Observed arrival · 2026-09-13
Master Stream Calculator
A firefighter hydraulics calculator that estimates smooth-bore master-stream performance from monitor pressure, equipment choices, and tip diameter.
Field notes
The tool models a complete smooth-bore master-stream path rather than treating the monitor inlet gauge as nozzle-tip pressure. Users choose equipment from monitor, extension, straightener or shaper, and tip libraries, while the calculator estimates flow, reaction, reach, and velocity. Its documentation notes that absent manufacturer loss data are represented as 0 psi but visibly flagged, and that extension-device loss is not subtracted twice when inlet pressure is measured downstream.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue