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 71 users online :: 5 registered, 0 hidden and 66 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

B.A.R. Pnuschnikov full auto prototype

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

Unread postAuthor: ramses » Tue Mar 02, 2010 9:12 pm

Unfortounately, I think I have found a flaw. The bold will be locked in the open position by the QC, and be allowed to move forward when the sleeve is actuated, as opposed to backward for a blowback.

I will go play in my basement and see what I can come up with.
  • 0

POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name :D
User avatar
ramses
Major General
Major General
 
Posts: 1679
Joined: Thu May 29, 2008 6:50 pm
Reputation: 3

Unread postAuthor: Brian the brain » Wed Mar 03, 2010 2:49 am

Ehm..no..?
Everything is working the way it should.. :roll:

You'll get it when I finish it tonight.
I will have to cut some of the grooves inside of the QD to have it disconnect smoother and add 1 or two extra rings to the spring.

Maybe it's just a little hard to get from a picture.
I know I have been staring at other people's pictures before thinking WTF??
:D
I have tried it on the gun.
The bolt remains locked untill the sleeve is pushed back.

Right now it's hard to push back the sleeve while the bolt is under pressure ( while I'm pulling it) but my adaptations should make it open smoothly.

Edit: Only fair to post the diagrams I made for the French here too:
  • 0

Attachments
Schema Pnuschnikov.jpg
To explain the bolt unlocking system:
Snapvalve versus pop-off.jpg
To explain the snapvalve
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: Demon » Wed Mar 03, 2010 9:38 am

B.A.R. Pnuschnikov ( breechlock almost done!)


Ok

I really need to stop being lazy and get to work if i want to catch up (You are taking a big advance)

EDIT:

After re-watching the vid, i might make one for airsoft ...
But with onboard air supply and a scope, it would be really nice .
  • 0

User avatar
Demon
Colonel
Colonel
 
Posts: 743
Joined: Sun Apr 13, 2008 8:46 am
Reputation: 0

Unread postAuthor: Brian the brain » Wed Mar 03, 2010 5:36 pm

I really need to stop being lazy and get to work if i want to catch up (You are taking a big advance


Yes I am..
Something comes over me and stuff just falls into place..what can I say...

:D

[youtube]http://www.youtube.com/watch?v=vV9FIzZTBNs[/youtube]

Unfortunately, I think I have found a flaw.


Muhahaha!! :twisted:
ramses...you can come out of your basement now!!
I can't believe I pulled this off so cleanly..
I will refine the connection between the connector-rod and the bolt release...but that boltlock is probably the most ingenius thing that ever " happened" to me... :roll:
  • 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: ramses » Wed Mar 03, 2010 7:51 pm

:shock: :shock: :shock:

I finally get it, I think! The female part is attached to the bolt!

I was thinking the male part was for some reason...

And to be honest, I haven't entered my basement since I posted that... :D
  • 0

POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name :D
User avatar
ramses
Major General
Major General
 
Posts: 1679
Joined: Thu May 29, 2008 6:50 pm
Reputation: 3

Unread postAuthor: iknowmy3tables » Wed Mar 03, 2010 8:27 pm

wow did something happen to the gas piston since the last video, cause it looks pretty stiff but in the last video that thing was moving pretty well,

traditionally I've thought that gas pistons in most spudguns would not have enough pressure, I mean we've had enough plenty of trouble with developing hammer valve blow-backs.

is the bolt lock made with some sort of quick disconect

that's how a snap valve works, does it have resetting problems, JSR said the key to making the popet type valve work was to have the port open when the piston was closed
  • 0


iknowmy3tables
Major General
Major General
 
Posts: 1558
Joined: Fri Dec 15, 2006 3:57 pm
Location: maryland
Country: United States (us)
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Thu Mar 04, 2010 12:35 am

Most people would have gone for a rotating bolt and toggle but noooo, Brian just has to be different :roll: brilliant idea though :)

we've had enough plenty of trouble with developing hammer valve blow-backs.


HPA and a fast valve is what makes it work :)

JSR said the key to making the popet type valve work was to have the port open when the piston was closed


It will work in that configuration if the piston is a relatively loose fit.

