Pneumatic Arsenal 2" to 3/4"

Just build a cannon and want to show it off? Post it in here.

Postby userjjb » Thu Sep 21, 2006 11:06 pm

I humbly present to you ladies and gents my (mostly) complete arsenal of spud-chucking-mayhem.

First up is my 2" barrel-sealing pneumatic. It has a 2 foot by 3" chamber and a 1.5" female adapter outlet which normally mates with my 10ft long SDR 21 1.5" golf ball barrel. It is piloted by a 3/4" QEV which in turn is piloted by a blowgun. Filling is through a male disconnect with a ball valve in place to control fill speed and to prevent firing when the air source is removed.
<div align="center">
<img src="http://www.spudfiles.com/uploader/uploadFiles/2inchFULL2.jpg">


<a href="http://www.spudfiles.com/uploader/uploadFiles/2inchPILOT1.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/2inchPILOT1mini.jpg"></a> <a href="http://www.spudfiles.com/uploader/uploadFiles/2inchPILOT2RR.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/2inchPILOT2mini.jpg"></a> <a href="http://www.spudfiles.com/uploader/uploadFiles/2inchPISTONsideRR.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/2inchPISTONsidemini.jpg"></a> <a href="http://www.spudfiles.com/uploader/uploadFiles/2inchPISTONtop.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/2inchPISTONtopmini.jpg"></a>
</div>
You can see from the other pictures a more detailed view of the pilot side and the 2" piston, which is made from Ultra-High Molecular Weight Polyetylene (UHMWPE) with a 1/8" thick neoprene sealing face kept in place with a fender washer and a 2" metal screw. UHMWPE has a co-efficient of friction comparable to teflon and is 10 times more impact resistant than bullet proof glass.
According to GGDT this should put a properly weighted golf ball half a mile out. The only time I've recovered a golf ball from this was an un-weighted one at 20 psi, that was found 500ft out.


Next we have my 1 1/4" barrel-sealing pneumatic. It has the equivalent of a 2 foot by 2" chamber and a 3/4" female adapter outlet which normally mates with my 10ft long 3/4" barrel. It is piloted by a simple 1/4" ball valve. Filling is through a male disconnect with a ball valve in place to control fill speed and to prevent firing when the air source is removed.
<div align="center">
<img src="http://www.spudfiles.com/uploader/uploadFiles/1QinchFULL.jpg">


<a href="http://www.spudfiles.com/uploader/uploadFiles/1QinchPILOTRR.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/1QinchPILOTmini.jpg"></a> <a href="http://www.spudfiles.com/uploader/uploadFiles/1QinchPISTONtop.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/1QinchPISTONtopmini.jpg"></a> <a href="http://www.spudfiles.com/uploader/uploadFiles/1QinchPISTONside2RR.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/1QinchPISTONside2mini.jpg"></a>
</div>
You can see from the other pictures a more detailed view of the pilot side and the 1 1/4" piston, which is made from two 3/4" end caps, some 3/4" pvc pipe, and part of a 3/4" coupler. The sealing face is 1/16" thick neoprene with a 1" metal screw and a fender washer to hold it in place.
This launcher is tons of fun to goof around with. It's quick to pump up with, seals perfectly, and has a comfortable stock thanks to the "L" shaped chamber. I've managed to shoot steel spikes through 1/4" steel plate with this.


Next up is the smallest barrel-sealing pneumatic launcher I can make unless I order some 1/4" PVC, a 3/4" one. It has a female threaded tee that can connect to either my 2ft or 6" long 1.5" chambers. The outlet is a 1/2" female adapter which normally mates with my 10ft long 1/2" barrel. It is piloted by the male disconnect (it fires when I remove the air source, although I may add a 1/4" ball valve), which I also fill through. Also pictured is the bike pump I use to fill when not near a compressor, and the handy schrader/female disconnect adapter I made.
<div align="center">
<img src="http://www.spudfiles.com/uploader/uploadFiles/3QinchFULL.jpg">


<a href="http://www.spudfiles.com/uploader/uploadFiles/3QinchPISTONside2.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/3QinchPISTONside2mini.jpg"></a> <a href="http://www.spudfiles.com/uploader/uploadFiles/3QinchPILOTRR.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/3QinchPILOTmini.jpg"></a> <a href="http://www.spudfiles.com/uploader/uploadFiles/3QinchPISTONtop2.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/3QinchPISTONtop2mini.jpg"></a>
</div>
You can see from the other pictures a more detailed view of the pilot side and the 3/4" piston, which is made from nothing more exotic then a cut-down magic marker with a small circle of 1/8" thick neoprene, a small washer, and a 1" metal screw. The right most picture shows just how small the piston is.
This little launcher was built just for the heck of it, but works suprisingly well. It can launch nerf darts like nobody's business, and takes a whole 5 pumps to get to 120 psi with the smaller chamber on.




