gun barrel

[redneckrobot]

dose any one know ho to make a barrel that is 26" id

55 gallon barrel is to small 60 gallon is to big

cant find abs/pvc pipe in short segments
pleas help

[Whippet]

Does it have to be airtight? Have you considered ventilation ducts?

[Owen Makin]

Are you sure you will be able to produce enough cubic inches of air to launch the ball?

[redneckrobot]

it dose not have to be air tite because it is not a air canon

it is just a barrel

[Whippet]

Well, then, have you looked for circular ventilation ducts in that size?

[redneckrobot]

just looked nothing in that size I can find

[Jibri Wright]

If it doesn't have to be airtight than why not just make one?:rolleyes:

[ChrisArmour]

not sure if the material matters but maybe look around for concrete forming tubes, quick search shows that sonoco makes them in 26in if you can find a place that sells them

http://www.sonotube.com/products/sonotubeconcreteforms/round/sizechart.aspx

[Speeder]

Form it from block wire fence.

[redneckrobot]

thanks

[Matt C]

A piece of material, say 1/16 lexan, cut at 82.68 long and rolled into a cylinder, with a 1 inch overlap (for fastening together) will give you a cylinder with about a 26 inch ID.

[mechlectrician7]

Take your 60 gallon barrel and cut it down one side, take what ever amount you need out of the side then weld the two back together again (assuming you have a welder to use)

[redneckrobot]

very good ideas. I would want to use a plastic barrel so I would have to solvent weld weld it and I don't have the equipment.
I like the lexan idea I had thought something like it earlier with plexiglass but plexiglass is too rigid and the overlap would be a problem. I like that concrete forming pipe idea the best. any other ideas

[Bill_B]

Pardon the insouciance - my first thought on reading the thread intro was "now there's a REAL job for a 3D printer!" :) :rolleyes:

[redneckrobot]

that would be cool if you had a huge printer