Aircraft incident Orlando International?
- Thread starter seagull
- Start date
adk
Steals Hotel Toilet Paper
Looks like there was a piston single accident at Sanford
View: https://twitter.com/NewsGuyGreg/status/1762630518913331476
View: https://twitter.com/NewsGuyGreg/status/1762630518913331476
DE727UPS
Well-Known Member
Looks like a gear up, or gear collapsed, Cirrus. Crazy how they shoot all that foam at it blocking the exit. Will have to ask MikeD what the protocol is about getting people out before blasting foam blocking the exit. Probably wasn't anyone in the plane during the video. See no CFR action with respect to getting people out. Cool to see how what the fire trucks do, though.
The persons aboard already appear to be out of the aircraft. That said, there are tactics and techniques for covering/protecting an exit with firefighting agent, while still retaining the ability for persons onboard to evacuate. Generally this involves handline use, or truck turrets at low pressure.
That’s not necessarily my big notice on this one. It’s obvious that a fuel cell has been compromised during the landing of this aircraft, what with the trail of burning fuels behind the aircraft and the fuel fire at the aircraft.
In the video, you have truck A-3 on the left, the Striker 3000 with the HRET aerial on top of it; and truck A-5 on the right, the smaller Striker 1500 crash truck. Both approach the aircraft from angles off one another and begin their attack. However, A-3 is using a high pressure straight stream of foam/water from its bumper turret directly into the burning fuel. Unfortunately, when this is done to burning pooled flammable liquids, in this case Avgas, a phenomenon called “plunging” occurs. Plunging is where a stream of firefighting agent…foam/water/dry chem, etc….applied at high pressure penetrates the surface of a burning flammable liquid. When this occurs, the burning liquid is highly agitated, causing fire behavior to get worse. The firefighting agent that penetrates the burning liquid gets coated in and by the burning liquid, and itself gets burned up by the burning liquid.
Truck A-5, however, has its bumper turret selected with a partial fog pattern, as opposed to straight stream, and is running a lower pressure. Additionally, A-5 is applying its foam/water in a back and forth “roll on” method…..or firing at the ground prior to the burning liquid and pushing the foam/water onto the surface of the burning fuel, as well as arcing the foam/water in a “rain down” method onto the fire. These two techniques ensure that finished foam is applied where it can blanket the fire and begin both cooling the fire as well as cutting off its oxygen supply. And these techniques prevent accidentally plunging the fuel, and thus highly reducing the effectiveness of the firefighting agents being applied, along with making the fire behavior worse. In short, truck A-3 is kind of ruining the work that truck A-5 is accomplishing.
That said, there is a place for high pressure straight stream usage. This is generally when you are at a distance from the aircraft or burning fuel container like a fuel storage tank, and need high pressure to either fire an arc or straight stream some distance from the truck to either rain foam/water down atop the burning liquids, or to reach a wall of background in order to slide the foam down onto the fire, or to push- on foam/water same.
Just my observation.
