Best Design, A or B?

[jd120655]

So i have built a combustion cannon and a few pneumatic cannons before all have been in the style of Design A. My question, are there any advantages to using the U-shape like in design B? Which provides better performance?

Which is the best for a pneumatic cannon using a sprinkler valve? A or B?

Design A


Design B

[PaperNinja]

Ball valves (design A) have a very slow opening time, and in general are going to be inferior to basically any other valve (QEV, hammer, piston, diaphram etc)

[jd120655]

i'm not using a ball valve, replace the ball valve with a sprinkler valve. It was just an example to demonstrate the different shapes.

The question is whether having the u-shape adds anything or takes away anthing. or if its jsut for looks

[PaperNinja]

Oh. I believe any bend will add turbulence=decrease flow, so A might have slightly better performance, but I don't think it's much of an issue.

[jd120655]

ok that's what i thought. Thank you!

[dewey-1]

Here is a better diagram for you to ponder!

[jd120655]

where do you make these fancy pictures? lol.

i think i'm going inline 2' 4" pvc chamber down to 1" for the valve then back to 2" then from there have a female adapter for interchangeable barrels. if there's a place where i can make these images it would help a lot

[jackssmirkingrevenge]

if there's a place where i can make these images it would help a lot

he just cut and paste the diagram you originally posted

Also: http://www.spudfiles.com/forums/modding ... -t305.html

[dewey-1]

Here is 4"x18" Chamber and 2"x36" Barrel for Nerf Pocket Vortex launcher.

[mattyzip77]

Dewey you still make the best sketches!!!!!!

[jd120655]

after some more research i'm definitely modding my sprinkler valve.. i'm hoping to get started on the whole thing today