Seriously Don't try this at home.

[Hostile]

Oh, I found a way around the California code.

I can use powder, just to test it out I hooked up a paint sprayer (with the filter or whatever inside knocked out) to a compressor and used some coffee creamer powder, got some nice distance with the powder.

Btw, to get in idea of what I am talking about, grab a handful of coffee creamer powder, toss it in the air and light it with a lighter or blowtorch or something.

[frogy]

I don't know if many people know this. But I'm an amatuer Pyro, and I'm quite into the SpudGuns\Pyro field.... I make aerial shells larger than most of you will see at professional shows.

I've made my own Flamethrower similar to this, but I'd like to give you a word of safety advice...

Pressurized Fuel\Ail mixtures are dangerous...

Please, do yourself a favor and keep the Fuel and Oxidizer separate...

Fairly common mistake... People think a propane tank can explode if the flame gets "sucked in" to the tank... Impossible, no oxygen in the tank... no burning...

You can create a large PVC air tank, but you should make a Venuri-type valve that pulls the Fuel into the air stream... Similar to those things you put on garden hoses to pull the fertilizer into the water stream...

Really, there is not a fuel\air mixture in the tank if you do it the way this kid is, but when you're doing pushing all the Denatured Alcohol\Other fuel out of the tank... The tank will be fuel of an Oxygen\Fuel Vapor mixture, which is explosive.... It would probably just fire like a potato gun afterwards, but you may need to change your undies after that....

If you need any further explaination\help, just ask.

PS: Hostile, that is called a "Dust explosion" normally...
The more fat content in the powder, the more explosive the "explosion" will be...

Lamb Milk Replacer makes the best combustion... Lots of fire from a small amount... Also very bright.
There's a pyrotechnics devices referred to as a Cremora 'b'word\Fireball, in which Black powder is placed
at the bottom of a container, and traditionally, Coffee creamer was placed on top of it... Ignited... Big fireball... Cheap...

[Dunno]

Originally Posted by Lusus

We definitely need one of those for our OWS get together. I nominate Moonshine or Dusty...

I can personally guarantee, that anyone bringing one of these to my home will get a beat down..

[RingMaster]

so just a few questions then, what psi is the tank at? and im guessing from the picture the bottom valve is a hose spigot?, just wondering about this cause im currently going to make one, also toying with the idea of tryin to get a trigger instead of the straight shut-off valve

[Akira]

Oh c'mon Dunno, you'd love it. We'd literally bring the house down!

[frogy]

The nozzle is a hoze barb... The "shut-off" valve is called a ball valve.... You can try a Blowgun as the valve, though it may not seal correctly after you are blowing solvents through its rubber parts

PSI Max with Air ranges on the pipes ID (inner diameter)
1/2"...600
3/4"...480
1"......450
1.5"...330
2"......280
2.5"...300 (yes it goes up... increase in Wall thickness at 2.5")
3"......260
4"......220

Note, these are the rated burst pressure of Harvel SCH-40 Pipe...
Make sure you are using no less than SCH-40 (Schedule 40)
NSF-PW (Public Health & Safety [NSF] - Pressure Water [Pressure rated]) pipe.

These are the MAX PSI of the pipes... so you want to be at about half of that... I've never taken my 4" cannon over 150psi (and I'm crazy).

Oddly enough, I have to change my mind... The original design would be great, if you pressured it with Propane instead of compressed air... Though it would be safe with Compressed air, I don't really like the idea of a possible explosion strapped to my back... Please buy a 125 PSI Pop-off valve just in case...

Mcmaster.com should have all of the more exotic parts... though you should be able to find all the pipe in the plumbing section, and all of the Pneumatic hardware in the Air compressor section...

Go with a 3" or 2" tank though, as 4" fitting are just a rip off...

Here's a Pneumatic (air powered if you didn't know) paintball gun I made...


Here's a fancy combustion (burns a fuel\air mixture to push projectile with gases) paintball gun


How about I make a cannon and paint it up with OWS emblems

[RingMaster]

well my idea for the trigger was taking one from a pressure washer and placing that at the back of the gun and elongating it with a forward grip, and those psi are mighty helpful so that i dont seriously mess myself up

[frogy]

Really all you need to do this is 7 parts or so...

PVC Threaded Cap
PVC Male Adapter (cap threads on to)
PVC Pipe
PVC Cap (works, but there's a nicer looking route)
Barbed Hose Adapter
Polyethylene hose (resistant to solvents, another plus)
**(Tygon PVC or Flexible PVC from McMaster bends easier, and is stronger)
**(May be some at Hardware store also)
Blow gun
Hose clamps
Schrader Valve (almost forgot... duh [tire fill valve])
Pressure Gauge
Pop-Off valve (125 psi normally)

You may need a Brass adapters to go from the blowguns 1/4" NPT Female Inlet to the smalle hose adapter.

The nicer looking method that I mentioned above, would be to use a coupler and a Threading Bushing (reduces size of the pipe from a larger "Slip" to a smaller Threaded size)... This will allow you to simple screw in a hose adapter instead of taping (threading by hand\with pipe tap) them into the pipe.

It's normally cheaper to buy all the PVC parts from Home Depot\Lowes, and then order the Blowgun, Gauge, Brass adapters from McMaster.com... Though it matters how much they're charge for shipping (they don't tell you pre-order)... Call them for shipping price.

[frogy]

Can you say "Offical OWS Supersoaker\Pressure washer\Flamethrower"? .... Quite a mouthful, even for Akira



Just needs fuel, hose clamps. and a paint job.... and a back pack... and a pilot light.... You thought flame projectors were easy

Wait for a video...