"AA" Coaxial Piston

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
User avatar
)DEMON(
Sergeant 4
Sergeant 4
Posts: 1391
Joined: Sun Mar 12, 2006 1:22 pm
Location: Johannesburg South Africa

Tue Jul 18, 2006 11:56 am

Get a reducer and cut it into sections then glue at least three of those around the barrel. I call that a barrel stabelizer. My piston cannon also needs a bit of work, all I have to do is move the piston back and get a longer barrel.
Forever dreaming...
User avatar
SpudStuff
Sergeant 5
Sergeant 5
Posts: 1410
Joined: Sat Dec 10, 2005 3:55 pm
Location: Cupertino, California
Contact:

Tue Jul 18, 2006 12:07 pm

home depots don't carry neopreme but for a small gun you can look in the faucet scection for repair parts. get rubber disks fith the hole in the center
User avatar
frogy
Corporal 2
Corporal 2
Posts: 603
Joined: Mon May 29, 2006 1:24 pm
Location: Ohio

Wed Jul 19, 2006 9:55 am

I can't find 1" to 1/2" reducers at Home-Depot, I guess I'll have to go to Lowes to get thoose and maybe Neopreme....

I though about using 1" to 1/2" reducers, but I'd have to butcher them for it to work, I'd have to take out the stop on all of them, and take off the flush park so it'll slide in the 1", and then I'll have to drill holes in it so my whole chamber will be used, but how would I be able to keep them in place?
-FrOgY-

I wish people would stop needing a better signature!
User avatar
LucyInTheSky
Specialist 2
Specialist 2
Posts: 293
Joined: Fri Apr 21, 2006 11:46 am

Wed Jul 19, 2006 10:12 am

How did you heat up all that glue? Blow torch?
User avatar
frogy
Corporal 2
Corporal 2
Posts: 603
Joined: Mon May 29, 2006 1:24 pm
Location: Ohio

Wed Jul 19, 2006 5:09 pm

All that glue? lol, it's only about 2 in² (~33 cm²)

It's about 2.5" (6.35 cm) that's close to 1.033" diameter because it seals in 1" pipe great...

I used about 2 and a half glue sticks that I melted with a glue gun into 1" pipe cut to about a 3" length with a few layers of magazine taped to the bottom and the inside lubed with some Cooking Spray not Olive oil like someone thought...

You want to Mold about the whole 3" and then cut-off the ends because there a little un-even, and I sanded mine with 320 grit sandpaper on the ends...

Note:
If you make this piston for 1.25", 1.5", 2", or 3" you'll want to make the piston longer accordingly, so you don't have a 3" piston that's 2" in length which would be unstable moving in the pipe, so if your making a 3" piston, make it atleast 5" in length...
-FrOgY-

I wish people would stop needing a better signature!
User avatar
spudkpi
Specialist
Specialist
Posts: 135
Joined: Tue Aug 01, 2006 8:52 pm

Wed Aug 02, 2006 12:33 pm

The glue piston on this thing has given me many ideas... thanks.
Post Reply