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 :: 4 registered, 0 hidden and 63 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Design for my 1st BBMG

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

Design for my 1st BBMG

Unread postAuthor: Luvs2spooge » Mon Nov 29, 2010 2:17 pm

So this is my first BBMG that I am working on. If ya can't tell, I always go all out and go extreme. So it's going to be running off of a 72ci/3000 psi paintball tank. The regulator in the tank will only let 800psi out at a time. So it should still send rounds down the range fairly well.

I do have a question for everyone though. I want to use 1/4" or 3/8" steel ball bearings. Where should I look to try and find them? I looked at sling shot ammo, which is 1/4", but it is not 100% round, it has 2 flat spots on each side and I figured that would mess with the vortex chamber.

Let me know what you think Thanks!
  • 0

Attachments
Gun-Blue-Print.gif
My design

Luvs2spooge
Private
Private
 
Posts: 4
Joined: Mon Nov 29, 2010 1:10 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Nov 29, 2010 2:22 pm

Why bother with a vortex block when a simple cloud chamber will do you just as nicely, especially with HPA?
  • 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: Luvs2spooge » Mon Nov 29, 2010 2:39 pm

Thanks for the input jackssmirking. I cannot find a diagram on how to build a proper cloud chamber...... know where I can find one?
  • 0


Luvs2spooge
Private
Private
 
Posts: 4
Joined: Mon Nov 29, 2010 1:10 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Nov 29, 2010 3:38 pm

Really you just need a chamber hooked up to the barrel on one side and the pressure washer on the other, this was my design:

Image

Some kind of o-ring seal between the chamber and the barrel that temporarily stops the BBs at the breech will help increase power and keep rate of fire at managable levels, currently playing with something along these lines here:

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: Zeus » Mon Nov 29, 2010 3:55 pm

If you go with JSR's design, I'll add that reloading could be a slight PITA, if you placed a camlock or union in the chamber and reloaded via that it might make it somewhat simpler.

You can use SCH 40 steel to construct it, 150mm by 15mm/1/2 inch nipple for the chamber and assorted fittings, if you do it well you could have it working to an extent within a day.

I don't need to tell you to be careful woth those pressures, JSR might dig up a thread involving a failure at 800PSI, you won't want to dig shrapnel out after a failure.[/b]
  • 0

/sarcasm, /hyperbole
User avatar
Zeus
Major General
Major General
 
Posts: 1422
Joined: Tue Oct 27, 2009 7:34 pm
Location: 'Straya, C*nt
Reputation: 2

Unread postAuthor: Gun Freak » Mon Nov 29, 2010 4:58 pm

@Zeus, that failure was on a solid epoxy setup not casted properly. A steel chamber won't fail at 800 psi.
  • 0

OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: Zeus » Mon Nov 29, 2010 5:10 pm

I'm well aware of that, I was just using it as an example of how potentially powerful such pressures can be.

SCH 40 will handle 800PSI easily, and it's failure mode is much safer.

Edit: Noob grammar.
  • 0

Last edited by Zeus on Mon Nov 29, 2010 10:49 pm, edited 1 time in total.
/sarcasm, /hyperbole
User avatar
Zeus
Major General
Major General
 
Posts: 1422
Joined: Tue Oct 27, 2009 7:34 pm
Location: 'Straya, C*nt
Reputation: 2

Sponsored

Sponsor
 


Unread postAuthor: Gaderelguitarist » Mon Nov 29, 2010 10:48 pm

The design looks good (as far as sketches go). Personally, I like to model my builds out in google sketch-up, but each to his own.
I have to agree with JSR. A cloud chamber with a detent would make a lot more sense than fiddling with a vortex block. Just make sure you have an easy way to reload and your chamber can handle the pressures you are exerting on it. Design flaws are old hat.

For some steel balls, your most reliable bet would be Mcmaster-carr. Granted, they are a bit expensive, but I almost exclusively get all of my uncommon materials from them. A second option would be to search ebay.
  • 0

so many muchness
User avatar
Gaderelguitarist
Colonel
Colonel
 
Posts: 580
Joined: Sat Aug 16, 2008 9:56 pm
Location: Columbia, MD
Reputation: 0

Unread postAuthor: Luvs2spooge » Mon Nov 29, 2010 11:19 pm

Thanks for all the input. I will get a new post up when I get more into the construction. Hey Gaderel, nothing wrong with google sketch-up, but when you have already paid for adobe photoshop, indesign, and illustrator, you tend to just stick with that. lol

As far as the high pressure goes, i'm VERY aware of what can happen if something goes wrong. The camber itself, and anything else that needs to be air tight will def be made of something that can with stand high pressure. I'm not so sure I like the idea of either being mangled or killed.
  • 0


Luvs2spooge
Private
Private
 
Posts: 4
Joined: Mon Nov 29, 2010 1:10 pm
Reputation: 0

Unread postAuthor: Lockednloaded » Mon Nov 29, 2010 11:26 pm

Luvs2spooge wrote: I'm not so sure I like the idea of either being mangled or killed.

Now thats the sign of a dedicated spudder :lol:

as for bearings, mcmaster has nearly every size imaginable
  • 0

I love lamp
User avatar
Lockednloaded
Major General
Major General
 
Posts: 1558
Joined: Thu Sep 03, 2009 9:38 pm
Location: Texas, USA
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Nov 29, 2010 11:45 pm

Lockednloaded wrote:as for bearings, mcmaster has nearly every size imaginable


Also, I got 3/8" bearings from eBay sold as slingshot ammo and they certainly didn't have flat sides...

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: Gaderelguitarist » Tue Nov 30, 2010 12:03 am

Hey Gaderel, nothing wrong with google sketch-up, but when you have already paid for adobe photoshop, indesign, and illustrator, you tend to just stick with that. lol


Oh I agree to an extent. I use the adobe programs for my digital artwork, and leave the more precision based stuff to Sketch-up. In the end it all breaks down to what you're more comfortable with. Most of the users on this forum stick with paint, while some produce fantastically rendered models of their plans.

Also, I forgot to applaud you for your aesthetic considerations with your design. I'm a strong advocate of "hiding the pipes". Just make everything serviceable.
  • 0

so many muchness
User avatar
Gaderelguitarist
Colonel
Colonel
 
Posts: 580
Joined: Sat Aug 16, 2008 9:56 pm
Location: Columbia, MD
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Tue Nov 30, 2010 12:36 am

Gaderelguitarist wrote:I'm a strong advocate of "hiding the pipes".


... though there is beauty in showing your working too ;)
  • 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: Gaderelguitarist » Tue Nov 30, 2010 11:45 am

jackssmirkingrevenge wrote:
Gaderelguitarist wrote:I'm a strong advocate of "hiding the pipes".


... though there is beauty in showing your working too ;)


Well sure there is, and sometimes naked pipes is the way to go. It's just that extra step that some people take to go from a series of pipes to something that looks like it's not home built. What fun would commercial bb guns be if they had pvc handles and pipe insulation buttplates? :D
  • 0

so many muchness
User avatar
Gaderelguitarist
Colonel
Colonel
 
Posts: 580
Joined: Sat Aug 16, 2008 9:56 pm
Location: Columbia, MD
Reputation: 0

Return to BB/Airsoft/Pellet Gun Discussion

Who is online

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

Reputation System ©'