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My Vortex BBMG Design - Tell Me What You Think

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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My Vortex BBMG Design - Tell Me What You Think

Unread postAuthor: revans » Wed Mar 05, 2008 1:38 am

Basically:
I've planned out a vortex bbmg on Google SketchUp and labelled it. It will be powered by a bike pump (Is this a good idea? I want it to be portable like http://www.spudfiles.com/forums/highly- ... 13193.html). (but not quite so ghetto)

The Diagram:
I couldn't draw some stuff in Sketchup so:
The yellow lines correspond to the air lines to the chamber. The green line represents the air line to the vortex. The pink dashes are ball valves to change where the chamber is connected to. No lengths e.g. barrel/chamber are finalised yet (you can say stuff about this too).
There will be a 1.5" or 1" elbow and pipe over the blow gun to make a handle. The bike pump will act as a secondary stock as it will be attached very securely (JB Weld?) to the tee. There may also be a pressure gauge on the chamber. I don't know what I'll be firing yet .177 or 6mm or 8mm.
BTW, the chamber will be blocked off from the tees attached to it, so it'll just be the 1.5" section of pipe.

Image

To use:
Adjust the ball valves so the one to the pump is open and the one to the blow gun is closed.
Pump bike pump until desired pressure is released.
Adjust the ball valves so the one to the pump is closed and the one to the blow gun is open.
Aim gun at target at trigger blow gun.

Also:
I plan on using this blowgun http://www.totalbodyshop.co.nz/product_ ... cts_id=622
I am thinking about getting this 2 way pump http://www.dynamicsport.co.nz/shop/coac ... o-way-pump

And:
Any comments are really welcome. Tell me if I'm crazy, stupid, amazing or give me suggestions or improvements or bash my ego and tell me to scrap the whole thing, whatever.

Cheers, Revans
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Last edited by revans on Wed Mar 05, 2008 1:51 am, edited 1 time in total.
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Unread postAuthor: Davidvaini » Wed Mar 05, 2008 1:51 am

to attach the bike pump I would suggest epoxy. I'm not a huge fan of the bike pump for vortex's but thats just me... I'm a fan of a co2 tank...

I would also suggest not to have any loose tubing outside of the gun because I think it looks tacky... I would also suggest doing an inline vortex with a plunger rather than a T.

Another note... I notice you can decide on what barrel... so I would suggest threading into your vortex block so you can have different size barrels.

Also don't be like a lot of these noobs and not paint your gun.... My personal opinion is if a gun isnt painted or presented propperly then its just another inline and its pretty much crap.
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Unread postAuthor: revans » Wed Mar 05, 2008 1:56 am

Yeah I agree with basically everything you've said, except: I don't really want a co2 tank because of the cost (in NZ). The tubing won't actually be outside the gun. It'll be concealed as much as possible, I just drew it outside. I'm definitely going to paint it because I'm really into aesthetics, I'll go for either a gloss blue or orange or matt black gun look.
However, I don't have an opinion on the inline vortex with a plunger or threaded vortex block because I don't know what they are.

Edit: I've heard of half hole and 3/4 hole vortex blocks that are better than usual ones. After searching I haven't found much except for mentions of them. Can anyone enlighten me or show me where to find enlightenment?
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Unread postAuthor: Davidvaini » Wed Mar 05, 2008 2:10 am

an inline vortex with a plunger is a straight pipe with the vortex block at the end of it... the plunger is a flat round piece with a spring that pushes the bb's tightly into the vortex block... The plunger allows you to fire at any angle and you never have to shake the gun to fire, it also reduces the noise the gun makes when you run around(better for airsoft)

Below is a picture of an inline vortex block... the plunger would come in from the left and push the bb's into the block.
Image


A threaded block just means that there is threads going into where the barrel is... The barrel in that picture is the 1/4 brakeline. so you can screw in any barrel you want...

Also there is always the option of a Vortex cap if you are really into aesthetics.



http://www.spudfiles.com/spud_wiki/index.php?title=BB_machine_gun
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Unread postAuthor: revans » Wed Mar 05, 2008 2:32 am

Thanks for the info Davidvaini, I might modify my design a bit now.
Also, would you be able to help me out about half-hole, 3/4-hole, full-hole vortex blocks? I've searched but have now idea what they are. Can you incorporate them into inlines?
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Unread postAuthor: Davidvaini » Wed Mar 05, 2008 2:48 am

yes you can incorperate them into inlines... all it means is that part of the hole is covered up.. so like half hole means there the hole that the bb's fall into is half way covered...

Full-hole: O
Half-hole: D

The reason they cover part of the main hole is so that not too many bb's go into it at once and cause a jam.


If you are still unclear about what I mean with the plunger and an inline here is a picture of a clear inline to illustrate the concept.
Image
The spring plunger is attached to the cap at the end of the gun... simply unscrew the cap and pull it along with the plunger out at once to reload.

If you want to see what a vortex cap is... then take a look at the RC-P240 BBMG... the link can be found in my signature.
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Unread postAuthor: jackssmirkingrevenge » Wed Mar 05, 2008 3:24 am

Your air supply will only last a couple of seconds of firing, so you should keep your BB chamber as small as possible in order not to lose too much pressure to expansion. This is what I did with my Standalone Project.

Yopu can make it even more efficient by having the BBs in a pressurised chamber and triggering it with a ball valve between the barrel and the chamber as in the diagram below. This gives you zero dead space, no matter what your BB capacity is ;)

Image
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Unread postAuthor: revans » Wed Mar 05, 2008 4:28 am

Thanks JSR, I'm think now I'm going to use an upside down 40mm tee with the perpendicular part blocked off and a male socket + threaded cap on the end, so that should be small enough? how many bbs might that hold?
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