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HD Combustion Cannon!

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Unread postAuthor: Grizzlybear » Sat Apr 05, 2008 4:12 pm

All I can say . . . more tutorials like this one :lol: 8) 8) 8)
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Unread postAuthor: SpudFarm » Sat Apr 05, 2008 5:16 pm

hubb017 wrote:How the hell do you spend $1200 on a hybrid? I can see spending $30 on a cheap combustion, but that is a lot of money on a hybrid. Did you build the thing out of platinum laced with diamonds or something?


5.5" pipe, pressure testing, machined parts (well that was the cheap end) all parts galvanized and money spend on getting it the best way i can.
big propane tank. hydrauc fittings, 2" union and all that stuff.

also take this: i live in Norway and it is sooooo expensive for parts here.
BTW a 2" thickwalled steel pipe 15feet long
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Unread postAuthor: scottcrete » Sun Apr 06, 2008 8:44 am

can you post a pic spudfarm?
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Unread postAuthor: scottcrete » Sun Apr 06, 2008 9:48 pm

My father n law really likes harleys and i am making this one for his birthday.. i didnt have much money to spend on it.. so here are the pics.. let me know what you think..

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after painting
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after painting

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jims gun with decals installed (not completed though)

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more decals.. notice the top of the gun

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last pic of decals installed to this point.. let me know what you think...
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Unread postAuthor: scottcrete » Mon Apr 07, 2008 6:22 am

did you guys miss this? or just nobody has nothing to say?
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Unread postAuthor: scottcrete » Mon Apr 07, 2008 7:37 am

time has passed and still nothing? :(
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Unread postAuthor: SpudFarm » Mon Apr 07, 2008 8:40 am

you posted at 02:37..

and you did a quadripple post!

for pics look at my signature. page four is where the fun begins.
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Unread postAuthor: POLAND_SPUD » Mon Apr 07, 2008 8:48 am

1200$... wow stuff is really expensive in norway...
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Unread postAuthor: SpudFarm » Mon Apr 07, 2008 8:53 am

and even more expensive when you live at the country side
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Unread postAuthor: POLAND_SPUD » Mon Apr 07, 2008 9:13 am

seriously I knew that large galvanized fittings may be expensive sometimes, but not that expensive, How much did you pay for fittings ? do you still remember ?
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Unread postAuthor: SpudFarm » Mon Apr 07, 2008 9:25 am

i have not payed yet.
the chamber and machined fittings is at Larda now.

i just tell that the chamber and caps is going to cost a maximum of $340 not to bad but it is the barrel i have to pay a crap load for.
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Unread postAuthor: D_Hall » Mon Apr 07, 2008 9:44 am

hubb017 wrote:How the hell do you spend $1200 on a hybrid?

Heck, the Pipe Dream will probably cost on the order of $25,000 and I'm using a lot of scavenged materials. If I started from stratch I've no doubt it would be over $100,000.

It's easy to spend money if you're at all interested in scale, precision, and safety margins.
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Unread postAuthor: SpudFarm » Mon Apr 07, 2008 9:50 am

d_hall i try the best i can on all of those areas.
the tricky part for me is getting big enough pipe with the right rating.

how hig mixes will the pipe dream consume?
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Unread postAuthor: pat123 » Mon Apr 07, 2008 10:00 am

good job on the gun.
$1200 :shock: The most I have ever paid for a gun is $70

At most you could have your finger half taken off, or a artery cut open.
At most? :shock: I kinda like my arteries the way they are.
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Unread postAuthor: D_Hall » Mon Apr 07, 2008 7:55 pm

spudfarm wrote:how hig mixes will the pipe dream consume?

It's being nominally designed around a simple 2X. However, one never gets full theoretical pressure so I'll be adjusting the mix until I get about 205 psi, *measured*... If that's 2X or 2.5X or 3X... so be it.
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