Pacific Fire Training
Passenger Service Emergency Response
For BNSF and Amtrak, nothing is more important than the safety of our passengers and employees. And when the rare incident involving passenger trains does occur, the safety of firefighters, police and other emergency responders is our priority as well. This training video shows how to respond safely and effectively to emergency situations involving passenger trains.
Talking Shop with Chief Billy Goldfeder
Previously recorded Webcast discussion about Officer responsibilities
Fire Service Hydraulics
This month we're doing a lot with pump pressures and flows. Attached below are links to different friction loss charts and apps. The friction loss cards have some of the "Street Smart" calculations. The chart listed is the same that is currently on most district apparatus. The two apps are not the only ones out there, they are just two of more user friendly and seem to have accurate information. The Elkhart app is free and the Flashover app has a one time cost of $1.99.
This month as we look at nozzles and flows, we also have discussed the differences in nozzle types. Below are a couple of video illustrations that show how water flows through different nozzle types.
GPM. Nozzle reaction. Weight per section of hose.
These associated numbers matter in relation to the maneuverability and efficiency in which you move hose.
Too little GPM with a high nozzle reaction and high weight, the rate at which you put out fire and move towards the seat will be slow going.
High flow rate with a low nozzle reaction and lighter weight per section and you’ll be able to keep the nozzle open longer without having to constantly re-establish your dominate position; flowing and moving with minimal rebound of fire growth will allow you to move to the seat quicker and give time back to THEM and us.
So how do we achieve the balance? Quality hose with a strong “backbone”. A robust hose construction allows you to flow higher rates at lower reaction pressures while lessening the likelihood of kinking and nozzle whip. This comes from the amount of water flowing through the hose. Water flows through the hose at a certain speed, is bottlenecked at the nozzle tip and is accelerated as it leaves. The speed of the water in the hose, just before it enters the nozzle, is where you get your performance in kinking and whip, specifically just behind the nozzle. This is all dependent on the amount of water you’re flowing and the true internal diameter of the hose, which we’ll cover another time.
Therefore, by doing your due diligence and taking all of this into consideration, you will have a package that is easy to hold, easy to drag, and easy to flow.
Again, the longer you can keep the nozzle open and flowing towards the seat of the fire, the quicker control and extinguishment is achieved and the safer the scene becomes for everyone involved.