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 66 users online :: 6 registered, 0 hidden and 60 guests


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

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

unregulated metal bullpup: ADR-50

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.
Sponsored 
  • Author
    Message

Unread postAuthor: Hubb » Tue Nov 13, 2007 10:04 pm

Brian, I will agree with the masses on this one. This is very nice and I'm looking forward to the finished product / more pictures.

M22 is a course metric thread. It is considered a standard type thread, sort of like a "1/4" bolt or something.
  • 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: Brian the brain » Wed Nov 14, 2007 12:00 am

I agree this would look better than a hat full of..monkeys behinds, but that is not the point hahah
  • 0

Attachments
wouldlook better.JPG
I 'm giving it all she's got captain!
I just don't have the fittings!!!
Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
User avatar
Brian the brain
Moderator
Moderator
 
Posts: 3494
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Country: Netherlands (nl)
Reputation: 29

Unread postAuthor: jackssmirkingrevenge » Wed Nov 14, 2007 12:58 am

Brian the brain wrote:but that is not the point hahah


Indeed, screw aesthetics on this one, I want to see this sort of BB power combined with the rate of fire of a a normal cloud :D

I got 650 feet per second for steel BBs with circa 350 psi of air in this design - I'm guessing you'll get something in the 800-900 feet per second range with this setup which should give you fearsome penetration :shock:
  • 0

Last edited by jackssmirkingrevenge on Wed Nov 14, 2007 2:52 am, edited 1 time in total.
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: c19o » Wed Nov 14, 2007 12:59 am

That is so forking awesome. Damage pics please! :D
  • 0

User avatar
c19o
Major
Major
 
Posts: 356
Joined: Thu Dec 14, 2006 11:59 pm
Location: Fairfield Bay, Arkanasas
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Wed Nov 14, 2007 2:53 am

Any chance of using HPA instead of CO2?

edit: and with regards to aesthetics, why not buy a cheap airsoft springer like Dornep had done and try and stuff your mechanism into the outer shell?

Something like this MP5 can be bought for a pittance, it has a relatively large and roomy frame and the extra barrel length can be hidden in a silencer (that presumably you're going to need anyway :D)
  • 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: mark.f » Wed Nov 14, 2007 6:53 am

Looks great! But how much extra performance are you expecting to get from the increase in pressure? Not trying to be a stick in the mud or anything, but we won't know until you test it. Therefore, test! And show us results.

I also have to suggest a few things for a reservoir. If you have the tooling, I think something like a 2" pipe nipple capped on each end would work perfectly. It could then be tapped for fittings using a drill bit and a H.S.S. tap.

Next thing would probably have to be a vortex design. :roll: It might not increase performance by a huge factor but "the masses" won't be silenced until you or somebody else tries it.

All in all, good start. Just finish it now so I can sleep peacefully sometime soon, without wondering whether I should go dump forty bucks for the CO<sub>2</sub> input and pipe fittings to build my own.
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: jackssmirkingrevenge » Wed Nov 14, 2007 7:21 am

It's the pressure that provides the motive power to the BBs, so technically twice the pressure should give twice the power, and a 150% of the velocity. Other than my burst fire project, I haven't seen strafers use pressures over 300 psi, so the power should at least double over what we've seen before.

The unknown factor is the flow from the pressure handle but I'm assuming it's at least as good as a blowgun so the benefits of the increased pressure should be clear.
  • 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: Hotwired » Wed Nov 14, 2007 8:33 am

The bend in the barrel isn't giving any problems then?
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Unread postAuthor: Brian the brain » Wed Nov 14, 2007 11:29 am

At the moment, I don;t even have .177 bb's..

A couple of years ago ( before my first shotgun I think) I made a bbmg with a wooden vortex block, with onboard air reservoir.Since I don't won a compressor, that was the only way to see if I liked the idea of a bbmg.
Fortunately, I do have a trackpump wich puts out over 300 psi.The reservoir was longer than the barrel( about a foot) and rand back and forth 3 times, to create enough volume.It looked hideous, but it was built for testing purposes only.
Even though the pressure drop was huge, it managed to tear up a steel can, almost cutting it in half from left to right, before the air ran out.Separate impacts looked exactly like the ones in the video.
The barrel diameter was a full millimeter too wide...just to give you an idea of the power.

This time the barrel is "only" 0.2 mm too wide.Pressure is more than doubled...barrel lenght about the same or longer..flow of the pressure washer handle is at least double that of a blowgun..( just the pipe going from the bottle to the handle restricts flow severely atm)

I'm pretty sure it will live up to it's name.
Patience people!! I can only get to the store on saturday's and the next two weeks I have to work the weekends myself...so...

Oh and I have an M16 airsoft rifle, but I don't want to use a shell to make it look better.I'll use epoxy and my imagination..
  • 0

Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
User avatar
Brian the brain
Moderator
Moderator
 
Posts: 3494
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Country: Netherlands (nl)
Reputation: 29

Unread postAuthor: jackssmirkingrevenge » Wed Nov 14, 2007 11:35 am

I'll use epoxy and my imagination


That always worked for me :) though not in the aesthetic department.
  • 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: HaiThar » Wed Nov 14, 2007 11:38 am

Very nice gun. What is the kick like?
  • 0

Kthx, BAI
User avatar
HaiThar
Donating Member
Donating Member
 
Posts: 227
Joined: Fri Sep 14, 2007 12:12 am
Reputation: 0

Unread postAuthor: SPG » Wed Nov 14, 2007 1:08 pm

I can't even work out how the CO2 gets to the BBs and then the lot get back out the barrel, have I missed something?
  • 0

User avatar
SPG
Major
Major
 
Posts: 364
Joined: Thu Feb 09, 2006 11:55 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Wed Nov 14, 2007 1:18 pm

As far as i can tell it's similar to the LARC in operation.
  • 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: )DEMON( » Wed Nov 14, 2007 1:54 pm

Woh! that is insane! Well done Brian, you make me jealous for sure, I wish I had a pressure washer.

Very nice work, be sure to get some vids up. (that might be hard if you still have dial up) :D
  • 0

Forever dreaming...
User avatar
)DEMON(
Major General
Major General
 
Posts: 1391
Joined: Sun Mar 12, 2006 1:22 pm
Location: Johannesburg South Africa
Reputation: 0

Unread postAuthor: Infernal Maveric » Wed Nov 14, 2007 3:43 pm

Wow! Outstanding Brian!

Nu-skool BBMGs have just been born! I for one cannot wait for videos and/or damage pictures as it seems like this baby will do some serious destruction!

Keep up the work big guy!
  • 0

User avatar
Infernal Maveric
2nd Lieutenant
2nd Lieutenant
 
Posts: 220
Joined: Sat Oct 08, 2005 3:41 pm
Reputation: 0

PreviousNext

Return to BB/Airsoft/Pellet Gun Database

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'