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fully auto/ semi auto ...trust me you will like.

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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fully auto/ semi auto ...trust me you will like.

Unread postAuthor: 0458187724 » Thu Jun 23, 2011 6:00 am

well basically i created this design in my head originally as a semi auto and over a few weeks of continuous thought i created a simple way to make it fully automatic....i wasn't going to post it at first because everytime i looked online for "help" to build a good gun with a decent amount of features i kept finding stupid "glove guns" and other guns that i would more consider "launchers" ...especially when every second page or video you visit is the exact same thing as before...so i decided to build one from scratch....but thats enough of me blabbin about that.

features
fully auto/semi auto
magazine built into top of housing
has been designed to be portable
decent size
you can see the bolt slide back and fowarth.
its cool ahaha

anyway have a look at the give..there is no specific plans as i could not be bothered so don't ask but if you do attempt to build it you must consider every detail, espacilly the movement of the bold and were and what every component is doing for the duration of every action.

by the way the give is extremly dodgy but you should get the idea.

give me a rate..thats the main reason i've put it up because from what i've seen so far it is unique.

but don't get me wrong some of the launchers and guns i've seen on here are f*****ing awsome , they just had a few negatives i didn't like.

have fun kiddos.

hhahahahahah and excuse the person that pops up in the give, i made it as a joke when i was showing him, he didn't find offensive so i didn't remove it before i deleted the program .

ive biult a decent amount so far out of alluminium sqaure bar and mild steel round bar.

the main tools i have used are:
milling maching
lathe
taps and dies
various hand tools
drill press
my brain :twisted:

now the first frame is the one were the bolt (black) is hooked over the trigger (green)

the second is were the arrow next to the trigger bends and up the top left a little text box apears saying "rod hits valve"

and third is were the stick man apears haha
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Unread postAuthor: ilovefire » Thu Jun 23, 2011 6:16 am

slightly similar to what i tried to make but failed, but your design looks like it might work, altho i am unsure that you will get very good performance from it, how many psi you plan to run it on?
http://www.spudfiles.com/forums/another ... 22252.html
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why make it if it dosent shoot?
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Unread postAuthor: 0458187724 » Thu Jun 23, 2011 6:47 am

and sorry to answer your question of the pressure. the semi auto had a much smaller bolt diameter about 10 mm, this one is 19 mm so the air take sroughly twice as long to fill the housing bore. this also has to travel 30 mm, the original "semi auto prototype" only had to travel about 10 mm, because it didn't start in the middle, then travel rearwards, then blow-foward. it only had to travel fowards.

any way bla bla bla on this deign the "functioning" pressure is 60 - 120 psi. ( i cant get any higher, although the wall thickness of the housing and rigidity of components would deffently allow me to.

the old semi auto i dismantled could easily function (well but not all to power-fully) at 30 psi.

and by function, i mean ; take its full blow foward action and succsecfuly dump all the air.


edit:

i think thats how you do it im only new....

my and your design differs becuase in mine the air pushes the bolt to a set point..(in this case 3 centimetres ) and once its reached the 3 centimetres the o-rings pass a hole wich alows all the air behind the bolt around it and back down the center of the bolt wich leads directly behind the bb.

eg: if i hooked up a qiuck release valve directly (without any extra components) to a barrel and put a bb in it and pressed and release the valve very qiuckly all of the air or gass ends up behind the bb.

in this design it is exactly the same except i have design a specific path for the air or gas to follow to cause a few actions and movments between the valve bieng activated to the air or gas coming into contact with the bb.

basicly the compresed air is even at 10 psi, more powerfull than the spring, so the bolt will not retract until all the pressure previously behind it is infront of it.

i have done some tests on the strictly semi auto desing back in the day runiing at 90 psi with 4.5mm bbs and the easily penetrated both sides of a coke can. the range was also extremly good considering the barrel was way to big diameter wise, and it was made from thing coppoer tubing that i had to "straighten" myself with a hammer...

but i like your desing because you have basicly design your own quick release valve and biult the rest of the gun around it. i honestly can not see why yours would not be effective and powerfull.
maybe you could try tweaking it and playing around with it ?
i would love to see a video of it functioning.

sorry about the spelling..facebooks getting to me :o
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Unread postAuthor: ilovefire » Thu Jun 23, 2011 7:24 am

sorry but i dont think i could understand most of your post, so you have started to make it? if so some pictures would be nice, and and there was a vid of the valve on the second page, but because of the constan flow it was going to fast, could have possibly worked with a lot of tweaking but i had lost interest and didnt have the funds/equipment to make it properly
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why make it if it dosent shoot?
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Unread postAuthor: POLAND_SPUD » Thu Jun 23, 2011 2:47 pm

Don't worry, it isn't very original... ;-)
It will work.... as some PB guns are build exactly in the same way
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Unread postAuthor: 0458187724 » Thu Jun 23, 2011 7:58 pm

ok, i will post pictures and maybe a lil vid. im still tweaking the valve so at the moment it will only be semi auto . but still interesting as the bold can be seeing whiping back and fowarth.

and what is "pb" ??
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Unread postAuthor: POLAND_SPUD » Thu Jun 23, 2011 8:21 pm

and what is "pb" ??

