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  • tweetdriver
    replied
    Originally posted by carras320 View Post
    pilot cut afterburners and we see some kind of smoke spraying out on the back of the aircraft, or itīs fuel not burned?.
    That is unused fuel from the burner feed lines (up to 50 kg) that es being vented outboard.

    Leave a comment:


  • Roy C
    replied
    Originally posted by carras320 View Post
    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 itīs fuel not burned?.

    Cheers.

    Carras
    where from? the exhaust or underneath?

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  • carras320
    replied
    Originally posted by Roy C View Post
    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 itīs fuel not burned?.

    Cheers.

    Carras

    Leave a comment:


  • Roy C
    replied
    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

    Leave a comment:


  • carras320
    replied
    Itīs seems some kind of bleed air coming from the compressor.

    Cheers!!

    Leave a comment:


  • UALdave
    started a topic White smoke coming out of a Tornado?...

    White smoke coming out of a Tornado?...

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

    What's that white smoke from??
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