Starting to get bored yet? Hope not because here's my next launcher, I call it the X1. It is essentialy a 3/4" bore, triggered burst disk launcher. It also has a 3/4" threaded tee that normally is connected to my 2ft by 1.5" chamber. I first fill the small pilot area between the burst disks to half the intended chamber pressure, then fill the chamber to working pressure. When the pilot tee's ball valve is opened it vents the pilot area, bursting first the chamber side burst disk, then the barrel side burst disk, firing the projectile.
This launcher could also be used as a hybrid for 2x mixes by removing one of the unions. Also pictured is one of the two 2" unions I have that I hope to put to some nefarious purpose soon.
<div align="center">
<img src="http://www.spudfiles.com/uploader/uploadFiles/3Qburst.jpg">


<a href="http://www.spudfiles.com/uploader/uploadFiles/3QburstDETAIL.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/3QburstDETAILmini.jpg"></a>
</div>


Finally I have here my (now defunct) first pneumatic launcher. It has a 3ft by 3" chamber and is valved by a 1" Rainbird sprinkler valve which has been modified to be piloted by a blowgun with a 1/4" ball valve for a safety. The blow gun and the brass tee on the chamber containing the pressure gauge and male disconnect have since been recycled. Everything is pressure rated except the 3"-1.5" bell reducer, which I wasn't aware when I built it was DWV. I could put in a pressure rated bushing and coupler, but it's not really worth it. I'll probably chop off the reducer side of the chamber and reuse it on another launcher.
<div align="center">
<img src="http://www.spudfiles.com/uploader/uploadFiles/SPRINKLERdefunct.jpg">


<a href="http://www.spudfiles.com/uploader/uploadFiles/SPRINKLERdefunctDETAIL.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/SPRINKLERdefunctDETAILmini.jpg"></a>
</div>


Here are a couple random pictures showing my barrels, my schrader/female disconnect adapter, my workspace, and finally an old nautical horn that runs off of compressed air. I normally connect it to my defunct sprinkler launcher's chamber for a source of air, it's LOUD.
<div align="center">
<a href="http://www.spudfiles.com/uploader/uploadFiles/2inchTO3Qbarrels.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/2inchTO3Qbarrelsmini.jpg"></a> <a href="http://www.spudfiles.com/uploader/uploadFiles/SCHRADERadapter.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/SCHRADERadaptermini.jpg"></a> <a href="http://www.spudfiles.com/uploader/uploadFiles/workspace.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/workspacemini.jpg"></a> <a href="http://www.spudfiles.com/uploader/uploadFiles/AIRhorn.jpg"><img border="0" src="http://www.spudfiles.com/uploader/uploadFiles/AIRhornmini.jpg"></a>
</div>


I say this is my mostly complete arsenal for two reasons. First, I plan on building more launchers, a 4" piston pneumatic like Rmich's, a hybrid, and perhaps a 6" piston pneumatic if it proves feasible. Second, I also have a metered-propane combustion launcher with a 2ft by 3" chamber that has a 1.5" female threaded outlet. It's not shown here because it still is over at my friend's house. Once I get it back I'll be sure to update this post. Please, some comments would be much appreciated.

(Boy that was a long post, but I figured it would be better then making 5 new separate topics.)
userjjb
 
Posts: 66
Joined: Fri Jul 07, 2006 1:58 am
 

Postby markfh11q » Fri Sep 22, 2006 5:24 am

Holy Fishcakes you have a lot of barrel sealers!

All nice launchers. Congratulations! If there was a volume award, I would give you it.
markfh11q
 
Posts: 967
Joined: Sat Mar 11, 2006 4:40 pm
Location: USA
 

Postby SpudStuff » Fri Sep 22, 2006 11:15 pm

Alright i got lost after the 3rd one. How about a topic for each.
SpudStuff
 
Posts: 789
Joined: Sun Nov 20, 2005 2:06 am
Location: USA
 

Postby sgort87 » Sat Sep 23, 2006 12:25 am

Very nice. I love the classy "purple primer paint job". I barrel sealers are great. Good work dude.
sgort87
 
Posts: 2062
Joined: Thu Sep 08, 2005 11:59 pm
Location: USA
 

Sponsored

Sponsor
 
 

Postby BC Pneumatics » Sat Sep 23, 2006 1:30 am

DWV....
BC Pneumatics
 
Posts: 2391
Joined: Wed Dec 10, 2003 2:29 am
Location: USA
 

Postby markfh11q » Sat Sep 23, 2006 6:49 am

Only his first one.
markfh11q
 
Posts: 967
Joined: Sat Mar 11, 2006 4:40 pm
Location: USA
 

Postby SpudStuff » Sun Sep 24, 2006 5:50 pm

and the last one...
SpudStuff
 
Posts: 789
Joined: Sun Nov 20, 2005 2:06 am
Location: USA
 

Postby markfh11q » Sun Sep 24, 2006 5:55 pm

I meant the first one he made, not the first one in the post. The first one in the post is pressure-rated.
markfh11q
 
Posts: 967
Joined: Sat Mar 11, 2006 4:40 pm
Location: USA
 

Postby sgort87 » Sun Sep 24, 2006 10:08 pm

It seems none of you actually read it. He says flat out he used DWV because he didnt know at the time and he now doesn't use that launcher.
sgort87
 
Posts: 2062
Joined: Thu Sep 08, 2005 11:59 pm
Location: USA
 

Postby userjjb » Sun Sep 24, 2006 10:38 pm

Sgort hits the nail on the head, all the cannons in the topic use pressure rated parts with the exception of the last cannon in the topic, which was the first cannon I made. Everything on that cannon is pressure rated except the reducer, I no longer use that cannon.

Please before you try to critique my cannons, look closer at the text. I realize I don't have 2000 posts, but that doesn't automatically make me a noob, I just believe in quality posts over one liner responses, or single word responses...
userjjb
 
Posts: 66
Joined: Fri Jul 07, 2006 1:58 am
 
 
Next

Return to Finished Cannons

cron