jan 21, 2011 6:53 am

yea i guess that was a bit of a stupid question, and this might be to but how would you stop the bbs falling out the barrel and double feeds and and that stuff...
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Unread postAuthor: jackssmirkingrevenge » Fri Jan 21, 2011 7:23 am

ilovefire wrote:how would you stop the bbs falling out the barrel and double feeds and and that stuff...


detent?
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Unread postAuthor: ilovefire » Fri Jan 21, 2011 7:39 am

now your just making me sound stupid :( what i actually want to know is which sort of detent would i use that wouldnt f**k with or get f**ked by the blow forward bolt? at the sam time as allowing the blot to travel far enough forwards that it would seal the mag, O-ring detent is probably out of the question because i dont tend to make things very serviceable and i dont want anything that would add to much bulk or strange looking things to the gun (i like aesthetics just as much as i like power and consistency) thats also why im not sure about a ball detent because then i would have to have this thing sticking out the top or side of the gun and i dont really like that, not really sure what other detents i could use unless i just use a strong magnet which would then limit it to steel bbs, you get my drift?
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Unread postAuthor: Crna Legija » Fri Jan 21, 2011 8:15 am

well if you make the bolt just big enough to hit a oring and use the same oring as your detent and it would seal air from the mag and stop rolling out issue
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Unread postAuthor: jackssmirkingrevenge » Fri Jan 21, 2011 9:25 am

Agreed with -_- above.

On a slightly different note, I always wanted to combine the blow-forward bolt with the "valveless" design for reliable (one shot per trigger pull) semi-auto, in my head it looks something like this:
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Unread postAuthor: ilovefire » Fri Jan 21, 2011 5:37 pm

if i do in fact make this i am planing on getting a co2 bottle a regging it down to 600psi or more so not have the mag sealed will be a problem, i think i might go for the horizontal mag and blow forward bolt idea and between now and when i do have the money to make it ill start looking for things i can use that will take the pressure and still be serviceable, if i can find a threaded fitting small enough i might go for the O-ring detent, i would still like to hear any other suggestions, and also has anyone made this type of blow forward blot in a similar caliber on this site before?
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Unread postAuthor: ilovefire » Sun Jan 23, 2011 7:24 am

iv got another question, would using the blow forward bolt result in full-auto? as cool as that would be i dont think i could afford to have something blow through the the ammo that quickly, any ideas on this plus could i expect much power from a blow forward bolt? thanks
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Unread postAuthor: ilovefire » Thu Jan 27, 2011 3:12 am

i made the blow forward bolt today did a little bit of testing and with 90psi from the compresor it was more like full-auto until the bolt broke a little bit probably because i didn't let it set long enough, any way got a couple of pics
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Unread postAuthor: jackssmirkingrevenge » Thu Jan 27, 2011 3:19 am

Did it cycle like mad or not work at all?

That's the effect I had here, slightly different design but same concept.

Beautifully made by the way :)
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