Calculator for Engine Pressure

Issue 11 and Volume 86.

Calculator for Engine Pressure A gauge with which it is easy to compute the pressure necessary at the pumper when the length of hose and size of nozzle are given, has been designed by Chief James E. Garwood, of Michigan City, Ind. Computations for the gauge were made from data in use at the Detroit Fire Department Training School. A number of fire prevention engineers who inspected this gauge believe that it will find a ready reception in Fire Department work. The gauge is provided with a center knob which operates the pointer. As it is set in the photograph, it is to solve a problem where 500 feet of 2 1/2-inch hose are used provided with a 1 1/8-inch nozzle. The dial is standardized at 54 pounds nozzle pressure as being efficient for hose streams. By bringing the pressure hand parallel with the pointer, the gauge shows that a…

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