Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 74 users online :: 4 registered, 0 hidden and 70 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Semi Automatic Loading System

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.
Sponsored 
  • Author
    Message

Semi Automatic Loading System

Unread postAuthor: sl33k » Wed Oct 14, 2009 4:10 pm

Hey guys, well I am very new to spud guns but at the moment I am making a gun that is based on the m40a3 sniper rifle.
I have run into a problem in design I would love to make my gun semi automatic except I cannot find a tutorial anywhere to help me, so if you guys can help I would be VERY grateful.
I can understand I don't have much respect on this forum but all help will be appreciated

thanks in advance
-Paul
  • 0

Last edited by sl33k on Wed Oct 14, 2009 4:19 pm, edited 1 time in total.
User avatar
sl33k
Private
Private
 
Posts: 16
Joined: Tue Oct 13, 2009 3:30 am
Reputation: 0

Unread postAuthor: jor2daje » Wed Oct 14, 2009 4:14 pm

Jsr. has good blow forward bolt design you could probably use, I have made one for .177 bbs and it works well. What calibre is your rifle going to be.
  • 0

Patience is a virtue, get it if you can, seldom in a women, never in a man.
User avatar
jor2daje
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 418
Joined: Sun Oct 05, 2008 9:41 pm
Location: Southern California
Reputation: 0

Unread postAuthor: sl33k » Wed Oct 14, 2009 4:20 pm

Ah I am looking at .22 but if I can get a good loading system i can always change, actually now that i think about it .177 would probably be better...

also what is JSR? it is probably obvious but I'm new
  • 0

Trying to be innovative.
User avatar
sl33k
Private
Private
 
Posts: 16
Joined: Tue Oct 13, 2009 3:30 am
Reputation: 0

Unread postAuthor: kjjohn » Wed Oct 14, 2009 5:27 pm

If you don't want to deal with a pressure powered bolt/reloading mechanism, you can wire up a solenoid that could pull open and close the bolt with the push of a button or with some more complicated circuitry, completely semi-auto. I am using this method on a new cannon I am building.
  • 0

User avatar
kjjohn
1st Lieutenant
1st Lieutenant
 
Posts: 270
Joined: Sat Jul 11, 2009 3:54 pm
Reputation: 0

Unread postAuthor: jeepkahn » Wed Oct 14, 2009 5:41 pm

sl33k wrote:also what is JSR? it is probably obvious but I'm new


JSR is a mythical creature who lives in an epoxy cave spending countless hours in an epoxyfume and alcohol induced stupor daydreaming of winning the nobel peace prize for his creation of a full auto blow forward bolt APFSDS firing antitank pistol that's only a 4mm bore and constructed entirely of 2 part epoxies...
  • 0

My Cannons can be found by clicking the following link.
http://www.spudfiles.com/forums/viewtop ... tml#256896

jeepkahn
Colonel
Colonel
 
Posts: 747
Joined: Fri Jan 09, 2009 1:11 pm
Location: Triad, NC, USA
Reputation: 0

Unread postAuthor: sl33k » Wed Oct 14, 2009 6:20 pm

kjjohn wrote:If you don't want to deal with a pressure powered bolt/reloading mechanism, you can wire up a solenoid that could pull open and close the bolt with the push of a button or with some more complicated circuitry, completely semi-auto. I am using this method on a new cannon I am building.


How complicated would this be? Because I dont want to have to wire something that i cant change later
  • 0

Trying to be innovative.
User avatar
sl33k
Private
Private
 
Posts: 16
Joined: Tue Oct 13, 2009 3:30 am
Reputation: 0

Unread postAuthor: jor2daje » Wed Oct 14, 2009 7:11 pm

haha jsr is short for jackssmirkingrevenge, he is a builder somewhere in europe who normally builds small scale one off prototypes made almost entirely of epoxy. here is one of his protypes that uses a blowforward bolt, you could use his diagrams and apply them to your own skills and materials.
  • 0

