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-   -   747 "Flames" From Engine On Start Up? (https://www.pprune.org/questions/263472-747-flames-engine-start-up.html)

Sheep fancier 8th February 2007 19:45
747 "Flames" From Engine On Start Up?
 
What causes this, inhibiting oil, slight fuel/oil spill within the nacelle?

PaperTiger 9th February 2007 17:05
"Hot Start" or "Wet Start", depending where you live.

Unburnt fuel which collected in the engine or tailpipe the last time it was shut down is ignited when you start it up again. The chaps in the Tech Forum can explain it in detail if you want.

Here's a video: http://www.metacafe.com/watch/319186/airplane_accident/

Sheep fancier 9th February 2007 19:59
Thanks very much for the info.:ok:

ABX 9th February 2007 22:17
So predictable to see the uninformed opinions of the posters under that video in metacafe ... "so dangerous" & "why was the camera man just standing there" etc.:yuk:

NutLoose 9th February 2007 23:43
I think you find that film is it burning off inhibiting fluid as the engine has been just put on the wing....... the person is standing there because he knows it will happen.

Blues&twos 10th February 2007 18:58
Hello. What is inhibiting fluid please??

henry crun 10th February 2007 19:20
Blues&twos: Google will give you all the info.

yachtno1 10th February 2007 21:26
It stops the internal parts of the engine from corroding and reduces deterioation whilst the engine is in storage. Causes a smoke screen when the engine is first started.:)

Capt. Inop 11th February 2007 10:13
"Hot Start" or "Wet Start", depending where you live.

Unburnt fuel which collected in the engine or tailpipe the last time it was shut down is ignited when you start it up again. The chaps in the Tech Forum can explain it in detail if you want.

Here's a video: http://www.metacafe.com/watch/319186/airplane_accident/
If my memory serves me right that would be good ole LN-BRI with #2 engine
fresh from the "shop". :cool:

chevvron 11th February 2007 10:31
Used to happen with Britannias virtually every start cycle.

Sheep fancier 22nd February 2007 17:07
I eventually found a pic of what I was looking for -
http://www.jetphotos.net/viewphoto.p...5917959&nseq=0
It looks rather nasty but I'm assured whilst it's not common these days there is no real danger.
SF


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