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 87 users online :: 4 registered, 0 hidden and 83 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Paintball Sniper, Sleek and Powerful

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

Paintball Sniper, Sleek and Powerful

Unread postAuthor: K-Dawg- » Sun Jun 21, 2009 1:40 pm

This is my latest creation. It is a fairly simple sniper derived from a conglomeration of various designs on the site. The gun features a typical 1" orbit sprinkler valve (blowgun modded), a poor man's breech, and a 10x optical scope. The chamber is made of 2" pvc which is reduced down to 1" for the elbow and tee, then finally down to 3/4" for the barrel. The stock is also made of 3/4" pvc and is blocked for safety. My goal was to create a powerful yet very safe gun that looked clean and professional, therefore all parts of the gun are made on nsf-pw fitting, schedule 40 pvc, and the gun was finished in matte black paint. According to ggdt it is capable of shoot a paintball at about 650 fps. Primary ammo includes: paintballs, marbles, "c" batteries, "aa" batteries, and bolts.

Image

Image

Image
  • 0


K-Dawg-
Private
Private
 
Posts: 18
Joined: Sun Jan 01, 2006 7:15 pm
Reputation: 0

Unread postAuthor: ckman » Sun Jun 21, 2009 1:46 pm

nice very clean you defiently did your research good job amaizing looking gun.
  • 0

User avatar
ckman
Sergeant Major
Sergeant Major
 
Posts: 181
Joined: Sun Aug 03, 2008 11:00 pm
Reputation: 0

Unread postAuthor: K-Dawg- » Sun Jun 21, 2009 1:51 pm

Thank you for your kind words, this is my second gun but my first sniper. I am considering adding a propane fill to it so i don't have to lug around my air compressor or bike pump, but I'm having trouble calculating whether or not I'd get a decent amount of shots or not because the ideal gas law does apply due to the fact that the propane is stored as a liquid. Is there anyone who can help. Everything I've googled has been over my head.
  • 0


K-Dawg-
Private
Private
 
Posts: 18
Joined: Sun Jan 01, 2006 7:15 pm
Reputation: 0

Unread postAuthor: DinerKid » Sun Jun 21, 2009 1:54 pm

Nice looking gun looks similar to my current project. What is the actual definition of sniper cannon cause it is tossed around quite a bit and i have yet to see what makes a sniper and what doesn't.
  • 0


DinerKid
Corporal
Corporal
 
Posts: 67
Joined: Fri Aug 29, 2008 6:21 pm
Reputation: 0

Unread postAuthor: Ragnarok » Sun Jun 21, 2009 1:59 pm

DinerKid wrote:What is the actual definition of sniper cannon cause it is tossed around quite a bit and i have yet to see what makes a sniper and what doesn't.

There is no strict definition. Some people will tell you that it shouldn't be used at all, because a sniper is the person, not the rifle, and that it's nowhere near accurate enough anyway. Some don't care.

About the only consistency is that it tends to mean that it's fired with a reasonably direct trajectory at targets rather than going for lobbed distance shots.
  • 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: noob of noobs » Sun Jun 21, 2009 2:11 pm

That looks beautiful!
If you know the MASS of the propane in your tank, you can probably find the moles of propane, thereby finding the total amount of propane you have. Using the ideal gas law you can probably find the total number of shots you can get. I think this'll work, but there are also additives that make the propane smell. I think the mass recorded on the bottle though is the mass of just propane, and even if the additives are in the mass, they're probably negligible.
In case you didn't know, propane has a cooling effect when it vaporizes, so it's probably not a good idea to let the liquid flow into the gun directly since it's PVC. Propane also preforms worse than air since it's dense, and you can't get as high pressures due to its vapor pressure. I myself am working with propane as a pneumatic source though, and I think that with your chamber it should work decently well.
Also, if you can, I'd recommend upgrading the barrel to schedule 80 PVC since it fits PB's better. Menards carries it I think.
Also, if you can you might want to add a barrel support.

Overall though it looks really slick, and VERY proffessional. Nice work!
  • 0

User avatar
noob of noobs
Captain
Captain
 
Posts: 320
Joined: Tue Jun 12, 2007 8:04 pm
Location: Illinois, Skokie
Reputation: 0

Unread postAuthor: K-Dawg- » Sun Jun 21, 2009 3:09 pm

thanks for your help noob of noobs. I already understand the problems of vaporizing a compressed liquid, as i have played paintball for many years. I'll look into calculating the moles of propane, I hadn't thought of that. I guess need to know the weight of an empty propane tank as well as a full one in order to calculate it though. As far as pressure, I hardly ever shoot above 80 psi so propane should provide adequate pressure. My play was to have a portable propane tank in a fanny pack with a regulator and a remote coil going into the gun. Do you have a link to your build? Unfortunately we do not have Menards here in FL, i checked at home depot and lowes but neither had schedule 80. They did however have some sdr pipe. Next time i go I think I'll bring a paintball and test fit various pipes. Between the sdr and cpvc pipe selection there has to be something that fits a paintball better. Once I get a tighter fit I plan on adding hop up as well.
  • 0


K-Dawg-
Private
Private
 
Posts: 18
Joined: Sun Jan 01, 2006 7:15 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Hotwired » Sun Jun 21, 2009 3:16 pm

Ragnarok wrote:
DinerKid wrote:What is the actual definition of sniper cannon cause it is tossed around quite a bit and i have yet to see what makes a sniper and what doesn't.

