The Freeman Ratio (Episode #49)

As the American Fire Service keeps trending towards high flow, low pressure attack packages it is important to understand what Dennis LeGear refers to as ‘gold standard’ for fire stream development in this episode. That standard is the Freeman Ratio, developed by John Freeman in the late 1800’s and still very relevant today, states that the nozzle orifice diameter should be half of the hose diameter. Dennis also speaks to finding balance with the Freeman Ratio and hose construction as well as nozzle reaction.
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[@tiredofyou495]

Great job Dennis

[@christopherwilson7815]

Can you let us know which formula you are using for the stream velocity (fps)?

[@rparker9928]

What about that 1.5" coupling on the hose and the nozzle ???

[@boopiedistura]

Hmmm interesting