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 50 users online :: 4 registered, 0 hidden and 46 guests


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

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

PBMG

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
Sponsored 
  • Author
    Message

PBMG

Unread postAuthor: Hubb » Thu Feb 28, 2008 1:35 am

Not sure if this goes here, but whatever:

There have been several posts on BBMGs lately. I also recall a thread about someone asking about a paintball version and the answer was no; that the paint would break in the chamber. I got to thinking about this and came up with this design.

It's not a typical BBMG type, but is very similar. Would it work?

The hopper attaches to the central pipe, in its designated spot. The paint falls into place and catches on the detent. There is an air hose that connects to the middle section (the piece holding the detent) that runs to a valve. From there, the valve connects to a small chamber, which is powered by regulated CO2 / HPA.

Obviously, I left off some features, such as stock, trigger, etc, but this should give a general idea. It functions like a BBMG, as long as you hold the trigger (valve) it will fire.

The only problem I foresee is the back blast into the hopper.
  • 0

Attachments
PBMG.jpg
Diagram
PBMG.jpg (18.58 KiB) Viewed 1384 times
User avatar
Hubb
Major General
Major General
 
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Reputation: 2

Re: PBMG

Unread postAuthor: jackssmirkingrevenge » Thu Feb 28, 2008 1:43 am

hubb017 wrote:The only problem I foresee is the back blast into the hopper.


That, and paintballs tearing against the detent.

What youd need is some form of air/electric powered rotor that chambers and protects individual paintballs, something like this:

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: Novacastrian » Thu Feb 28, 2008 1:46 am

Instead of the square edges leading from the hopper to the barrel i think they would have to be smoothly contoured to allow a smooth flow of the paintballs (otherwise they might break). Apart from that it looks like a good idea, maybe a bit wasteful of air/co2 but what clouds/vortexs' don't waste air like a b!tch.

Edit: Bloody JSR strikes again! :D :roll:
  • 0

America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.

Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: Hubb » Thu Feb 28, 2008 1:50 am

Like I said, this is just a basic idea. If I build something like this, it would take a lot more thought.

JSR: That thing reminds me of the centrifugal force cannon the guys built on Mythbusters.
  • 0

User avatar
Hubb
Major General
Major General
 
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Reputation: 2

Unread postAuthor: jackssmirkingrevenge » Thu Feb 28, 2008 1:54 am

hubb017 wrote:That thing reminds me of the centrifugal force cannon the guys built on Mythbusters.


There would be an element of centrifugal force but the power would come from the air pressure in the chamber. Ideally it would not be spinning very fast, I would prefer to add more projectile notches to increase ROF than increase the rotor's RPM. Another advantage of this design is that the flow between firings would be heavily restricted by the rotor thus giving time for pressure to build up in the chamber, therefore more power :)
  • 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: Hubb » Thu Feb 28, 2008 1:59 am

Are you familiar with Tippmann's power tube? Would something like that help as well?
  • 0

User avatar
Hubb
Major General
Major General
 
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Reputation: 2

Unread postAuthor: jackssmirkingrevenge » Thu Feb 28, 2008 2:08 am

No idea, what does it do?
  • 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

Sponsored

Sponsor
 


Unread postAuthor: Hubb » Thu Feb 28, 2008 2:17 am

In short, it allows the flow of the air to the round. It narrows at the tip, which allows it to build more pressure, applying the Bernoulli Principle.

It also has a set screw in it to hinder the flow (for velocity adjustment).
  • 0

User avatar
Hubb
Major General
Major General
 
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Reputation: 2

Unread postAuthor: jackssmirkingrevenge » Thu Feb 28, 2008 2:22 am

Ah, a venturi of sorts? Would it really have any benefits though, we know from even basic pneumatic launchers that the less restriction you have on flow from your valve, the better the power.
  • 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: Novacastrian » Thu Feb 28, 2008 2:26 am

They gotta make their coin somehow jack.....
  • 0

America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.

Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Thu Feb 28, 2008 2:28 am

Novacastrian wrote:They gotta make their coin somehow jack.....


Sounds a bit like this device :roll: I'd need a chronograph to see the benefits.
  • 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: Novacastrian » Thu Feb 28, 2008 2:33 am

It can add up to 55hp to any vehicle*



*Individual results may vary

:lol: :lol: :P :D
  • 0

America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.

Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: Hubb » Thu Feb 28, 2008 4:23 am

Benefits? It seems that it would displace the air around the projectile more evenly, making for a more consistent shot. I wouldn't think it would make a big difference, however (nothing that could be seen on a chrono).
  • 0

User avatar
Hubb
Major General
Major General
 
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Reputation: 2

Return to BB/Airsoft/Pellet Gun Discussion

Who is online

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

Reputation System ©'