1. #1
    commercial jet thing eh ..... please help....

    TY
    Share this post

  2. #2
    commercial jet thing eh ..... please help....

    TY
    Share this post

  3. #3
    Velocity.

    Indicated Air Speed, really.
    Share this post

  4. #4
    ooooops ....ty

    how about the N in N1,N2 of jets ENG.?
    Share this post

  5. #5
    Umm Number 1, Number 2, ?
    Share this post

  6. #6
    Targ's Avatar Senior Member
    Join Date
    Nov 2001
    Posts
    1,397
    Bugs set...
    Share this post

  7. #7
    each engines has n1 n2 rpm
    but dunno wat N means
    Share this post

  8. #8
    Targ's Avatar Senior Member
    Join Date
    Nov 2001
    Posts
    1,397
    N1 is the low engine pressure compressor and N2 is the high engine compressor gauge.
    They are gauges used with the epr in an emacs seen on glass cockpits.
    Measures engine compression in and out and is dispalyed as a percentage IE 80% or 120% of engine power.
    You can set the computer to use EPR and unless the computer glitches it will control the takeoff for you. Fed ex MD-11's are all epr take offs.
    Pilot sets the epr and has his hands on his knees in case he needs to manually take control (the epr fails)and watches the N1, N2 ,EGT and FF during take off to make sure they are not to low.
    I have only jumpseated on Fed-ex planes a few time so I dont really understand exactly how auto thrust airplanes work (just a basic understanding) as most of the cockpits I have flown were not built before the 70's
    Share this post

  9. #9
    WTE_Galway's Avatar Senior Member
    Join Date
    Oct 2002
    Posts
    6,029
    most of the "V"s are in this list:

    http://www.gps.tc.faa.gov/glossary.html

    watch out for Vne
    Share this post

  10. #10
    BfHeFwMe's Avatar Banned
    Join Date
    Feb 2003
    Posts
    1,224
    N1 is your fan assembly, N2 is your compression section, the fan assembly is for bypass thrust with much of the air never entering the engine. Why they're called Turbo'fan's. Each fan section can be on it's own shaft in more modern engines.

    Engine pressure ratio is measured forward and aft of the N2 section, that being one of the measures of the power being produced. The other is EGT, exhaust gas temp, a probe gives a reading right behind the hot section turbine.
    Share this post