I want to build my own extremely high pressure homemade water gun. It might double as a pressure washer or a water cutter one day. PVC will be way too weak. Do you think galvanized pipe is a good choice for this application? Where can I find high-pressure valves? Will brass do the trick?
Homemade water gun
- Thread starter kevinthenerd
- Start date
even with a gas motor, it's not powerful enough, and the nozzle is usually too large for use as a water cutter
Wow, a water cutter runs at 60000-80000 psi. I have a long way to go to get that kind of pressure.
Edit: At 200 micron diamater with mach 3, you're using only a half a gallon per minute.
Edit: At 200 micron diamater with mach 3, you're using only a half a gallon per minute.
How skilled are you?
You do realize under that much pressure, if you fvck up on your design, you're going to be carted off in a body bag, right? Well at least what pieces they can find of you.
You do realize under that much pressure, if you fvck up on your design, you're going to be carted off in a body bag, right? Well at least what pieces they can find of you.
No doubt. It would blow up the building. If I fvck up a design as a professional engineer later, I'd rather it be my own life than the life of someone else.
It's amazing to think that, for safety and fatigue longevity, systems like that have to be designed to withstand more than 100000 psi. That's simply crazy to me.
You're determined to die in a blaze of glory aren't you? PSU welder, Race car made from galvanized fence rail, now this.
look into some of the materials used to construct "Potato Canons"
They are usually designed for high pressure in mind
They are usually designed for high pressure in mind
Hell yeah. QFT.
For the record, I gave up on the welder and bought one. If and when I decide to build a race car chasis, I'm going with DOM tubing or maybe chrome-molly.
are you looking at something you can hold? cuz galvanized pipe gets pretty damn heavy at higher diameters.
When I first learned about synthetic diamond production, the first thing that came to mind was making an engine block out of it. It has the highest thermal conductivity of any pure substance (ignoring what they're doing these days with two-phase flows), and it's strong.
The trouble comes when you have an unexpected load (like a back fire or something). A metal will simply yield, but it will more than likely hold. A brittle material is all or nothing. There's no warning if it's about to break.
Diamond is obviously too expensive and impossible to work with. I don't have a laser cutter (yet).
I held a 10' piece of 2" ($50 at Home Depot) when considering my last project's materials. I had a hard time holding it. (It was the thickest they offered in the size.)
Originally posted by: Drakkon
ahhh spring...
that time of year when a young mans fancy turns from that of sitting by the fire....
to cutting down friends with highly pressurized water
Well, if fire is on your mind, I could always fill it with gasoline or something, but I'd have to work up a bit more courage to pressurize gasoline in a homemade water gun.
Edit: Google the video of the homemade flame thrower that uses windshield washer concentrate, which I believe is methanol.
Originally posted by: MaxDepth
Well, hell, son. If you got your mind on things like that then...
I need something like a combination BBQ wood smoker and pressure cooker. I want to smoke a 12 pound butt in under 3 hours.
I know a good welder who's a total artist of steel. He made himself a VERY nice looking smoker. I wonder if I can look him up. (He's my uncle's friend, and I haven't talked to him in a long time.)
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