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Getting Back to Basics: Nozzles & Hose Streams
I would like to start this off by looking at this picture and what I would like for everyone to do is tell me everything you see on what is being done wrong or right and what is missing and needs to be added. And as we go along we will get into Different types of nozzles some that are old and some that are new, and if anyone has some insight for the rookies in here please share. Remember Knowledge is power, and with that knowledge it keeps you and everyone else safe.
Replies to This Discussion
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Permalink Reply by Doug on
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Yep, you advance the entire way to the cylinder in fog pattern until you reach the shut-off valve. Move as one, don't one handline team get ahead of the other. The best way to avoid this is have the shut-off valve guy, the man in the middle, call the shots, the advancement, be the bowman if you will.
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Permalink Reply by Loyd Dittfurth on
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I was taught never to get on your knees because you dont have a way out
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Permalink Reply by MInnFIrefighter on
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This site needs more real discussions like this one, Thank you to all.
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Permalink Reply by Scott on
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SO many things wrong as previously noted, but how about them helmet flaps? Or how about them hoods? looks like they are so bunched up that it is obvious they aren't tucked down inside the coats, and since we can't even see the fronts, I would assume their is so much more wrong that we can;t even tell!
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Permalink Reply by John Crabbe on
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Thought I would chime in about the Navy APN (all purpose nozzle) The bail is 3 position, off, middle is fog or big opening, and all the way open is straight stream (the small orfice) (I hope I don't have those mixed up).
The purpose of this nozzle was to marry up with a 4 ft fog applicator nozzle for shipboard firefighting. It can be used for a piecing applicator as Doug shows. For the most part this nozzle has gone bye bye from the US Navy. Shipboard FF is pretty much done with fixed gallonage vary nozzles.
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Permalink Reply by CHIEF NORMAN on
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John can you give everyone more insight on what the US Navy is useing now?
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Pretty much these Chief.
http://www.allhandsfire.com/fire/prods/AB-3020_3023.html
Fixed gallonage...95gpm for inside the ship, 125 gpm for outside. The nozzle is also suppossed to allow you to flush the debris, but the fire pumps on most ships today have better filters than in the past. Used to be each fire station on a ship had a marine strainer to prevent shells, etc from plugging the nozzle, but these nozzles are able to flush thus eliminating the marine strainer. The marine strainer was also needed for the old Navy APN, and with the switch to the vari nozzle, the strainers weren't needed.
As for the GPM, yes, it does seem low, but the other issue is that the same water used for FF can lead to sinking as well, there is no defensive operation in the Navy. Fire attack is typically done with a narrow fog pattern to allow steam to be the bigger suppressor than water. You also see extensive systems on ships to limit direct firefighting efforts.
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Permalink Reply by Chief Dino on
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A little more info for the group. The 95 and 125 gpm nozzles are used on 1 ½” lines and there is also a 250 gpm nozzle used with 2 ½” lines. All nozzles have three positions for firefighting, solid stream, wide angle fog (about 75 deg), and narrow angle fog (about 30 deg) the fourth position is a flush position only used to flush the nozzle of marine life. The all purpose nozzle shown above is still used in the 2 1/2 size and is found aboard ships with aircraft capability and is used with a 10' fog applicator to provide a wide fog pattern to cool ordinance and fire fighters in proximity suits.
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The all purpose nozzle shown above is still used in the 2 1/2 size and is found aboard ships with aircraft capability and is used with a 10' fog applicator to provide a wide fog pattern to cool ordinance and fire fighters in proximity suits.
Where was this done Chief? I commissioned the Truman and there was no APN or applicators on the ship, not even the flight deck. It still may have been use on other ships, but I do believe it was found the vari nozzle could do the same stuff as the applicator and that is why the APN went away.
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I was on LASALLE from 04-05 and SAIPAN from 05-07 and both ships had one on the flight deck. When I commissioned BONHOMME RICHARD in 98 we didn't have one. So who knows. If the DCA didn't keep his AELs updated with what was supposed to be onboard like he should have. I don't think that NSTM 555 is still teaching APN with applicator anymore. They were nice to have but heavy as all get out.
TCSS
Shawn
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LaSalle and Saipan....nuf said. I think the LaSalle's sister ship is the Ark Noah used. :-D
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