herald (plural heralds) 1  A messenger, especially one bringing important news. 2  A harbinger, giving signs of things to come. ( 3 heraldry) An official whose speciality is heraldry, especially one between the ranks of pursuivant and king-of-arms. ( entomology) A moth of the species Scoliopteryx libatrix.
a fire nozzle weighs approximately  ten to fifteen pounds.
GPA, the width of the nozzles on the spray boom is 24. inches and the nozzle flow rate is 0.2 gallons per minute: (0.2 x 5,940) Ã· (10 x 24) = 1,188 Ã· 240. = 4.95 miles per hour Field Speed. 3. Assessing the spray output of your boom when speed, nozzle spacing, nozzle flow rate and width between nozzles. are known.