Ghostbusters Theory

Just a simple question and a bit of a brain teaser. This was brought up by one of our crew at last practice and I am curious. If you take two hose lines the same size with the same psi at the pump and same nozzles, straight stream on both 20 feet out and 20 feet up and cross those streams, will the streams be forced into one stream or will they go through each other and carry on to their intended target?

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Permalink Reply by John Crabbe on January 13, 2011 at 5:21pm
Try it and see what happens.
Permalink Reply by Dennis Smith on January 13, 2011 at 5:24pm
Do you know? We will try it when the weather is better but until then i am curious if anyone knows forsure.
Permalink Reply by Richard Armstrong on January 13, 2011 at 5:52pm
I'm pretty sure that the impingment will not allow them to cross nor will it be one stream it will turn to a "foggish" pattern.Of course it would depend on the angle that the two streams meet.If they are side by side then they will turn to one stream.never done it with these precise numbers as an experiment but have crossed strems on the fire ground and it did neither of what you said.
Permalink Reply by Jason Koontz on January 13, 2011 at 7:47pm
When someone asks you if you're a god, you say YES!

Sorry, favorite line.

Using lower pressure and smaller hoses, the streams become one, albeit not a very good one. More like colliding waterfalls. Not sure how increased pressure and larger lines would work though. I'm gonna have to try this one out just for fun!
Permalink Reply by joemac on January 28, 2011 at 12:30pm
The two streams will splatter each other. They will only combine when gravity is an assist (aimed downward), and the angle is not too acute.
Permalink Reply by Brian Dumser on January 28, 2011 at 8:22pm
I'm with Richard on this one. "Foggish"
Permalink Reply by Chris Moyer on January 29, 2011 at 10:21am
They just hit and break up . If I remember from watching water battles. In water battles you have 2 strait tip nozzles (the small brass ones ) with the same size openings and a keg or ball suspended on a cable. With a team on each side you try to push the keg or ball to the other teams side. If you've never done it its a blast!

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