Looking for article about fire fighting and engine flameout

[Mast Bumper]

Sometime in the early 2000s one of the helicopter magazines published an article about the hypothetical risk of turbine helicopters experiencing engine flameouts while fighting forest fires due to low-level flying through super heated air or flying through air lacking oxygen content. Google and various other search engines aren't delivering any results. Does anyone remember the article and the specific title? Does anyone have a link? All help greatly appreciated.

[wrench1]

Originally Posted by Mast Bumper

All help greatly appreciated.

I don't remember a magazine article, but I do recall this if that helps, AWB 72-002:
https://www.casa.gov.au/standard-pag...rbineturboprop

[Ascend Charlie]

Some years ago, the Channel 2 Squirrel was filming the exhaust plume from a power station in the Hunter Valley. The cameraman asked for a shot straight down the funnel, and as they flew through the plume, the engine stopped.

Successful auto to the ground and a change of underwear.

[megan]

Also occurred to a helo in Ireland, report here.

http://www.aaiu.ie/sites/default/fil...nts/4571-0.pdf

Preliminary indications are that the helicopter flew into the exhaust plume of the power station chimneys, and that the flame-out was due to the ingestion of the plume. The presence of a large volume of oxygen-depleted combustion by-products, the very high temperature of the emitted gases or the presence of large amount of water vapour in the emissions, or a combination of these factors was, in all probability, sufficient to cause the flame-out. It is noteworthy that one of the camera crew stated that there was no visible plume at the time.

[Mast Bumper]

Thanks for the links so far, they are helping in my search. I'm still trying to find a magazine article from the early 2000s that was either in Rotor, Rotor&Wing, Vertical, or one of the other international publications. Running a search on those magagzines' websites hasn't led to any satisfactory results so far.

[Gordy]

I can tell you that I do not know of any cases of engine flameouts while fighting forest fires. We are not flying in the thick smoke, occasionally we will fly in the heat but that is momentary. I have seen some compressors not making O/H times due to increased particle ingestion however.

[Mast Bumper]

Gordy, several years ago when flying an Air Crane, we went through a phase of uncommanded engine shutdowns in flight and eventually narrowed the cause down to a handful of problems, both mechanical and operational. Flying through hot air or air depleted of oxygen was one of the problems. This was reproduceable, so not a wild guess on the company's part. Tanked helicopters spend much of their time on the fire at a much lower altitude than their longline counterparts and therefore also fly through air with much higher temperature gradients. Believe me, engine flameouts due to sudden changes in air temperature or lack of oxygen is a thing.

[megan]

A few moments ago researching something else came across this, a B-17 re-engined with Rolls Royce Dart turbo props being used on fires. Wonder if it played a role in the loss of the C-130 on a fire in Oz.

While fighting a forest fire near Dubois, Wyoming, the engines lost power due to excessive ingestion of heated air and smoke from the fire and the aircraft failed to pull out of a retardant drop.

http://aviationtrivia.b l o g s p o t.com/2010/06/in-late-1950s-many-of-surplus-boeing-b.html

Remove spaces for link to work.