I've been bogged down with heaps of homework and paranoid about the school-wide Nerf assassin game I'm in, so I haven't had much time to devote to this project. The purpose of this thread, at least for me, is to bounce a few ideas around people who possess greater knowledge and experience in ...

Wow, its good to see such fast replies, sign of a healthy community

Thanks for the links to the cartridge systems, I've already seen most of them but its good to have 'em all in one place.

The semi-auto design I was thinking of is a modified version of PVC Arsenal 17's TFS-Semi, which also happens ...

Seim-Auto / Side Extractor

http://img694.imageshack.us/img694/7369/sloading1.jpg

This is my design permutation of PVC Arsenal's TFS-Semi mechanism. Its mostly the same thing except it incorporates a spring-loaded retention, er, thing, and would most likely use a non-removable magazine.
Shells ...

My FIRST robotics season just ended, and now I'm itching for a new project. I've always wanted to make a shell-loading airsoft shotgun, and I've been successful enough so far with simple friction-held removable-barrel designs to make me want to improve on the concept. I have my own CO2 with Palmer ...

I've been thinkin of building something like this for a while now, with the ultimate end goal being making one run off of internal propane combustion - and maybe even use it to motorize something if I can get enough horsepower out of it.

But the first step is to make one run off of air, so on that ...

My two cylinders just got in - happy day!

They're two used 1-1/8" diameter 4" stroke double acting air cylinders
I just tested 'em out an they work and seal properly, and are extremely solid. Both are made entirely of stainless steal, and from what I can tell are in top notch condition save for a ...

The suction of the piston pulls air in through the carburator...it's probably not something you'll have to worry about...it happens naturally.

Yeah I figured that part out now, makes me feel like an idiot for not getting it in the first place.

Before I dare to attempt this beast I figure I'll ...

Has anyone ever thought of a homemade 2 cylinder propane-powered engine? My dad's recently reached his 'concerned' stage of his spudding tolerance cycle, so I'm looking to channel my creativity in a less-parentally-disturbing manner, and this is what I've been thinking of lately.


Let me begin by ...

Ordered a Palmer Stabilizer last night, female configuration with 0-300 PSI pressure setting, and even cited Spudfiles.com as where I heard about their product.

Thanks all for your help

W00t for a responsive community!

So will the Palmer act as its own blow-off valve enough to be safe with PVC? Of all safety issues thats the biggest one for me, as with the anti-siphon. Also, are those anti-siphon kits on eBay effective? They look easy enough to make myself out of hardware store ...

Read the title


Okay

My parents have promised me a CO2 system for Christmas, so I gotta get my story straight when I tell them what regulator to get. As the title which I have reminded you to read indicates, the two regulators in question are the Kobalt reg from Lowes for $50 and the beloved ...

Would you mind trying my idea in my first post? I'd love to see if it works or not.

I don't know how soon I can get around to it and I'll have to search my closet for one of them oldschool plastic paratroopers, but I'll give it a shot. Honestly though, I've had bad luck with parachutes deploying ...

Wow. I tried the QEV mod just a moment ago and for once something actually works. Thanks for that one, but theres one more piece to the puzzle - the pilot. What did you use to pilot this beast?

Lastly, does the time spent open for the valve affect the power of the shot? That is, to get more power ...

I threw together a mini-launcher with a 3/4" diaphragm QEV, a foot of 2" chamber, the barrel shown above, and a check valve as a hammer and it was immediately evident that to do this you need a lot more power than that. The string burst though works like a charm if you can actually get the grenade ...

That looks quite possible, though it seems like it would be better just to lob them, holding on to their string, as that way you could control more accurately where they go, or throw them normally if the situation requires it.

Yes but then you don't get the cool factor of having a really loud and ...