Charles oyston obtained a patent on a spray nozzle in 1863, the debate slowly emerged. Navy introduced the fog nozzle to thousand of men during world war ii. This video shows the difference between a smoothbore nozzle and a fog nozzle.
Smooth bore or fog nozzle, the positive and negative aspect of picking the right nozzle for fighting a fire. Only a straight stream. Two nozzle streams, fog or straight stream.
In this week’s #humpdayhangout, rick lasky, scott thompson, terry mcgrath, and john salka weigh in on the seemingly eternal smooth bore vs. This new technology is set to change the way the fire service makes interior attacks. A smooth bore nozzle can run at a lower pump/nozzle pressure with higher gpm output.
Usually a smooth bore nozzle for example given the following (200 ft of 1 3/4 hose) will generally have a nozzle pressure of 50 psi and a pump pressure of 110 to 115 psi, this will give you roughly a 160 gpm at the nozzle). A fog nozzle will usually have a. This nozzle provides many benefits and some disadvantages.
The smoothbore is a shutoff with a solid orifice with no moving parts, while some fog nozzles can consist of more than 50 parts. A motto i like to use, “complexity breeds chaos, simplicity always works”. This makes malfunction nearly impossible with smoothbore.
The debate over the smooth bore vs. Fog has been the longest lasting one in the american fire service. Ironically, this phenomenon reflects the reality that many firefighters nowadays focus chiefly on smooth bore and fog when dealing with nozzles.
Smooth bore nozzles outperform fog nozzles in that they have more operational benefits, which. The smooth bore nozzle may be viewed by some as “dated,” but if you take a little deeper look at history, you can see some very sound reasoning in the smooth bore nozzle. The operating pressure of the smooth bore is a range from 40 to 60 pounds per square inch (psi), with 50 psi as optimal.
Best fog nozzle weapons are the 50 psi nozzle pressure nozzles. To keep it brief, it equates to high volume of h2o (150+) with low nozzle reaction. The greater the nozzle pressure, the greater the nozzle reaction which equates to gating down the flow.
Automatic nozzles are dangerous, period. Of the five, the latter four make up a group of nozzles commonly called combination nozzles because they produce both a straight and a fog stream. The solid or smooth bore nozzle is the most basic of the four nozzle types, both in design and function.
In this week’s humpday hangout, rick lasky, scott thompson, terry mcgrath, and john salka weigh in on the seemingly eternal smooth bore vs. Fog nozzle debate among firefighters. 5090 words | 21 pages.
The characteristics of the smoothbore vs. Bryant boehner utah valley university course: Robert crane abstract the fire service, particularly over the last two decades has taken a deeper interest in firefighter safety and accident prevention.
Reducing the nozzle pressure is an option and is being applied as u. s. Poor foam production performance. Poor hydraulic ventilation performance.
This type of nozzle will produce the predetermined gpm when supplied with the. Automatic combination nozzle 100 psi np, 180 gpm.
