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 72 users online :: 4 registered, 0 hidden and 68 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Judgment Arms M1A1 MAW

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
Sponsored 
  • Author
    Message

Judgment Arms M1A1 MAW

Unread postAuthor: judgment_arms » Mon Dec 31, 2007 8:56 pm

Judgment Arms M1A1 M.A.W. 2 inch Shoulder Cannon, a First and a Last:

First things first, the technical data:

Caliber: 2inch, 50mm (2”X10”R M2 cannon cartridge)
Barrel length: 26 inches, 660mm, 13calibers

Reservoir: 2”X17” 53.4in3, 50X431.8mm

Muzzle velocity at 100psi: 220fps, 67m/s*
Muzzle energy at 100psi: 141ft*lb, 191.3J*
*according to the GGDT

Valve: unmodified “Frankenstein**” 1” sprinkler valve


Now let me explain what I mean by “a first and a last”:
Firsts:
1. “successful” use of cartridges.
2. “man portable” air cannon.
3. modular cannon (explained latter)
Lasts:
1. attempt at a man portable air canon that uses low pressure high volume (LPHV)
2. using a 1” sprinkler valve as a main valve

This cannon was designed to be a man portable grenade launcher, but this sucker is HEAVY. At 12lb this thing is definitely not a L.A.W. (Light anti-armor weapon), meaning the designation of MAW, or Multipurpose Assault Weapon, is more like Massive Assault Weapon.

The good news is that it works exactly as it should, besides being heavy, it’s about what I was gunning for.

Note the designation “M1A1” for those of you that don’t know, the A1 designation means this ain’t the original, its bean modified, a lot…

The original didn’t have a stock just pipe and no breach plug, the thinking was that the cartridge would throw itself out and still have enough power to put paint and NERFs down range at 230fps, obviously it didn’t work.

A1 version adds a plywood receiver, a pine wood stock and pistol grip (modeled from a Colt SAA grip frame), and a breach plate

On the muzzle there’s a 2” female threaded adapter, to which will attach some planed accessories, including: a bipod, 20” barrel extension turning it into a mortar, a choke for shot, and a 3”X12” barrel extension for larger projectiles.


*the valve is made from a conglomeration of 3 or 4 different valves because none of them worked as a whole; they all sounded like angry wookies.

Range Data will be added as I get some, questions, comment, criticism are welcome.

Here’s some photographs of the cannon and the GGDT data on it:
  • 0

Attachments
3 breach.jpg
Close up of breach plate and butt of stock
1 right side.jpg
Right side, you can see the safety switch
2leftside.jpg
The cannon, a cal .50 ammo can, and two 2”X10”R M2 cannon cartridges (these two don’t have any rims yet).
M1A1MAWGGDT.JPG
The GGDT file
Call me "Judge", it's easier to type.

Spud gun safety rules
User avatar
judgment_arms
Major General
Major General
 
Posts: 1272
Joined: Tue Oct 17, 2006 8:49 pm
Location: Not so beautiful North Carolina, but at least it’s the U.S.A.!
Reputation: 0

Unread postAuthor: jon_89 » Mon Dec 31, 2007 9:03 pm

Looks pretty good. Can you explain the cartridges more?
  • 0


jon_89
Colonel
Colonel
 
Posts: 607
Joined: Wed Apr 11, 2007 9:50 pm
Reputation: 0

Unread postAuthor: elitesniper » Mon Dec 31, 2007 9:07 pm

ha thats reall cool it kinda reminds me of nasa space shuttle
  • 0

User avatar
elitesniper
Brigadier General
Brigadier General
 
Posts: 1090
Joined: Sat Oct 13, 2007 8:40 pm
Reputation: 0

Unread postAuthor: judgment_arms » Mon Dec 31, 2007 9:12 pm

jon_89 wrote:Looks pretty good. Can you explain the cartridges more?


the air comes in through the slits in the side of the cartridge and pushes the projectile out the front, see pic.

if you need a more technical drawing give me a while and i'll dig up some of my high quality images.
  • 0

Attachments
cartridge.JPG
cartridge.JPG (12.28 KiB) Viewed 751 times
Call me "Judge", it's easier to type.

