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Davidvaini's Compact Bullpup Inline Vortex

Built a BB Machine Gun? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Davidvaini's Compact Bullpup Inline Vortex

Unread postAuthor: Davidvaini » Wed May 21, 2008 4:20 pm

hey guys, for a while now I have been trying to figure out different ways to incorperate a BBMG into a small design. I invented the vortex cap and it was quite effective. But I decided to take a step back into inline vortex's and decided to come up with a design that would allow a large amount of ammo but still have a decent size barrel and not be 16+ inches long.. So I decided to create this compact bullpup.

Image

You might take a quick glance at this and think its a cloud or a vortex with a 1" barrel but the barrel is actually 8 inches long. the overall length of the gun is around 9 1/2 inches long.

As you can see the barrel is housed inside the ammo chamber... the vortex is in the back of the gun and the ammo loaded in the front around the barrel... the spring and plunger both have a center cavity to allow the barrel to be inside.. the plunger simply pushes the bb's around the barrel into the vortex block and back out the way they came.

Barrel length: 8"
Gun Length: 9.5"
BB Capacity:~2000 (its just a guess)
Feeding system: Bullpup Inline Vortex
ROF: 125bb/s
FPS: 370

As you could tell from the above picture there was no blowgun trigger.. I am in the process of building the trigger setup but I took a quick picture of what it may end up looking like:
Image

so yeah just another attempt of me trying something new so tell me what you think.
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Last edited by Davidvaini on Sun Jun 01, 2008 10:23 pm, edited 2 times in total.
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Unread postAuthor: JDP12 » Wed May 21, 2008 4:22 pm

i like it, i had actually star to build that for a BBMG for a friend, but he decided he didn't want one any more so i discontinued it..

nice
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Unread postAuthor: Necrosis » Wed May 21, 2008 4:29 pm

That's actually pretty cool mate.

Now invent an air supply that's not backpack sized! :wink:
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Unread postAuthor: Davidvaini » Wed May 21, 2008 4:48 pm

Necrosis wrote:That's actually pretty cool mate.

Now invent an air supply that's not backpack sized! :wink:



20oz co2 tank.

done!
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Unread postAuthor: psycix » Wed May 21, 2008 5:23 pm

Awesome thingy you have there!
Looks very nice.
Building it coaxial style surely cuts down the length.

When will we see it firering?
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Unread postAuthor: Davidvaini » Wed May 21, 2008 5:41 pm

psycix wrote:Awesome thingy you have there!
Looks very nice.
Building it coaxial style surely cuts down the length.

When will we see it firering?


as soon as my other computer is fixed I will have a video uploaded.
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Unread postAuthor: jrrdw » Wed May 21, 2008 6:05 pm

Put that video on Photobucket, please. Thats a sweet set up I'm impressed! Should have saved this for the contest that mite be. :D
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Unread postAuthor: Davidvaini » Wed May 21, 2008 6:17 pm

lol jrrdw... you know me... im never out of ideas.

my next project will make this one look like poop on a stick
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Unread postAuthor: JDP12 » Wed May 21, 2008 6:29 pm

or mine will.... (muhahahahaha)

but back on topic, i can't wait to see a vid of that
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Unread postAuthor: psycix » Thu May 22, 2008 4:44 am

Davidvaini wrote:lol jrrdw... you know me... im never out of ideas.

my next project will make this one look like poop on a stick


I can see the poop, but where is the stick? That 1"piece of barrel sticking out?
Thats too short, because if you were holding the poop on a stick that way, your hands may get dirty. :roll:
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Unread postAuthor: Antonio » Thu May 22, 2008 1:17 pm

Nice. Can you work of a mobile air supply?
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Unread postAuthor: al-xg » Thu May 22, 2008 2:21 pm

Is there a seal on the plunger ? or just on the cap ?

I started heading that way with my first strafer but never actualy made the plunger system.

I made a new block the other day with an under-barrel tube magazine and the plunger has an O-ring to reduce dead space as the bb's empty.
The bb capacity is much lower though, a few hundred, but air usage is cut down quite alot.

Looking forward to seeing the next developments :)
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Unread postAuthor: psycix » Thu May 22, 2008 3:50 pm

The problem I can see with a sealing plunger, is that pressure will push it back.
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Unread postAuthor: Davidvaini » Thu May 22, 2008 4:43 pm

there is room around the plunger.. its tiny but enough for air to get by... so no the plunger does not seal the air...it just pushes the bb's into the vortex block like any other inline... it just slides over the barrel.


and yes ant I can hook up mobile air to it like all of my guns..
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Unread postAuthor: Davidvaini » Sun May 25, 2008 3:20 pm

UPDATE:

So I did a quick mockup on attaching this gun to my FN2000 as sort of a grenade launcher attachment.

so here is a pic:

Image
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