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 52 users online :: 4 registered, 0 hidden and 48 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

CBHV: Masterclass entry

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: jackssmirkingrevenge » Wed Aug 31, 2011 6:37 am

Brian the brain wrote:Get the machinery


I already has it ;)

Added to that as a birthday present I'll be getting myself a dedicated table and motor for the mill, so I don't have to disassemble it every time and give me a bigger working range, plus probably some other little gadgets...

So yeah, no excuses ;)
  • 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 » Wed Aug 31, 2011 9:10 am

I could really use a mill...
But I'll have to get it done with a lathe, welder, various taps and dies, powerdrill handtools etc...poor me :D

I'll go and weld on the "T" transfer port up on the main tube tonight if I get a chance.

Wifey's pretty sick a.t.m. so I might be up all night tending to her and spudding will have to wait. :cry:

Oh..I wanted to get an idea of the power...so I put a marble on top of the port and tapped the valvestem.
The marble hit the ceiling.
Is that a good sign?
Not sure, at least I know it can propell something :wink:
  • 0

Last edited by Brian the brain on Wed Aug 31, 2011 10:02 am, edited 2 times in total.
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: warhead052 » Wed Aug 31, 2011 9:51 am

BTB, This is going to the competition right?
  • 0


warhead052
Major General
Major General
 
Posts: 1769
Joined: Mon Mar 21, 2011 5:41 pm
Reputation: 0

Unread postAuthor: Brian the brain » Wed Aug 31, 2011 10:01 am

It's my entry for the challenge, yes.
  • 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: MRR » Wed Aug 31, 2011 10:11 am

Looks pretty awesome so far 8) .

Is that a lever from a window opening mechanism? :shock:
  • 0


MRR
Major
Major
 
Posts: 362
Joined: Tue Feb 17, 2009 2:29 pm
Reputation: 0

Unread postAuthor: Brian the brain » Wed Aug 31, 2011 10:17 am

Yes.
German brand.. :wink:
We sell them at work and it ended up in the bin more than a year ago.
I had recognised it's potential and kept it.

My 16 mm version pump used the same thing.

Seeing how it works well and looks the part...I don't think I was wrong using it.
The current lever handle will be covered by a wooden one.
  • 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: warhead052 » Wed Aug 31, 2011 11:08 am

I just had a idea, since you are going to add a wooden handle to it, why not make it a dragunov SVD pcp? That would be insanely cool, and sleek. Not to mention the power from the barrel length.
  • 0


warhead052
Major General
Major General
 
Posts: 1769
Joined: Mon Mar 21, 2011 5:41 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Brian the brain » Wed Aug 31, 2011 3:24 pm

why not make it a dragunov SVD pcp?

Because I know what I like.. :wink:

Welded on the barrel mount thingy.I seriously need to fill up those trenches with weld and grind it to a mirror finish...but unfortunately I don't have the time today.

I did get to test it with a 6mm I.D. barrel and it breaks up bb's like nothing...
I do get the feeling that anything over 10 mm I.D. will not do any good.

we'll see....
  • 0

Attachments
001.JPG
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 Aug 31, 2011 11:19 pm

Brian the brain wrote:I did get to test it with a 6mm I.D. barrel and it breaks up bb's like nothing...
I do get the feeling that anything over 10 mm I.D. will not do any good.


Big bore or bust, you want at least 50 cal to take advantage of that valve!
  • 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: wyz2285 » Thu Sep 01, 2011 7:36 am

This may sounds stupid, I was think about your valve and it looks like a "hammer" actuate quick dump valve :? so when the hammer open it won´t the piston "dump" and stay open until all the air is gone?
If not I really need to try to build this valve :P
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: LovableAirGuns » Thu Sep 01, 2011 8:58 am

WOW that's coming out really well.
maybe i should do a build log like yours but on mine.
looking forward to more of your build good job man :D
  • 0

User avatar
LovableAirGuns
1st Lieutenant
1st Lieutenant
 
Posts: 267
Joined: Tue Sep 28, 2010 5:58 am
Reputation: 0

Unread postAuthor: Brian the brain » Thu Sep 01, 2011 11:17 am

so when the hammer open it won´t the piston "dump" and stay open until all the air is gone?


I had the same concern when I built it's predesessor.

It is somewhere in the middle of a QDV and a traditional hammervalve.
There is some surface for the pressure to work on, although it's tiny.
Both sides are almost equal.

I can tap the valvestem and it closes immediately afterwards.In that sense it feels just like a regular hammervalve.
I just don't have to hammer it like a madman,..while it has better flow.


So a tapvalve would be a better name for it.
  • 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: wyz2285 » Thu Sep 01, 2011 12:26 pm

Any chance of take a look at the valve stem? and does that bulletcap do anything or just for the look?
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Unread postAuthor: Brian the brain » Thu Sep 01, 2011 2:22 pm

I'll make a picture for you guys tomorrow.

The bulletnose is the airtight cilinder for the counterpiston.
It's hollowed out.
One end had to be blocked off to ensure the low pressure area in front of the piston.
The shape of that side is rounded off to help air flow around it.
That's how I ended up with the bulletnose.

I just tried it with an 11 mm I.D. barrel.
A thick nail and caulktube-tip cut to size served as a dart.

It was pretty cool... :D
At 40 pumps the nail went into solid hardwood from the side ( top of the grain is easier) 20 mm.....I have tried a commercial airgun on that block ( from wich Old Shatterhands' stock was cut) and.177 cal balls made just a dent and popped back out.

The coolest thing is:Absolutely no sound apart from the " dook" of the nail cutting into the wood. :D

I don't really like loud noises...so this is a plus.
Now I can shoot it anytime!
Although a large boom would have re-assured me the valve was doing what it is supposed to... :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: wyz2285 » Fri Sep 02, 2011 4:59 am

The bulletnose is the airtight cilinder for the counterpiston.
I found out that from the beginning :wink:
One end had to be blocked off to ensure the low pressure area in front of the piston.
same as that I thought too, but wasn´t sure so thx :P
The shape of that side is rounded off to help air flow around it.
Nice thought :idea: didn´t think about that.
So the area of the counterpiston is smaller than the seal surface right?
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

PreviousNext

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'