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 48 users online :: 4 registered, 0 hidden and 44 guests


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

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

marblematic mk 3

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

marblematic mk 3

Unread postAuthor: joe blogs » Fri May 15, 2009 5:39 am

This is my latest installment (made about 4 months ago but wanted to credit it the proper writeup) . the spec are

# 50mm chamber 60cm chamber
#40 mm sprinkler valve
#16 mm,70cm barrel
#High flow sandblasting vent valve.
#zoomable 3-9x40 tasco scope.
#laser sight
#bipod with lipschitz bracket
#machined stainless steel bolt
#pump action loading
#17.5 mm breach
#muzzle break
#machined bracketry, rails and couplings
Btw i fill this gun to about 200 Psi

Yes i know that you will say "you should have used a piston valve" but i had this valve in my shed, it matches my aesthetics and i get decent power out of it.

I painted this gun with a really good, solid finish paint. I hope you can see this with the pics. I didn't paint any a the stainless surfaces naturally because they look so damn good and don't oxidise. I did however paint the steel because the paint reflects the light really well and it fitted into my guns theme.

This gun is probably the last pneumatic i will make because i have solved the problems of all my last guns. http://www.spudfiles.com/forums/my-1st-rifle-t3571.html and http://www.spudfiles.com/forums/svd-pne ... t7871.html

Problem number /solution with this gun
1. When something breaks down the gun is hard to strip down.
This gun strips down quickly because i used pins,bolts and cam locks.
2.Rate of fire was lacking
The high pressure large volume pipe allows for multiple shots, the pump action also allows quick simple loading.
3.I hated having to use wading to seal the marble in tight.
I was lucky enough to find a very rare bit of pipe in my uncles custom machine shop. This pipe was 16mm (standard marble caliber). Two metres of very solid, very straight pipe.
4.The breach loading systems were either having to use wading to prevent the marble rolling out the end or use a system that takes some of the power (blowforward bolt etc).
This was solved when i machined out the breach in the barrel to 17.5mm to allow for a high tensile strip of metal. this strip is welded onto the inside of the bolt to slip under the marble and push it against the roof of the breach. Then when the air hits the marble the strip disengages and allows the marble into the 16mm pipe.
5.Accuracy wasn't all that great on previous versions.
The accuracy was greatly improved (see target pic) by having increased power,precise barrel,solid scope rail assembly and adjustable,adaptable and solid bipod. I also got the weight distribution just right which suprisingly help allot.

The thing i like the most about this gun is how solid my workmanship was. This gun receives a bashing (dropping it on concrete) almost every time i use it to hunt yet it still stays on target and hasn't once leaked or broken down. i once dropped it out of a tree when i was perched on my single plank vantage point. i attribute this mostly to having solid welds and making everything possible metal.


My beautiful marble sniper. Note the spring that pushes the bolt forward when let go and the slip rings which are are holding pins in position, all in the name of the quick strip.
Image


My tropical property, this is a good target shooting vantage point.
Image


Looking a part of the surroundings.
Image


scoped view.
Image


This spread was at 30 metres (at this distance the fine tune windage adjustments came in handy)
Image


Bucket thats getting nailed in video.
Image

[youtube]http://www.youtube.com/watch?v=yPqi26ttZfc[/youtube][/i][/b]
  • 0

Last edited by joe blogs on Sun May 17, 2009 4:26 am, edited 3 times in total.
"The object of war is not to die for your country but to make the other bastard die for his" General S Patton
User avatar
joe blogs
Corporal
Corporal
 
Posts: 67
Joined: Fri Sep 01, 2006 2:02 am
Reputation: 0

Unread postAuthor: Cosmic Muffin » Fri May 15, 2009 5:43 am

nice gun mate.
great work.
  • 0

User avatar
Cosmic Muffin
1st Lieutenant
1st Lieutenant
 
Posts: 275
Joined: Mon Jan 14, 2008 10:30 pm
Location: arse end of nowhere
Reputation: 0

Re: marblematic mk 3

Unread postAuthor: Ragnarok » Fri May 15, 2009 6:52 am

joe blogs wrote:My tropical property, i nail [Censored] from this particular vantage point.

