SpudFiles

What kind of machinery do you have access to?

A dremel, a jigsaw, a power drill, a wireless drill and I think my dad still got his old Grinder thing

Then I think you'll have a hard time.

nadjatee1996 wrote:A dremel, a jigsaw, a power drill, a wireless drill and I think my dad still got his old Grinder thing

You have more tools then I do... but you forgot to name one thing.... your Hands!

And your brain.

Brains are a necessity to this hobby. You can manage a lot of JSR's builds with that much hardware I believe. He focuses on two part epoxy casting. It would definitely be something to look into for your build as it doesn't rely on cumbersome fittings. The dremel is a very versatile tool.

Blowguns only cost about 5 dollars. Most high schoolers have that kind of coin (at least I did). It would be smart to simplify your build as much as possible. Keep it simple, do it well, and it will work.

Gaderelguitarist wrote:You can manage a lot of JSR's builds with that much hardware I believe. He focuses on two part epoxy casting. It would definitely be something to look into for your build as it doesn't rely on cumbersome fittings. The dremel is a very versatile tool.

Hear hear, my basic tools are a power drill, vice, files and hacksaw. Epoxy adhesive is a big plus when you don't have access to equipment that can work stronger materials, plenty of information here and here.

Also, why a hammer valve design? There are simpler and more efficient options, such as the valveless/pop-off concept. Here's an example of what it might look like:

He was suggested a hammer valve in the first place. All he's looking for is a compact valve that can be built into a pistol.

Couldn't one use a weaker spring to make that set up effectually semi auto? A priming slide sould mount on the top to load the first shot, the pressure behind the round would then force back the loading piston. I suppose it would need relatively high pressures, as well as a lot of tweaking.

Gaderelguitarist wrote:.Couldn't one use a weaker spring to make that set up effectually semi auto? A priming slide sould mount on the top to load the first shot, the pressure behind the round would then force back the loading piston. I suppose it would need relatively high pressures, as well as a lot of tweaking.

That was the original idea but I couldn't get to function at compressor pressures

I like JSR's concept, but instead of having the magazine on the bottom, I'm going to mod it so it goes on top, any ideas on materials and where I can find a blow gun trigger?Also, while at school today, I was inspired by something I saw, more on that later xD


Also, whats the dots on the barrel?

nadjatee1996 wrote:Any ideas on materials and where I can find a blow gun trigger? Also, whats the dots on the barrel?

If you go by this design, most of it will be epoxy casting and plastic pipe. The blowgun can be bought at a home improvement store. The "dots" on the barrel represent the "detent". It is the part that holds the projectile back until enough pressure is achieved to force it through and out the barrel. I'm sure JSR will be happy to help you on that.

I live in NYC, unless it Home Depot, I dunno where theres another home improvement store, AND, I don;t even have a car

Yeah, you can get them at Home Depot.

No car..lol and parents would never drive me there

The great things about legs is that sometimes they can take you places.

compressor pressures

But you have an HPA tank...

Vincenzo wrote:If you go by this design, most of it will be epoxy casting and plastic pipe. The blowgun can be bought at a home improvement store. The "dots" on the barrel represent the "detent". It is the part that holds the projectile back until enough pressure is achieved to force it through and out the barrel.

Here's what it looked like in real life, before pouring the epoxy:



The "dots" represent the o-rings, which are retained around a mandrel while epoxy sets.

But you have an HPA tank...

Yes, but I was trying to make something anyone could use. The valveless cartridge prototype I made uses essentially the same concept as the above design, and worked perfectly at 800 psi.