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 58 users online :: 5 registered, 0 hidden and 53 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

LUPARA: In the works

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 

Like the name?

Yes!!
6
100%
Nope..
0
No votes
 
Total votes : 6
  • Author
    Message

LUPARA: In the works

Unread postAuthor: Brian the brain » Wed Dec 03, 2008 4:20 pm

Hi guys, haven't been online much lately.
Got two kids remember?
They keep me busy.(That and a PS3 with GTA 4 and Burn out Paradise :D )

But you can always count on me to bring you something never tried before...

After getting bored ( amazingly fast) with the full auto rifle I made,
I turned my attention back on creating the ultimate sawed-off.
I used old parts, for now, and tested a QEV at full unregged CO2 pressure.

The QEV held up nice.The valve was already modded to accept filling from the chamber side.
I hooked it up through an elbow, straight to a 12 gram adapter.
A hammer valve at the back does the rest.I had to mod a few things for everything to fit together..

Voila, a 900 psi repeater in 1/2" bore, firing lead balls halfway into wood, with a barrel effectively SHORTER that the 12 gram adapter!
Just take a look at the pic and you can see it is just pistol sized!

Halfway won;t do it for me, so I'll have to get me a longer barrel than that, but still.
Pleasing results!
Need a heavy hammer to set it off though.
But like with BT2B, I'll get it done.
About 6 shots a capsule.

Want to know about the name LUPARA, google it!
  • 0

Attachments
luparahalfwayin2wood.JPG
Damage.Might seem unimpressive, but the lead ball was flattened!
Longer barrel means all the way in next time!
luparahalfwayin2wood.JPG (31.29 KiB) Viewed 1871 times
luparaexplained.JPG
Just the basic pneumatic components.Striking the back with a ( regular ) hammer, sets it off.
Just a test right now.It might be turned into a revolver, or pump action, I don't know.
Lot's of possibilities.
luparaexplained.JPG (35.05 KiB) Viewed 1871 times
Last edited by Brian the brain on Wed Dec 03, 2008 5:29 pm, edited 2 times in total.
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: ALIHISGREAT » Wed Dec 03, 2008 4:24 pm

Thats some nice work, how long is the barrel? can't be more than 25cm?
  • 0

<a href="http://www.bungie.net/stats/halo3/default.aspx?player=ALI H IS GREAT"><img src="http://www.bungie.net/card/halo3/ALI H IS GREAT.ashx"></a>
Image
User avatar
ALIHISGREAT
Major General
Major General
 
Posts: 1779
Joined: Sat Aug 25, 2007 6:47 pm
Location: UK
Reputation: 0

Unread postAuthor: Brian the brain » Wed Dec 03, 2008 4:28 pm

try half that..
The breech is not even all the way in the back.


The brass bit is the end of the barrel, and the inner tube jumps back another cm..


If I would make it the size of my first sawed-off, the lead ball would disappear in that piece of wood, I'm sure.

Firings sound very crisp and clean, like a pneumatic nailgun.
Clunk!
  • 0

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: jitup » Wed Dec 03, 2008 4:36 pm

that is cool. wow, 900psi from a 12 gram? if you put a 3 1/2 ft barrel on this how would it perform? (is the chamber volume too small for that?) I ask because I am working on a .50 cal muzzle loader and was planning on using a 20 oz tank. do you think the 12 gram would work for me?
  • 0

if you live in Ohio join the Ohio Spud Gun and BBMG Association at http://www.ohiosga.webs.com
User avatar
jitup
1st Lieutenant
1st Lieutenant
 
Posts: 251
Joined: Wed Nov 12, 2008 1:40 pm
Location: North east Ohio
Reputation: 0

Unread postAuthor: ALIHISGREAT » Wed Dec 03, 2008 4:43 pm

whats the hammer valve like, is it just check-valve/non-return valve style?
  • 0

<a href="http://www.bungie.net/stats/halo3/default.aspx?player=ALI H IS GREAT"><img src="http://www.bungie.net/card/halo3/ALI H IS GREAT.ashx"></a>
Image
User avatar
ALIHISGREAT
Major General
Major General
 
Posts: 1779
Joined: Sat Aug 25, 2007 6:47 pm
Location: UK
Reputation: 0

Unread postAuthor: Brian the brain » Wed Dec 03, 2008 4:43 pm

It will for 6 shots, if you mod the QEV.
And use one heck of a hammer.

