White smoke coming out of a Tornado?...

[UALdave]

At about 5:33 into this video: http://www.youtube.com/watch?v=8zT4F...feature=relmfu

What's that white smoke from??

[carras320]

It´s seems some kind of bleed air coming from the compressor.

Cheers!!

[Roy C]

I was an engine man on tornado's and this is indeed bleed air from the engine compressors, which has been used to pressurize the Labyrinth seals of the engine bearings. the air pressure is greater than the oil pressure, so the oil is retained in the engine oil return system, the oil/air mix is then sent though a separator, but not all the oil is capable of being removed though and this smoke is actually a fine oil mist contained in the vented air.
http://en.wikipedia.org/wiki/Labyrinth_seal

[carras320]

Originally Posted by Roy C

I was an engine man on tornado's and this is indeed bleed air from the engine compressors, which has been used to pressurize the Labyrinth seals of the engine bearings. the air pressure is greater than the oil pressure, so the oil is retained in the engine oil return system, the oil/air mix is then sent though a separator, but not all the oil is capable of being removed though and this smoke is actually a fine oil mist contained in the vented air.
http://en.wikipedia.org/wiki/Labyrinth_seal

By the way, this is the same that happens when during take off the pilot cut afterburners and we see some kind of smoke spraying out on the back of the aircraft, or it´s fuel not burned?.

Cheers.

Carras

[Roy C]

Originally Posted by carras320

By the way, this is the same that happens when during take off the pilot cut afterburners and we see some kind of smoke spraying out on the back of the aircraft, or it´s fuel not burned?.

Cheers.

Carras

where from? the exhaust or underneath?