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Posted: Sat Jun 21, 2008 9:20 pm
by Davidvaini
Well when you have it loaded with 3 shells and you fire one.. that one becomes lighter than the other ones. So naturally gravity will pull the other two down, thus rotating the barrels. I fired the next shell and it becomes lighter thus the last shell/barrel rotates down. This effect increases even more when i remove the shells that I shot.
Posted: Sat Jun 21, 2008 9:30 pm
by elitesniper
Ahhhh!, thats really neat!

hope ya have fun with it.
Posted: Sat Jun 21, 2008 10:30 pm
by Davidvaini
thanks, I hope it gets nominated for the BBMG/Launcher contest.
Posted: Sun Jun 22, 2008 3:31 am
by Pyro Ninja
Good job

, now make a video.
Posted: Sun Jun 22, 2008 6:12 am
by psycix
Wow, I like the way of rotating those barrels!
But dont they spin and wobble while moving?
What is the firing mechanism to actually fire off a cartridge?
Posted: Sun Jun 22, 2008 10:54 am
by Davidvaini
a button on the back of the co2 inflator. and no the barrels dont spin around and move while moving unless I roll on the ground... in which case it auto corrects itself anyways. Its like a gyroscope in that aspect.
Posted: Sun Jun 22, 2008 12:32 pm
by blind909
If you dont already have a design for the co2 inflator, you could try
this, and then just paint the co2 inflator.
Posted: Sun Jun 22, 2008 12:47 pm
by Antonio
looks nice. but yeah looks arent that much to me. I would like to c the working. I have read ur other post on the cartriges, why not post a link and ellaborate on the concept. I guess u got inspired by solar right? I am looking foward to a movie:)
Posted: Sun Jun 22, 2008 2:21 pm
by Davidvaini
no, what did solar do?
I will post a
link to the cartridges from here. I probably won't be able to post a video until after 27th.
Just curious ANT have you seen the video of one of these cartridges firing?
Posted: Sun Jun 22, 2008 2:51 pm
by Antonio
yeah for sure:) its look pretty nice. Isnt there a way though that you could precharge the cylinder and burst ehm with a small pin which is attached to the trigger. Btw you are kiddin me that you have not heard about solar> he won the big prize:
http://www.spudfiles.com/forums/eclipse ... t7879.html
btw my name is ANTON, when I joined this forum I wasnt sure if I should give away my name. I thought I could change it later on. Ant sounds kinds small lol... but yeah anyways
Posted: Sun Jun 22, 2008 4:17 pm
by Davidvaini
lol I didnt know you meant that gun, of course I know about solar's revolver but no that is not where I got my idea from... I just decided to make a multi barrel grenade launcher out of a few spare parts.
I could do a trigger system with a reverse spring to slide the bolt back and pierce the cartridges but this is just as easy. Besides I would much rather have a front or side grip anyways for this beast.
Maybe for my rotating 12 barrel I might have something but that wont be for a while.
Posted: Sun Jun 22, 2008 6:35 pm
by Ragnarok
Davidvaini wrote:Valves are burst disks and actually the lack of weight of the cartridges being removed/fired actually rotates the barrels.
That's actually damned ingenious, although I assume you won't be able to cant the system too significantly...
Posted: Sun Jun 22, 2008 7:28 pm
by Imortal87
Ragnarok wrote:although I assume you won't be able to cant the system too significantly...
From what I can see you can turn/rotate it anyway you want
Posted: Mon Jun 23, 2008 9:00 am
by judgment_arms
Pretty slick!
Gravity reload… HA! Now that is cool.
What’s next?
Perhaps you could build on auto-cannon based loosely off the Autococker mechanism.
Bah… fine… I’ll go work on mine…
Posted: Mon Jun 23, 2008 8:39 pm
by mark.f
Nice! Preloaded cartridges seem to be a prevalent method of getting semi-automatic firing. I don't think I would like the gravity reload system too much in a combat situation, though. I'd be too worried of a "jam". Perhaps some sort of ball-bearing locker to keep the barrels aligned with the gasket and to keep the drum from moving when running around or diving into the dust? The ball-bearings would allow enough of a grip so that the drums don't move around wantonly, but will rotate when you turn the drum manually.
Good job!