There is no strict definition. Some people will tell you that it shouldn't be used at all, because a sniper is the person, not the rifle, and that it's nowhere near accurate enough anyway. Some don't care.

About the only consistency is that it tends to mean that it's fired with a reasonably direct trajectory at targets rather than going for lobbed distance shots.


Doesn't even have to be a rifle, marksmen were around before rifling.

I wouldn't call anything here a snipers weapon because what exactly are you doing with it that compares to a sniper? (hiding in the undergrowth because it's illegal where you are doesn't count).

Milplay gets into everything though so call it what you'd like it to be. There are PVC LAW cannons out there and I don't recall ever hearing anything about their poor comparison to the real thing.



Good work on the cannon :)
  • 0

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

Unread postAuthor: geniusbomberman » Sun Jun 21, 2009 5:50 pm

how did you cut the stock off from the rest of the cannon, air-wise?
  • 0


geniusbomberman
Private First Class
Private First Class
 
Posts: 34
Joined: Tue May 26, 2009 6:55 pm
Reputation: 0

Unread postAuthor: K-Dawg- » Sun Jun 21, 2009 6:55 pm

With just a little bit of sanding, a 3/4" cap fits into a 1" Tee
  • 0


K-Dawg-
Private
Private
 
Posts: 18
Joined: Sun Jan 01, 2006 7:15 pm
Reputation: 0

Unread postAuthor: Technician1002 » Sun Jun 21, 2009 8:24 pm

K-Dawg- wrote:thanks for your help noob of noobs. I already understand the problems of vaporizing a compressed liquid, as i have played paintball for many years. I'll look into calculating the moles of propane, I hadn't thought of that. I guess need to know the weight of an empty propane tank as well as a full one in order to calculate it though. As far as pressure, I hardly ever shoot above 80 psi so propane should provide adequate pressure. My play was to have a portable propane tank in a fanny pack with a regulator and a remote coil going into the gun. Do you have a link to your build? Unfortunately we do not have Menards here in FL, i checked at home depot and lowes but neither had schedule 80. They did however have some sdr pipe. Next time i go I think I'll bring a paintball and test fit various pipes. Between the sdr and cpvc pipe selection there has to be something that fits a paintball better. Once I get a tighter fit I plan on adding hop up as well.


Most modern propane fill places fill with a meter, much like a gas pump. In the old days (really old) Propane was sold by the lb. The tank was weighed empty and then the proper amount was delivered to prevent overfilling. Nowdays the overfill and just before that the 10% vapor valve was used to tell when it is full.

The empty tank weight is referred to as the tare weight. The tare weight of many tanks is still listed by the manufacture and is often stamped on the tank. That way you can find the amount in a partially used tank by weight.

Reference below;
http://www.propane101.com/propanecylinderfilling.htm
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: K-Dawg- » Sun Jun 21, 2009 8:42 pm

Thank you very much Technician1002!
  • 0


K-Dawg-
Private
Private
 
Posts: 18
Joined: Sun Jan 01, 2006 7:15 pm
Reputation: 0

Unread postAuthor: Gippeto » Sun Jun 21, 2009 9:26 pm

FYI tech,...It's still sold by the pound in Canada. Topped off my trailer tank yesterday...13 pounds worth. :)

Behind the times or maybe a little backward we is. :lol:

K-dawg, Nice job. Looks like it would be a hoot to plink with. :thumbup:
  • 0

"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
User avatar
Gippeto
Donating Member
Donating Member
 
Posts: 2393
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Unread postAuthor: django » Mon Jun 22, 2009 3:46 am

Nice work,reminds me of my old pnuematics of which I dont use anymore as I too got tired of having to pump up the chamber with a pump all the time! :roll: . Does the breech leak much air,I never had any luck with such feeders as they allways leaked so just muzzle loaded.....
  • 0


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

Unread postAuthor: Technician1002 » Mon Jun 22, 2009 5:48 am

Gippeto wrote:FYI tech,...It's still sold by the pound in Canada. Topped off my trailer tank yesterday...13 pounds worth. :)

Behind the times or maybe a little backward we is. :lol:

K-dawg, Nice job. Looks like it would be a hoot to plink with. :thumbup:


Filling by weight has lost favor in the US. Most Propane is sold by the gallon. Sometimes when there is a problem, Propane gets contaminated by oil. Over time oil can build up in a tank and prevent proper filling using weight. Most Propane is clean, but I had a batch several years ago during a cold spell. The dealer was low, so when pumping liquid, I got a bunch of oil in my fill. It oozed out my torch nozzle and the flame spit yellow streaks, often plugging the orifice. It was long enough ago that the tank did not have an OPD valve. I turned the tank over in a field and dumped it, charged it with a couple more pounds to rinse and dump again. The oil held a large portion of the stench they put in propane.

After the purge and rinse, the tank was good as new. Now before I buy Propane, I always check their gauge so I don't get the floating oil.

Just an FYI for those who buy Propane. Never buy of the end of a tank. Oil floats on Propane and is the last out on liquid delivery. Unless purged, this oil remains in the tank.

I am not the only one who has seen this.

http://www.yarchive.net/car/rv/propane_tank_oil.html

They saw it on a new tank. Bummer. I saw it on an old tank and had no problems for years. The contamination was sudden and attributable to one fill.
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Next

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'