The output is more than enough to justify a longer barrel.
It will become much more effective, and more quiet as a result.


Normally a pneumatic dumps all it;s pressure, but not this one, so a longer barrel silences it.Well, not the hammer valve of course.
If you want to find out how to mod a qev, look up my BT2B thread and the 35 bar repeater.

JSR will probably provide the links anyway..

EDIT: the hammer valve is a poppet style valve.
Think bolt through hole, O-ring behind the bolthead.Like that.
  • 0

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: ALIHISGREAT » Wed Dec 03, 2008 4:46 pm

the hammer valve is a poppet style valve.
Think bolt through hole, O-ring behind the bolthead.Like that


yeah makes sense, is it a BTB custom? or an off the shelf part?
  • 0

<a href="http://www.bungie.net/stats/halo3/default.aspx?player=ALI H IS GREAT"><img src="http://www.bungie.net/card/halo3/ALI H IS GREAT.ashx"></a>
Image
User avatar
ALIHISGREAT
Major General
Major General
 
Posts: 1779
Joined: Sat Aug 25, 2007 6:47 pm
Location: UK
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Brian the brain » Wed Dec 03, 2008 4:54 pm

Custom, but no need for it to be.

I made it from a stock part that just had the wrong thread size.
A cut-up safety valve replaces the body, the stem I kept.
Threaded it to accept a small nut so I could keep it all together with a spring.

O-ring and bolt works just the same..
  • 0

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: JDP12 » Wed Dec 03, 2008 6:58 pm

Looks cool, can't wait to see the progress
  • 0

User avatar
JDP12
Major General
Major General
 
Posts: 1943
Joined: Fri Mar 30, 2007 8:34 pm
Reputation: 0

Re: LUPARA: In the works

Unread postAuthor: jackssmirkingrevenge » Thu Dec 04, 2008 12:29 am

Brian the brain wrote:Want to know about the name LUPARA, google it!


I'm familiar enough with a famiglia not to need to do that :D

Looking good, as always, and p-l-e-a-s-e make it pump action!

For those who were wondering, this is Brian's previous and very successfull attempt at making a hammer valve repeater.
  • 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: twizi » Thu Dec 04, 2008 7:32 am

brian the brian were do i get that 12 gram adapter need it for new build
  • 0

User avatar
twizi
Colonel
Colonel
 
Posts: 511
Joined: Thu Nov 27, 2008 9:04 pm
Location: up yours
Reputation: 0

Unread postAuthor: JDP12 » Thu Dec 04, 2008 8:53 am

Twizi- you can get them a lot of places- here's one.

http://www.palmer-pursuit.com/cart/inde ... cts_id=185
  • 0

User avatar
JDP12
Major General
Major General
 
Posts: 1943
Joined: Fri Mar 30, 2007 8:34 pm
Reputation: 0

Unread postAuthor: psycix » Thu Dec 04, 2008 9:28 am

Another true BTB production.
Well done!

Any chance of more pictures or videos?
  • 0

Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

Spudfiles steam group, join!
User avatar
psycix
Donating Member
Donating Member
 
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Thu Dec 04, 2008 11:00 am

For the lazy, here's where the name presumably came from.

Image
  • 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: Brian the brain » Thu Dec 04, 2008 1:23 pm

Yep that's it.
A 12 gram adapter is a standard paintball part.Lot's of shops should have it.

Pictures and/or video will follow when I finish it.Wich might take some time as the endproduct is ment for a customer.It needs to be clean.

Customer asked for a typical BTB product, namely a short, overpowered shotgun, wich can fire more that one shot off one charge.He doesn't have a compressor, so 12 grams it is.
Reloading mechanism is up to me, as he would be satisfied with a muzzle loader.

The pump action idea is proving kinda hard as I can't afford to use up much length to encorperate it in the design.
Idea's are welcome.
  • 0

User avatar
Brian the brain
Moderator
Moderator
 
Posts: 3494
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Country: Netherlands (nl)
Reputation: 29

Next

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'