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Brogden's First BBMG *NEW PICS PAGE 2*

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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Brogden's First BBMG *NEW PICS PAGE 2*

Unread postAuthor: brogdenlaxmiddie » Tue Aug 19, 2008 2:05 pm

Ok, so here's my first BBMG, based off of the design by DavidViani. Its a inline vortex bbmg thats housed in a 2" piece of PVC pipe. It has a 30 inch long barrel and the air source comes from an eight gallon air compressor. I didn't take any pictures, but pretty detailed videos of it.

If you must see something else, please just let me know and I can go take a pic or video of it. Thanks for looking!

Thomas


New pics on page 2!



[youtube]http://www.youtube.com/watch?v=69LzkSH-hrE[/youtube]


[youtube]http://www.youtube.com/watch?v=ZKsTpK1g82Q[/youtube]

[youtube]http://www.youtube.com/watch?v=5wEzpA4MW_M[/youtube]
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Last edited by brogdenlaxmiddie on Wed Aug 20, 2008 12:51 pm, edited 2 times in total.

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Unread postAuthor: blind909 » Tue Aug 19, 2008 2:29 pm

Real nice! Could you get up a picture of the whole gun assembled? cause I dont think any of the videos showed it all assembeled.
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Unread postAuthor: brogdenlaxmiddie » Tue Aug 19, 2008 3:15 pm

Ok, I have some more stuff loading on Youtube.... ( anybody know what it means when its being processed? and why is it taking so long?)
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Unread postAuthor: MaxuS the 2nd » Tue Aug 19, 2008 3:30 pm

It means that it's being converted into a viewable file and uploaded to the relevant server. They're probably also checking to see if it's against the rules or not.
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Unread postAuthor: ALIHISGREAT » Tue Aug 19, 2008 3:31 pm

"There's the foot" LOL that made me laugh sooo much :D
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Unread postAuthor: Pilgrimman » Tue Aug 19, 2008 3:57 pm

"There's the foot" LOL that made me laugh sooo much


Seconded

Nice gun, man! And the foot gave it that true Spudfilian touch :lol:
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Unread postAuthor: brogdenlaxmiddie » Tue Aug 19, 2008 4:05 pm

Thanks, I actually thought, huh, im not going to have a foot picture.... lets put it in the video! lol, But seriously though, I do have a video of someone being shot with it... its currently "being processed"
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Unread postAuthor: Davidvaini » Tue Aug 19, 2008 5:08 pm

looks good, one tip I would suggest is making the barrel a foot shorter. That long of a barrel actually adds friction and lowers velocity.

Other than that, great job on the construction and great job on the movie.

EDIT:

lol I love this video of yours where you shoot your brother:

[youtube]http://www.youtube.com/watch?v=5wEzpA4MW_M[/youtube]
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Unread postAuthor: brogdenlaxmiddie » Tue Aug 19, 2008 5:22 pm

Thanks for posting the vid! I was just about too :roll: but thanks for the comments. David- How much of an increase would you propose?
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Unread postAuthor: Davidvaini » Tue Aug 19, 2008 6:40 pm

brogdenlaxmiddie wrote:Thanks for posting the vid! I was just about too :roll: but thanks for the comments. David- How much of an increase would you propose?


It all depends on the initial velocity of the bb. Its the long length of the barrel that adds to the friction.

At about 400fps with .20g BB's its not a good idea to go past 600mm (23 inches). Most bbmg's dont go above 400fps. I have seen guns that get cutt down from 3 feet down to 2 feet and get 100 more fps. But it all depends on your initial velocity and the weight of the bb. Also if you have a hopup it will increase the chance of a bb getting more friction in the barrel due to the bb spin. Its all about finding the magic barrel length for maximum velocity/accuracy.
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Unread postAuthor: daberno123 » Tue Aug 19, 2008 8:13 pm

I like it, it looks good for being your first. However, I was a little disappointed that in your first video the knife wasn't added to the muzzle as a bayonet. :twisted:
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Unread postAuthor: kablooie » Tue Aug 19, 2008 9:00 pm

If you don't mind me asking, what kind and how big of an air compressor are you using? Very nice bbmg, your videos are really nicely done too (the brother one is priceless).
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Unread postAuthor: Pilgrimman » Tue Aug 19, 2008 9:06 pm

I think he said he's using an 8-gallon, but I don't think he specified the brand...
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Unread postAuthor: POLAND_SPUD » Tue Aug 19, 2008 9:25 pm

ol I love this video of yours where you shoot your brother
I have to second that... it's priceless
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Unread postAuthor: brogdenlaxmiddie » Tue Aug 19, 2008 9:25 pm

Ummm, I'm not sure of the brand right now, tomorrow though I'll go check it out and let you guys know. Its really cool though, I can slightly squeeze the trigger and it shoots slowly but when i full open the valve, it goes absolutely wild!
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