Hopefully not with this cannon - we don't want to hear about that kind of thing on this forum.

But, impressive work either way.
  • 0

Does that thing kinda look like a big cat to you?
User avatar
Ragnarok
Chief of Staff
Chief of Staff
 
Posts: 5339
Joined: Tue Dec 19, 2006 8:23 am
Location: The UK
Reputation: 8

Unread postAuthor: Demon » Fri May 15, 2009 8:41 am

I am so jealous of your shooting range! (the pic when we see trough the scope) I have a very similar sniper with a scope...but i live in town, so i cant shoot really far...
  • 0

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

Unread postAuthor: starman » Fri May 15, 2009 10:31 am

Really clean and detailed design joe....very nice work!
  • 0

User avatar
starman
Donating Moderator
Donating Moderator
 
Posts: 3041
Joined: Wed Dec 12, 2007 12:45 am
Location: Simpsonville, SC
Reputation: 0

Unread postAuthor: far_cry » Fri May 15, 2009 12:29 pm

nice work dude ,i love it
  • 0

ImageImage
User avatar
far_cry
Donating Member
Donating Member
 
Posts: 317
Joined: Wed Aug 20, 2008 3:59 pm
Reputation: 0

Unread postAuthor: POLAND_SPUD » Fri May 15, 2009 2:18 pm

I am not sure if you really need a 9X zoom but the gun looks very good...

is the chamber made from PVC ??

ohh and ->you should have used a QEV :wink:
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Sponsored

Sponsor
 


Unread postAuthor: grock » Fri May 15, 2009 6:11 pm

nice gun. your environment looks very hawaiiish, with a plumaria and mango tree in your range. do you live in hawaii?
  • 0

User avatar
grock
2nd Lieutenant
2nd Lieutenant
 
Posts: 231
Joined: Mon Dec 29, 2008 2:59 pm
Reputation: 0

Unread postAuthor: far_cry » Fri May 15, 2009 9:03 pm

POLAND_SPUD wrote:I am not sure if you really need a 9X zoom but the gun looks very good...

is the chamber made from PVC ??

ohh and ->you should have used a QEV :wink:


i think he will piss off


joe blogs wrote:Yes i know that you will say "you should have used a piston valve" but i had this valve in my shed, it matches my aesthetics and i get decent power out of it.
  • 0

ImageImage
User avatar
far_cry
Donating Member
Donating Member
 
Posts: 317
Joined: Wed Aug 20, 2008 3:59 pm
Reputation: 0

Unread postAuthor: joe blogs » Sun May 17, 2009 4:23 am

Sorry i wasnt aware of the "game" issue i will edit it out. I live on the east coast of Australia and it is fairly tropical here. The scope is ussually set to 5x40 on this pneumatic but i always have the 9x40 option when i put it on my .303.
  • 0

"The object of war is not to die for your country but to make the other bastard die for his" General S Patton
User avatar
joe blogs
Corporal
Corporal
 
Posts: 67
Joined: Fri Sep 01, 2006 2:02 am
Reputation: 0

Unread postAuthor: joe blogs » Thu May 21, 2009 12:45 am

Hey all, I'm in a tight financial spot with my latest combustion cannon. I have decided to sell this marble sniper and an assortment of fittings, pipes and optics. Is there somewhere "spud related" i can make that post?. Would it be alright if i make that post in pneumatic discussion and donate some of the procedes to spud files.
  • 0

"The object of war is not to die for your country but to make the other bastard die for his" General S Patton
User avatar
joe blogs
Corporal
Corporal
 
Posts: 67
Joined: Fri Sep 01, 2006 2:02 am
Reputation: 0

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'