Patience is a virtue, get it if you can, seldom in a women, never in a man.
User avatar
jor2daje
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 418
Joined: Sun Oct 05, 2008 9:41 pm
Location: Southern California
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: sl33k » Wed Oct 14, 2009 11:20 pm

haha yea thanks man, I will have a look at this when i get home
  • 0

Trying to be innovative.
User avatar
sl33k
Private
Private
 
Posts: 16
Joined: Tue Oct 13, 2009 3:30 am
Reputation: 0

Unread postAuthor: rikukiakuchiki777 » Thu Oct 15, 2009 1:23 am

One of my personal favourite semi-auto constructions on this website is this. Another impressive semi-automatic gun is this one. While the concepts are relatively simple, for your first pneumatic it should be quite difficult without adequate tools and experience. I learn't this the hard way :roll:. I would recommend starting small and just building up to the semi-auto league - but if your up for it, go right ahead and try :D
  • 0

User avatar
rikukiakuchiki777
Staff Sergeant
Staff Sergeant
 
Posts: 110
Joined: Wed Feb 11, 2009 1:00 am
Location: Australia
Reputation: 0

Unread postAuthor: sl33k » Thu Oct 15, 2009 2:03 am

yea i am the type to persist, man this looks rather complicated though, and in my designs this would not fit, I will upload some designs tonight and have a look at what we can do. Thanks guys :D
  • 0

Trying to be innovative.
User avatar
sl33k
Private
Private
 
Posts: 16
Joined: Tue Oct 13, 2009 3:30 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Thu Oct 15, 2009 7:10 am

jeepkahn wrote:JSR is a mythical creature who lives in an epoxy cave spending countless hours in an epoxyfume and alcohol induced stupor daydreaming of winning the nobel peace prize for his creation of a full auto blow forward bolt APFSDS firing antitank pistol that's only a 4mm bore and constructed entirely of 2 part epoxies...


Would you like to write my autobiography :D here is a rare picture of the beast:

Image
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: sl33k » Thu Oct 15, 2009 3:59 pm

hahaha the man himself, sketches will be up soon
  • 0

Trying to be innovative.
User avatar
sl33k
Private
Private
 
Posts: 16
Joined: Tue Oct 13, 2009 3:30 am
Reputation: 0

Re: Semi Automatic Loading System

Unread postAuthor: Mr.Sandman » Thu Oct 15, 2009 6:10 pm

sl33k wrote:Hey guys, well I am very new to spud guns but at the moment I am making a gun that is based on the m40a3 sniper rifle.
I have run into a problem in design I would love to make my gun semi automatic except I cannot find a tutorial anywhere to help me, so if you guys can help I would be VERY grateful.
I can understand I don't have much respect on this forum but all help will be appreciated

thanks in advance
-Paul
Do i smell cod4? Dont go blow forward use a blowback design. its on wiki IIRC.
  • 0

Yeah, it's that important.
User avatar
Mr.Sandman
Donating Member
Donating Member
 
Posts: 762
Joined: Fri Mar 28, 2008 9:10 am
Country: Antarctica (aq)
Reputation: 0

Unread postAuthor: sl33k » Thu Oct 15, 2009 7:39 pm

maybe... nah i am going for a different rilfe now because it was going to be to difficult to fit everthing in it.
  • 0

Trying to be innovative.
User avatar
sl33k
Private
Private
 
Posts: 16
Joined: Tue Oct 13, 2009 3:30 am
Reputation: 0

Unread postAuthor: sl33k » Fri Oct 16, 2009 3:57 am

Sorry for the double post but here is the design i am looking at I know its basic thats because i did it on the computer... my sketches are tons better any way without further ado here it is.
Image
  • 0

Trying to be innovative.
User avatar
sl33k
Private
Private
 
Posts: 16
Joined: Tue Oct 13, 2009 3:30 am
Reputation: 0

Next

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Yahoo [Bot]

Reputation System ©'