SpudFiles

Insomniac wrote:Somone has just GOT to try this full-size.

It will need to be someone else. I'm not going to be able to bring myself to fully submerse any of these thunder babies in a tank or pool or lake of water. Too much exposed HV and circuitry to go bad.

Wouldn't be too hard though to build a low end version though with a basic piezo spark and none of the frills.

Yeah, it would be a total waste submersing those guns in water, but it would be interesting to have a sorta super-tough version. Just have the chamber, ballvalve and union the same, have the little connector you use to meter it, but don't have a fan, and have a couple of longish, insulated leads running to the electrodes of a stungun. If the point where the wires connect to the screws that act as the spark gap inside the gun were covered with epoxy or somthing, it would be completely waterproof and be able to be fired a few feet underwater (or however long the leads are. Any idea how long you could make the wires leading directly from the stungun output to the gun?)

It would also be very interesting to see a burst disk fired a foot or so underground.

This is really late for this post, but i'm pretty new here and wanted to say that this is some extremely clean work with a lot of intelligence put forth into the design. As clean as clean can be, and the colors are great as well! Very Inspirational. Oh...and THREE of them??? Thats just a lot of work right there, and the fact that you didn't get impatient (at least not noticeably) and cut corners is very impressive. Awesome job making something truly badass out of simple pipe and electronics.

INSANE. It is so clean looking! I am using high pressure fuel automotive fittings and lines for my meter system but other than that our cannons are nearly identicle. great work! A++

i love your design as you have noted i based my cannon off of it. The hidden electronics, the intergraded handle, the very clean spark strip.

DAMN!This cannon is beautiful! Haven't seen too many noise cannons on here but this one takes the cake! I like how you used a nice clean design, and it doesn't look bulky either. again, nice job!

In the pictures with the 2 different barrels, what kind and size of pvc are you using for each?

Damn! That's one fine cannon.

Did you chrony it? I've never seen a golfball shot that fast before.

talknspud wrote:In the pictures with the 2 different barrels, what kind and size of pvc are you using for each?

In the still photo, one barrel is a 1.5" pvc breach loading spud shooter with a 2" male camlock epoxied on to it. The other barrel is an SDR 21 1.5" sleeved in sched 80 2" for golfballs.

The barrel you see in the shooting video is also a 78" long sleeved SDR 21 golfball barrel with a female camlock so as to accomodate my burst disk coupler.

suburban spudgunner wrote:Did you chrony it? I've never seen a golfball shot that fast before.

And with a 1X combustion to boot.... The burst disk makes all the difference! No chrony but I've ran it extensively through HGDT. Also, audio wave measurements of the shot roughly confirm the speed.

Sorry about the noob questions but what do you mean it is sleeved?

A slit is cut lengthwise through a piece of pipe, and that is shoved into another one. This is to create an extra strong barrel, with a new inner diameter, allowing for specific ammo to be shot.

Actually, this barrel is a single piece of 1.5" SDR21 (perfect for golfballs) slid and cemented into a single 2" sched 80 pipe....the fit is perfect. Once I found the joys of SDR21, I didn't fool around with slitting 2" sched 40 any longer.

OK, I was able to go out and get some distance shooting done today. My son and I communicated by cell phone while I shot and he ducted behind his truck trying to spot the landings. He could hear them land but this was the only one we could actually find.

Yes, it did come up a good deal short of 1/2 mile....



...but a 690 yard golf ball shot ain't bad for a 1x combustion.

Nice. How did you find the ball, or at least exactly know where it landed?

Nice distance there. I actually planned on measuring this way with my advanced combustion (well a couple more weeks then it'll be finished).

Do you own all that property or do yours neighbors allow you to fire over there houses? haha I know mine wouldn't.