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Thing- Completion!

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: Pyro Ninja » Tue Jun 19, 2007 12:59 am

really cool....nice and clean.....
...good job...where did you get the little pressure gauge...and how much was it...... :)
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Unread postAuthor: experament-u2 » Tue Jun 19, 2007 2:17 am

this gun looks aw awesome
i cant wait for videos and damage picks
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Unread postAuthor: spudthug » Tue Jun 19, 2007 7:43 am

Does home depot sell those micro valves? I don't know how to deal with y QEV's that go off when you disconnect your bike pump.


the bigger ones pilot easier :wink:

...good job...where did you get the little pressure gauge...and how much was it......


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sweet gun pvc!!! i am going to have to make a dart sniper now..i have an extra qev and a sprinkler both 3/4 so i will have to see what one goes better with my design
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4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: PVC Arsenal 17 » Tue Jun 19, 2007 10:34 am

It turns out the the schrader DID vent the gun when I removed the air chuck. I made such a ridiculously small pilot volume, that even the slightest venting of air trips the QEV. There is a trick though- take the chuck off very fast.

It's really no big deal, so I'm not going to change anything. I am going to build a portable propane filler though.

But DAMN this thing is powerful! If a human can send a dart 200fps with lung power, I'm almost scared to see what this blowgun on steriods achieves. Gotta get me a chrono.

I only shot it a few times because I have to seal up a minor leak and make some sort of detents to hold the darts in place. But the shots I did make sunk a 1 inch spike dart into a tree stump, and sunk 2 inches of a 4 inch wire dart into the smae trunk. The half that stuck out was bent and twisted like hell.

Pics:

Image

Image

Much more soon. Promise.
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Unread postAuthor: PVC Arsenal 17 » Tue Jun 19, 2007 3:08 pm

Rmich- I remember a post you made a while back that was something about a 3/4" QEV that was better than Deltrol. What brand was it?

I determined that the small leak is coming from my QEV out the exhaust port. I'll try to fix it but I need another QEV anyway so I might as well buy one.
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Unread postAuthor: experament-u2 » Tue Jun 19, 2007 10:39 pm

PVC Arsenal 17 wrote:I am going to build a portable propane filler though


im working on one for my new gun to so far its working great and lasts alot longer then i would have thought

nice damage what kind of tree is that?
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Unread postAuthor: PVC Arsenal 17 » Wed Jun 20, 2007 11:04 am

I don't even know. It's just some random stump laying in front of my house.
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Unread postAuthor: goathunter » Thu Jun 21, 2007 8:01 pm

How is the flight pattern of the darts?It seems they may be a little light for those speeds.Anyways, looks good.
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Unread postAuthor: PVC Arsenal 17 » Thu Jun 21, 2007 8:10 pm

The spike darts, being the heaviest, fly best. The wire darts are good for close ranges and stun darts are next to useless.
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Unread postAuthor: spudthug » Thu Jun 21, 2007 8:25 pm

i bought a 2 peice 72 inch blowgun with 250 hunting spike darts for 40 dollars today!!!i am going to make a sawed off/sniper since the barrel brakes in half...how did u get urs into the fitting? what size fitting does it fit/screw into?
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4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: PVC Arsenal 17 » Thu Jun 21, 2007 8:32 pm

http://www.spudfiles.com/forums/viewtop ... ee930974e6 57937908b71abbe9906

That should explain it. There are some pictures of the breech parts being pieced together. They go together as shown, with wads of JB Weld. Rock solid...
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Unread postAuthor: VH_man » Thu Jun 21, 2007 8:41 pm

GAA dont make it sawed-off.................. and make sure you have a HUGE peice of plywood as your backing or something so you dont loose those darts. and a link would be nice, i might have to look into that..........
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Unread postAuthor: PVC Arsenal 17 » Thu Jun 21, 2007 8:46 pm

Yeah, configure it so that you can have a stock. Mine is very inergonomic(sp?) without one. Go with a smaller chamber than mine, this one is just too much.

But you'd be surprised, the darts are fairly accurate. And yes, make sure you have a decent backstop to shoot at. Note: don't use your shed.

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Unread postAuthor: VH_man » Thu Jun 21, 2007 8:50 pm

haha. ive found these darts penetrate everything other than steel plates.............. even sheet metal gets poked straight through....... as we just saw with the shed.........
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Unread postAuthor: spudthug » Thu Jun 21, 2007 9:05 pm

vh...the barrel is 2 peices...so its basicall a sawed off when its apart...

is a 34.125 ci chamber
and a 28.8 ci barrel a good c:b ratio??

for a 28.8 ci barrel what would the baest chamber size in ci be?
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Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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