Come on, let's see a mag dump with this beast :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

Sponsored

Sponsor
 


Unread postAuthor: MrCrowley » Thu Mar 04, 2010 12:37 am

Pfft...you think that's hard? Try building a hybrid... :roll:


KIDDING! Holy f'in sh|t on a stick this thing is coming together nicely :D
You've done a great job making everything look great and work great, guess you got lucky with a few bits and pieces that happened to be the right diameter/length/whatever but this is still one heck of a build.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: Brian the brain » Thu Mar 04, 2010 3:45 am

is the bolt lock made with some sort of quick disconect


If it were I would have told you about it somewhere in this thread...Eventhough people don't read that sorta stuff..

that's how a snap valve works, does it have resetting problems, JSR said the key to making the popet type valve work was to have the port open when the piston was closed


Yes..I find it difficult to fire even one shot as can be seen in the very problematic video... :roll:

:D ..not..

JSR was using an airspring perhaps?
As good as that sounds, it brings friction into play...at least I could not get my airsprung snapvalve to work properly.Too bad, it seemed ideal in theory.

relatively loose fit.

It slides but forms a 90% seal without O-rings..correctemundo...

cause it looks pretty stiff .

Ehmm...thank you..? :?

It has a pretty beefy spring..plus I needed to knock open the lock, while holding a camera.And I just had an accident a week ago injuring my left schoulder and forearm...You should be thankful I'm a crowdpleaser..
:D
I have no doubt the ram can unlock the bolt..


Come on, let's see a mag dump with this beast


Let me build it before I dump it.. :wink:
I'm just as impatient as the lot of you...
  • 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 » Thu Mar 04, 2010 4:28 am

JSR was using an airspring perhaps?
As good as that sounds, it brings friction into play...at least I could not get my airsprung snapvalve to work properly.Too bad, it seemed ideal in theory.


The crucial point is as follows, if the piston seals over the exhaust port and needs to travel further to reach the seat and reseal the valve, it will never reseal because incoming pressure will push it back et voila, une machine flatulences :roll: However if your piston is not airtight, air can still flow past it into the exhaust port as it's returning at it will "pop" as long as air is supplied to the chamber.

In the case of this valve for example, the piston is not airtight so port position was not as critical:

Image

You should be thankful I'm a crowdpleaser...


Clearly, since:

Brian the crowdpleaser wrote:Something comes over me and stuff just falls into place


Sounds a bit messy but hey, it works ;)

:D :D :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: django » Thu Mar 04, 2010 4:36 am

HA,HA,HA,HA this thing is freakin awesome!!!, looks great and sounds mean as hell,I expect performance will be something to marvel at!?.

If I understood how it worked, Id start on one myself :roll: im too retarded to work it out even with all the info provided, I'll keep looking until I understand!.I allways have problems here sourcing up matching parts for construction of Airguns though ie Barrel to Ammo, Sleeves to O- rings etc hooray for Australia.

Anyways mate great work, I love it........
  • 0


django
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 410
Joined: Sat Feb 12, 2005 11:33 pm
Location: Australia
Reputation: 0

Unread postAuthor: Brian the brain » Thu Mar 04, 2010 4:53 am

Sounds a bit messy but hey, it works


Yak!
:D

im too retarded to work it

I've had all the stuff to build it for quite some time..I just never saw it.

performance will be something to marvel at!?.


That's....unknown at the moment...
Thank goodness the snapvalve is adjustable...
  • 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: MrCrowley » Thu Mar 04, 2010 4:57 am

I have to try make me one of those snap valves. Bought some hydraulic fittings pretty cheap today, hopefully they will come in handy. Heard about a deal for a big CO2 tank as well I might take up (tank holds 6kg of CO2, tank, adapter and regulator for $200 and refills $10).

Hope you're not too busy over the weekend, would be good to see some more progress on this gun ASAP :P
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: jackssmirkingrevenge » Thu Mar 04, 2010 5:07 am

django wrote:If I understood how it worked, Id start on one myself :roll: im too retarded to work it out even with all the info provided, I'll keep looking until I understand!


Come on, it's easy!
  • 0

Attachments
pnushnikovfornonfrogeaters.gif
alternativeconfig.gif
edit: Brian, couldn't you have saved yourself the hassle of a locking bolt by using a sleeve?
alternativeconfig.gif (17.8 KiB) Viewed 1095 times
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: Hotwired » Thu Mar 04, 2010 5:34 am

Morning spudders,

Love the use of the quick release Brian, I've tried for a long time to design a simple latching but also easily opened bolt.

Something off the shelf is far easier to get installed and if it wears out you're not spent hours building a new latching mechanism.

Especially pleased because it doesn't have to bash against the main body of the cannon to lock or release because if damage or wear starts affecting it, the body is more of a pain to replace than a self contained bolt unit.
  • 0

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

PreviousNext

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'