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 67 users online :: 6 registered, 0 hidden and 61 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

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

The Team
Administrators
Global Moderators
global_moderators.png CS

semi-auto design

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-auto design

Unread postAuthor: ilovefire » Sun Dec 26, 2010 1:24 am

this is a semi-auto design i thought of, not sure if its original or not but hee it is, dont think i will be able to make it because i dont have a lathe and stuff but i just thought i would show it.
what you think?
  • 0

Attachments
11111.jpg
11112.jpg
11113.jpg
black thing above the mag is a magnet
User avatar
ilovefire
Colonel
Colonel
 
Posts: 511
Joined: Sat May 22, 2010 6:48 am
Reputation: 0

Unread postAuthor: LovableAirGuns » Sun Dec 26, 2010 2:41 am

thats a hell smart idea although i dont think you would need a lathe, you could just use PVC or copper or something else
  • 0

User avatar
LovableAirGuns
1st Lieutenant
1st Lieutenant
 
Posts: 267
Joined: Tue Sep 28, 2010 5:58 am
Reputation: 0

Unread postAuthor: ilovefire » Sun Dec 26, 2010 3:56 am

yea thanks, its really just the piston thats the hard part without a lathe
  • 0

User avatar
ilovefire
Colonel
Colonel
 
Posts: 511
Joined: Sat May 22, 2010 6:48 am
Reputation: 0

Unread postAuthor: al-xg » Sun Dec 26, 2010 8:43 am

It is basically a blow forward valve without the blow through aspect, and should work fine.

The detent would have to be closer to the magazine though as it will not prevent double feeding in the current position.

The only problem is the chance of inconsistency from shot to shot in the pressure washer opening time, and therefore in power.

A high pressure solenoid valve could fix this, or a system with an unbalanced pilot system (but piloting would be triggered by more pressure instead of venting, similar to the piloting hybrid piston designs).
But I guess one could just learn to press the trigger down with consistent speed.
  • 0

User avatar
al-xg
Colonel
Colonel
 
Posts: 643
Joined: Fri Jan 19, 2007 12:29 pm
Reputation: 0

Unread postAuthor: ilovefire » Sun Dec 26, 2010 3:15 pm

i was thinking if you use steel bbs you could just use a strong magnet to hold the bbs in place plus with a strong enough spring on the piston the opening time of the pressure washer is not a concern for by the time the pistons opened the pressure washer would be open and with high pressure all you need is the pressure behind the piston to fire it
  • 0

User avatar
ilovefire
Colonel
Colonel
 
Posts: 511
Joined: Sat May 22, 2010 6:48 am
Reputation: 0

Unread postAuthor: Vincenzo » Sun Dec 26, 2010 3:24 pm

I think a BFB design where the air goes through the bolt would be better because in yours there is a lot of dead volume between the valve and the projectile.
  • 0

more_eggs wrote:My teachers hated this one:
Teacher: "Matt, take your iPod out in class"
Me: "beg your pardon sir? I can't hear you, I'm listening to my iPod"
:P
User avatar
Vincenzo
Specialist
Specialist
 
Posts: 58
Joined: Mon Dec 06, 2010 6:50 pm
Reputation: 0

Unread postAuthor: ramses » Sun Dec 26, 2010 3:32 pm

I tend to agree with Vincenzo. The bolt would also be much lighter. Look into Clide's GB semi for a physical prototype (which actually works very well). He also used an awesome main valve.
  • 0

POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name :D
User avatar
ramses
Major General
Major General
 
Posts: 1679
Joined: Thu May 29, 2008 6:50 pm
Reputation: 3

Sponsored

Sponsor
 


Unread postAuthor: ilovefire » Mon Dec 27, 2010 5:32 am

yes i have seen that one before but i was thinking that something that would seal the mag of would make it easier to use high pressure without having to worry about having to seal it and have less issu with duble feeding, also if you get the spring strong enough you could maybe get it full auto? dose anyone know where to find any links of some blow forward bolts?
  • 0

User avatar
ilovefire
Colonel
Colonel
 
Posts: 511
Joined: Sat May 22, 2010 6:48 am
Reputation: 0

Unread postAuthor: Vincenzo » Mon Dec 27, 2010 4:40 pm

Here is Clide's.
  • 0

more_eggs wrote:My teachers hated this one:
Teacher: "Matt, take your iPod out in class"
Me: "beg your pardon sir? I can't hear you, I'm listening to my iPod"
:P
User avatar
Vincenzo
Specialist
Specialist
 
Posts: 58
Joined: Mon Dec 06, 2010 6:50 pm
Reputation: 0

Unread postAuthor: the unit » Mon Dec 27, 2010 10:10 pm

if you used jsr sealing popoff style this would work perfect, the "deadspace" others are talking about would be used as chamber volume, when the desired pressure is reached the bb would pass through the seal. zero valve opening time and semi-auto
  • 0


the unit
Specialist
Specialist
 
Posts: 51
Joined: Tue Jun 24, 2008 8:20 pm
Reputation: 0

Unread postAuthor: ilovefire » Tue Dec 28, 2010 3:08 am

the unit:
that is pretty much what i was thinking, also you wouldnt have the flow restrictions that would come with having the air go though the bolt which then would be able to seal the mag 100%
  • 0

User avatar
ilovefire
Colonel
Colonel
 
Posts: 511
Joined: Sat May 22, 2010 6:48 am
Reputation: 0

Return to Pneumatic Cannon Discussion

Who is online

Registered users: anello, Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'