Monday afternoon the Francis Fire was burning on the slopes above Fruit Heights between Salt Lake City and Ogden, Utah. More information about the fire is a Wildfire Today, but below are videos of fixed wing activity on the fire.
Aircraft at the scene included, at least, an MD-87, a BAe-146 (Tanker 168), and multiple helicopters in addition to an air attack ship.
Some video I shot of the plane dropping fire retardant. Amazing pilot. #FrancisFire pic.twitter.com/GdoHhj9LLl
— Andrew Gardiner (@AndrewGardiner_) September 17, 2019
The firefighters from @UintahCityFD91 waiting at the staging area of #FrancisFire. Air support working hard to get the fire under control. #BeSafe pic.twitter.com/ngvvL8btpR
— Uintah City Fire Department (@UintahCityFD91) September 17, 2019
NOW: MD-87 with a 3,000 gallon retardant drop over the #FrancisFire . I’m told another air tanker is en route to help. They will be filling up at Hill AFB . LINK: https://t.co/oISS438oNi @KUTV2News pic.twitter.com/51kE2h2Ld2
— Jeremy Harris (@JeremyHarrisTV) September 16, 2019
#FrancisFire air operations pic.twitter.com/6U0RzXMkDz
— Davis County SO (@DavisCountySO) September 16, 2019
At least two fixed wing aircraft now flying in drops of fire retardant to drop on the #FrancisFire.@kslnewsradio @KSL5TV @KSLcom pic.twitter.com/3yqVdY4hLQ
— Colby Walker (@walk_colb) September 16, 2019
Retardant drop at the #FrancisFire in Davis County. pic.twitter.com/Oihikjzq5Z
— John Franchi (@JFRANCHIREPORTS) September 16, 2019
#uwcnf Video of retardant drop on the #Francisfire taken by Forest engine crew 421 pic.twitter.com/RwgZCAdnsY
— Utah Fire Info (@UtahWildfire) September 17, 2019
There is more to the videos than MD 87 dropping. The air attack & air tanker pilots are “dialed in” on the required coverage level of retardant for the fuel type. The MD 87 drop is about ten to twelve seconds in duration, which represent a coverage level of two or three gallons per 100 square feet, adequate for this fuel type. The idea of applying retardant is not to drown the fire, but use sufficient retardant to allow the fire to enter the retardant line, reduce the intensity, and become a smoldering mass; without traveling through the retardant and exiting into untreated fuel.
I think the video shot by Mr. Gardiner is superb! It raises a question for me, but please excuse me for asking a question that may have been answered before. What’s the reason, other than “the STC was certified that way”, why the MD-87s fly their approach and execute a drop with the gear down? Thanks in advance.
Have you read this article?
https://fireaviation.com/2017/09/16/the-faa-requires-ericksons-md-87s-to-drop-retardant-with-landing-gear-down/?trashed=1&ids=28430#comment-23108
Be sure and read the comments.
Thanks Bill. No, I had not seen this article before.
I believe it is to lower VMC, if they lose their critical engine at low speed, it gives them a little more margin to respond.
Helps to control speed ! Slows down creates drag!