| |||||||
| Welcome to the SSC Forums! You are currently viewing our boards as a guest which gives you limited access. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and more. Registration is fast, simple and absolutely free so please, join our community today! If you have any problems with the registration process or your account login, please contact contact us. |
 |
| | Thread Tools |
05-14-2008, 07:36 PM
| #1 |
| Back from the dead.  Join Date: Feb 2005 Location: bay area, CA
Posts: 394
UserID: 345 |  Butterfly valve? I searched it and nothing came up, but i recall seeing it somewhere before. Has anyone used a butterfly valve in a water gun? |
|  |
|
05-14-2008, 07:41 PM
| #2 |
| Administrator  Join Date: Apr 2006 Location: Virginia
Posts: 3,251
UserID: 576 | Re: Butterfly valve? A butterfly valve is basically a ball valve, but instead of a ball with a hole through it, there is a flat disc that rotates about an axle crossing the barrel. The flow will not be very laminar, simply because when the valve is open, that disc is in the middle of the pipe (although it would lie parallel to the flow, it still creates turbulence). Note the disc doesn't rotate like a circle; it would rotate if you used a side view, not a top view. Butterfly valves tend to be common in very large sizes - inches or even feet in diameter. They're probably what's used in Pumpkin Chunkin' contests. I saw one in one of the MythBuster's chicken gun. Their really slow opening times mean you need a rather long barrel to compensate by giving the projectile more time to accelerate.
__________________ Forum Rules |
|
| |
|
05-14-2008, 10:21 PM
| #3 |
| Senior Member Join Date: Apr 2008
Posts: 286
UserID: 1517 | Re: Butterfly valve? The Mytherbusters did use it in their chicken cannon. The used a really long torque are with weights at the end so that it would open faster.
__________________ My homemade |
| |