Paintball


some PB guns are build exactly in the same way


Image

Image

http://www.zdspb.com/tech/misc/anim_hammer.html
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Last edited by POLAND_SPUD on Thu Jun 23, 2011 8:27 pm, edited 1 time in total.
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Unread postAuthor: 0458187724 » Thu Jun 23, 2011 8:27 pm

yeah, i did have a look at this design multiple times and even started working out a way to biuld it. the main reason i didnt is because i dont like the gravity fed mag.

and when i originally design mine i intened on it bieng fully auto/ semi auto. hold the trigger down and itll keep firing sort of thing.
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Unread postAuthor: ramses » Thu Jun 23, 2011 9:45 pm

Would you need a disconnector to avoid full-auto fire?
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Unread postAuthor: 0458187724 » Fri Jun 24, 2011 10:58 pm

im not sure what a disconector is but when i first biult the prototype a few years ago, it was intented as semi and full auto, depending on whether you held the triger or not. i was using a valve as the trigger but when i tried full auto the bolt just stayed fowards. so it only worked out as a semi.

thats why i rediesigned it and made the triger out of metal plate instead. you pull the triger, the bolt is released backwards along with the "rod" sticking out of the top, and the "rod" hits the valve forcing air behind the piston or "bolt" and pushes it foward. the bolt then continiues foward until it reaches the holes and the air then passes through the holes and into the holes in the bolt that leads down to were the bb sits. once the bb is fired there is no longer air behind the bolt and the springs eather force the bolt back and the triger catches the bolt or, if the triger is still held down, the bolt is forced all the way back to the valve and the cycle is repeated.
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Unread postAuthor: Zeus » Fri Jun 24, 2011 11:10 pm

A disconnector lets the sear return to the position that holds the bolt back. It's used to allow semi automatic fire with a bolt that has a fixed firing pin.

Also, I really don't recommend having your phone number as a username, it's not a good idea, we have the occasional troll. And it tells people which country you live in too.
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Unread postAuthor: 0458187724 » Fri Jun 24, 2011 11:22 pm

yeah i realised that after i made it but i cant change it. do you know how?

and im still a lil fuzzy on the disconector?

basicly with this design if you hold the trigger down it will continuously fire. if you tap the triger down and release it it will be semi.

cheers
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Unread postAuthor: Zeus » Fri Jun 24, 2011 11:38 pm

http://www.homegunsmith.com/cgi-bin/ib3/ikonboard.cgi?s=4b22635baa69aa242a8519fe5812c56a;act=ST;f=30;t=8314;st=30

Scroll down until you see the first photo, the part that's actuated by the trigger is a sear.

You see how as soon as the trigger is pulled, it returns to it's original position even though the trigger is pulled.

If someone as a better description, please post it, my search skills are non-existent today.

Also, PM PCGUY if you want to change your name, he should understand why. It will take a few days though.
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Unread postAuthor: 0458187724 » Sat Jun 25, 2011 12:55 am

ahh ok, well no i am not using a sear or disconnector. i thought about a design involving similar parts. but when it came to the trigger i just gave up on any "advanced" sort of design. and just hoped the single piece trigger would perform well enough and be easy enough to pull.

either way the valve i am using isn't fucntioning with the gun they way i pictured it. so the trigger will be the valve at the moment, even though this will mean its only going to be semi automatic at the moment, atleast until i figure something out.

but another interesting thing is, at a certain pressure and if i hold the valve down just right the bolt shoots back and fowarth anyway, i was thinking of scrapping the rest and using this to be my fully auto control. but since it only happens in the right conditions and it would be hard to figure out were to put the magazine intake hole, i decided to just go with what i new for sure would work.

the reason i am guessing this is happening is at around 80-90 psi the chamber behind the o-rings clears fast enough for the bolt to cover the holes again but also refills in time to stop the bolt from completing its full rearward moton. when this happens i get about 20 mm of travel out of the bolt. wich in this design is more than enough to make use of.
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Unread postAuthor: cammyd32 » Sat Jun 25, 2011 4:44 pm

Good design there, I wish you luck in creating it!
the only problem you may encounter is that you need a very high psi to make it run efficiently. :D

PS I like the subliminal messaging in your animation, the first thing I will do tommorow is go out and shoot a stick man called James with a bb gun. :lol:
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