SpudFiles

My recently completed cannon features on board metered propane injection, stun gun ignition, chamber fan, and an over/under setup.

Specs:

-Chamber is 4" diameter and 15" long
-Barrel is 1.5" x 60" long
-Over/under design
-12v intel CPU fan
-Modified stun gun ignition
-Separate control boxes for ignition and fan controls
-Innovative trigger design made from PVC, pressure switch and a spring
-Metered propane with regulator and quick disconnect safety feature
-Break barrel breech loading ability

The chamber ratio is about .8-1. As you can see in the beginning stages of design, I disregarded the correct chamber ratio and my chamber was wayyy to big so I had to shorten it substantially for optimum power. The chamber is actually 4" DWV sleeved with (3) 4" couplers.

I'm sure most have seen this break barrel design on other cannons ( I cannot take credit for this idea) but I implemented it on this cannon.

I haven't had the chance to test fire it because of the bad weather we've been having but once it gets warmer I'll be able to fine tune the propane and get everything dialed in. I might add a laser sight or something because this thing weighs a ton and it's hard to aim.

Thats about it.. here's the pictures of the cannon and design process.[/i]

Trouble ahead, lady in red! Nice build. What, no video? Come on man, your slacken.

I don't have a video camera!! In my post I said I'm not going to test it out until the weather gets better

looks sweet but dvw chamber? your sure thats safe. otherwise it's a nice gun

carter wrote:looks sweet but dvw chamber? your sure thats safe. otherwise it's a nice gun

It's sleeved with pressure rated couplers.

how many times must we bring up this dwv vs pvc?? dwv is safe on combustions and safe on pneumatics within reason. ...not to ruin your intentions, sleeving it in 3 couplers, will not help a lot, if it fails, it will still fail and rip on the middle of where your couplers join, it might not rip into a million pieces but it will still rip if it wants.

other than that, nice cannon, i like the triggering settup.

DWV vs. PVC?

I'm confused

As far as I know, DWV is simply a sanitation rating. Isn't this just DWV PVC pipe and fittings? Which, BTW, are probably OK on a combustion.

i think he ment ABS.

Very nice work, i would have named it the "Piece" Maker though.
When you say that you shortened the chamber for optimum power, how long was it before? I am of the understanding that a bigger chamber will give MORE power, more noise and less efficiency.

Congratulations... Nice gun and the disign is awesome ;D
Is that ball valve on the chamber removable ?
good job

sorry, i meant dwv vs. pressure rated.

Novacastrian wrote:Very nice work, i would have named it the "Piece" Maker though.
When you say that you shortened the barrel for optimum power, how long was it before? I am of the understanding that a bigger chamber will give MORE power, more noise and less efficiency.

Here's what the chamber was going to be in the early stage of building it. I didn't take into consideration that I need a proper C:B ratio.

nightshot wrote:Congratulations... Nice gun and the disign is awesome ;D
Is that ball valve on the chamber removable ?
good job

Thanks, ball valve is removable yes.

love the perforated propane holder

DWV is completely safe, trust me on this. And man that is a nice cannon. Break barreled advanced good combo

I wouldn't say "completely safe", but for a combustion it's fine. I have quite a few DWV combustions lying around at the moment, and anybody who uses a cleanout plug on a combustion has used "DWV", and needs to come down off their high horse.

I like the whole break-barrel design. Very ingenuitive.