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Fork in the road here...

A place to ask general spud cannon related questions.
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Fork in the road here...

Unread postAuthor: Blitz » Tue Apr 08, 2008 3:58 am

I've been deciding for a long time, on and off, what to do with this.

Image

It's 6" x 60" -- I found it among some spare pipe somewhere I once worked last year, with epic plans in mind. Meanwhile, I got married and a new job last summer and pretty much forgot about it.

I once had a pneumatic I made with a 6" x 42" chamber and a piston valve I made from a 3" endcap. It was kind of ghetto, but it worked reasonably well with a 2" x 20' barrel. But I discovered chronic leakage around the chamber endcap and coupling (due to my own mistake)... I scrapped it in fear of my safety (After all, 6" PVC sch40 is only rated to 180psi).

So, I've been leaning towards a combustion. I have a pretty much limitless supply of propane gas, making that part cheap. I've also wanted to experiment with a new breech design I've been batting around inside my head recently, which would be unsuitable with a pneumatic (unless I made a chamber-sealing piston valve).

I also have a few 10' lengths of 4" and 3" pipe here, I will likely use 3" for whichever I go for.

So whatcha think, go ahead with the combustion or make a pneumatic again? This will definitely be the largest cannon I've made to date (and the first I've felt was worth posting about since I started posting here again!)

All those fittings are dry-fitted right now. 6" endcap and coupler, 6" socket-weld to 4" female threaded bushing, 4" threaded on one side nipple, and 4" tee.
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Unread postAuthor: XxtriviumxX » Tue Apr 08, 2008 4:06 am

Well sinse you have a limitless supply of propane gas, and a new breech design i think go for the combustion and try something new :) ...

Dont forget to show us some carnage when its done :D
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Unread postAuthor: jackssmirkingrevenge » Tue Apr 08, 2008 4:14 am

Here's a good piece of equipment to have if you plan on forkin' a road :D

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Last edited by jackssmirkingrevenge on Tue Apr 08, 2008 4:30 am, edited 1 time in total.
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Unread postAuthor: XxtriviumxX » Tue Apr 08, 2008 4:29 am

No picture... :(

Edit: Oh wait its working now :D
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Unread postAuthor: jackssmirkingrevenge » Tue Apr 08, 2008 4:32 am

A pneumatic would be more challenging to make, but in my opinion the power benefits and versatility over a combustion would be worth the effort if you made a good enough valve. With larger pneumatics, you can get good power without needing to resort to higher pressures too.
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Unread postAuthor: Jared Haehnel » Tue Apr 08, 2008 6:18 am

I agree with Jack, combustions are great but get old after a few launches unless of course your launching grape fruit...

...pneumatics have a lot more versatility...
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Unread postAuthor: MaxuS the 2nd » Tue Apr 08, 2008 10:53 am

Image


I think that a giant Coax. would be awesome, but as you said..You would like a breech loading system. So yeah, combustion is the way to go.
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Unread postAuthor: scottcrete » Tue Apr 08, 2008 11:09 am

Image

Image

Image


Image

i didnt know what kind of fork in the road you meant man?
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Last edited by scottcrete on Tue Apr 08, 2008 11:14 am, edited 2 times in total.
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Unread postAuthor: jackssmirkingrevenge » Tue Apr 08, 2008 11:13 am

I bet Blitz is really regretting using that expression in the title now :roll: :D
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Unread postAuthor: scottcrete » Tue Apr 08, 2008 11:16 am

can you pour water down the barrel of a pneumatic.. then launch an entire barrel full of water?

if so.. let me see....
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Unread postAuthor: jackssmirkingrevenge » Tue Apr 08, 2008 11:19 am

scottcrete wrote:can you pour water down the barrel of a pneumatic.. then launch an entire barrel full of water?


Definitely, great for clearing wasp nests without damaging your house. Depending on the size of the launcher, mind the recoil though ;)

By the way, it helps if you use a light saboy like a paper cup or similar.
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Unread postAuthor: scottcrete » Tue Apr 08, 2008 11:20 am

i think this guy got screwed by the fork in the road.. what do you think?

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Unread postAuthor: potatoflinger » Tue Apr 08, 2008 2:09 pm

I say that you should make a combustion for launching footballs.
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Unread postAuthor: Maniac » Tue Apr 08, 2008 4:01 pm

No use another six pipe so you can launch midgets.
not
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Unread postAuthor: pizlo » Tue Apr 08, 2008 4:11 pm

Maniac wrote:No use another six pipe so you can launch midgets.
not

Pshhh man be realistic!
8'' baby luncher anyone??
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