In article , "Bob F"
wrote:

Brooklyn1 wrote:
On Thu, 30 Jun 2011 18:05:26 -0400, "Stormin Mormon"
wrote:

When I was in the fire service, we learned that both length
and diameter matters. Smaller hose increases pressure drop,
usually measured in psi drop per 100 feet of length.
500 foot hose has 5 times the pressure drop of 100 foot
hose.

Prove it.

You obviously weren't paying attention in class... so long as pressure
and diameter remains constant volume remains constant... it's when
there is pressure loss and diameter decreases that volume decreases...
fire hose diameter reduces even when moved around corners... every
sailer learns this from shipboard fire control tutorials. And were
you truly in fire service you'd know that fire hose lays flat when
unpressurized and it's diameter changes with changes in pressure...
all you did at the firehouse is polish the firemen's poles.

Too bad you're wrong. As water moves through a pipe, the sides of the pipe
cause
friction, resulting in pressure loss. The longer the pipe and larger the
speed
of the water through the pipe, the more pressure loss, so less water gets
pushed
out the end of a longer pipe. That's why they use larger pipes for longer
runs.
The larger pipe reduces the pressure losses, so you can get the desired
volume
out of the longer pipe.

It's called laminar flow http://en.wikipedia.org/wiki/Laminar_flow
--
- Billy

Mad dog Republicans to the right. Democratic spider webs to the left. True conservatives, and liberals not to be found anywhere in the phantasmagoria
of the American political landscape.

America is not broke. The country is awash in wealth and cash.
It's just that it's not in your hands. It has been transferred, in the
greatest heist in history, from the workers and consumers to the banks
and the portfolios of the uber-rich.
http://www.politifact.com/wisconsin/.../michael-moore
/michael-moore-says-400-americans-have-more-wealth-/