Spud gun safety rules
User avatar
judgment_arms
Major General
Major General
 
Posts: 1272
Joined: Tue Oct 17, 2006 8:49 pm
Location: Not so beautiful North Carolina, but at least it’s the U.S.A.!
Reputation: 0

Unread postAuthor: Maniac » Mon Dec 31, 2007 9:16 pm

nice and clean looks a little like some thing from halo. looks like theres some dead space from where the sprinkler valve is. also what is that coupler on the end for. Again go into a little more detail of how the cartridges work maybe a schematic, its probably really simple but i dunno.


edit, okay i understand do the cartridges seal well it looks like you might lose some air.
  • 0

Coodude26 wrote:
People who laugh really hard at stuff that pisses you off/you getting hurt, who then say "I'm sorry, I can't stop" but you know they easily could.

Mr.C: That's not as easy as you think. It's like me kicking you in the balls and telling you to stop crying.
User avatar
Maniac
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 496
Joined: Tue Oct 23, 2007 5:55 pm
Location: Right behind you
Reputation: 0

Unread postAuthor: judgment_arms » Mon Dec 31, 2007 9:32 pm

For those of you that still don’t understand the cartridge the first picture in the first post shows how it works.Gas Assisted Recoil Prototype

As for the dead volume, well it’s actually a good thing, according to the GGDT if I cut down the dead volume it it’ll cut back the muzzle velocity, go figure…

As for the resemblance to something in HALO, ain’t never played the game so they must have stolen the design from me:)

EDIT: Oh sorry, the coupler on the end of the muzzle, right:

On the muzzle there’s a 2” female threaded adapter, to which will attach some planed accessories, including: a bipod, 20” barrel extension turning it into a mortar, a choke for shot, and a 3”X12” barrel extension for larger projectiles.
  • 0

Call me "Judge", it's easier to type.

Spud gun safety rules
User avatar
judgment_arms
Major General
Major General
 
Posts: 1272
Joined: Tue Oct 17, 2006 8:49 pm
Location: Not so beautiful North Carolina, but at least it’s the U.S.A.!
Reputation: 0

Unread postAuthor: Maniac » Mon Dec 31, 2007 10:14 pm

oh guess i missed that. that dead voulume thing is kinda weird isnt it.
  • 0

Coodude26 wrote:
People who laugh really hard at stuff that pisses you off/you getting hurt, who then say "I'm sorry, I can't stop" but you know they easily could.

Mr.C: That's not as easy as you think. It's like me kicking you in the balls and telling you to stop crying.
User avatar
Maniac
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 496
Joined: Tue Oct 23, 2007 5:55 pm
Location: Right behind you
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: goathunter » Mon Dec 31, 2007 11:06 pm

You really out did yourself this time,Judgement.

Specifically the use of cartridges that let air in from the sides,very few would ever implement that system.Most consider it too hard to manufacture.Congrats man.When are you planning on a constant air hookup.Everybody needs a gun that sounds like angry wookies!

Any chance of a debut on a paintball field near me(SC/NC)?
  • 0

"Some people wonder all their lives if they've made a difference. The Marines don't have that problem"-Ronald Reagan

"KA BLAAM! Elimination! Lack of education."-Big Mama, Fox and the Hound, Disney

goathunter
Colonel
Colonel
 
Posts: 676
Joined: Thu Feb 15, 2007 9:20 pm
Reputation: 0

Unread postAuthor: judgment_arms » Mon Dec 31, 2007 11:38 pm

Chances of seeing this at field are slim, it’s to dang heavy. That and I’ve already got a much more compact high pressure low volume cannon on the drawing board, and it’s a three incher. :)

If by “constant air hookup” you mean a Co2 setup, the Palmer Stabilizer’s on it way.:)

As for the cartridges I have to thank good ‘ol Jack(smerkingrevenge) for a push In the right direction.:)

:):):) <sorry it's almost new years, going to start it with a smile!, and a few round o' .22 ratshot. :):):)
  • 0

Call me "Judge", it's easier to type.

Spud gun safety rules
User avatar
judgment_arms
Major General
Major General
 
Posts: 1272
Joined: Tue Oct 17, 2006 8:49 pm
Location: Not so beautiful North Carolina, but at least it’s the U.S.A.!
Reputation: 0

Return to Pneumatic Cannon Database

Who is online

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], Yahoo [Bot]

Reputation System ©'