SpudFiles

hey, first off I wasn't sure what to call this, and I don't know if this is the right place for it.

Anyway, I had this carboard tube laying around my room and out of curiosity I decided to see if it would fit over the 3/4" pvc barrel for my pneumatic. It slid on perfectly, and fits just right. I took a 1" dowel piece that was originally an old experimental projectile (never used) and stuck that in the end as a nose cone; the fins are just cut carboard hot-glued on.

edit- also, has this been done before?

Pix-

I think the preasure will blow the tube apart before it even comes off of the 3/4'' pvc.

ya, i was thinking that. What pressure do you think it will take before shredding and what would be a good way to reinforce it?

Sticky_Tape wrote:I think the preasure will blow the tube apart before it even comes off of the 3/4'' pvc.

No, it will not blow the tube apart. I have even used those tubes for barrels, and they didnt blow apart.

ok, but has this been done before?

I have tried that with my ½" launcher at 35bar without the cardboard failing.. the results were not impressive in any way, just one of those things you have to try

well, if i have to...

Enamel paint tends to put a nice shell on cardboard tubes, you could also wrap it with tape. Do a search on PVC Rockets, you will learn a lot.

Edit: I voted yes, it will work. Experiment with the pressures, 10psi, 20psi so on.

FishBoy wrote:ok, but has this been done before?

"this" being a projectile over the outside of the barrel? Yes, D_Hall made one that used one of these the toy rockets on a more conventional type gun.


no-limit also made little air powered rocket launchers.
http://www.spudfiles.com/forums/viewtopic,p,173613.html

<a href="http://www.papermart.com/templates/show ... gum_60.jpg">(Water activated) Gum Tape</a> Like pic, Is some nice stuff for making cardboard tubes.
Or cleaning up the electrical tape part (Use it instead)
Just put a layer lengthwise around a dowel or similar after applying water from a sponge.
Or wet it and glue it onto the cardboard tube.
I made a model rocket that way once. Pretty cool stuff. 8)

yeah they are pretty powerful on combustions but ive never tried this on a pneumatic