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  1. #1
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    Climbing too steeply !

    Hi everyone,

    I don't know if this is a recognised problem but for some reason when I engage the VNAV on the Project Magenta MCP it starts to climb very steeply as much as 5600 per min, is there a setting I can adjust in the CDU ?

    Thanks
    Andi

  2. #2
    Forum Moderator JWS's Avatar
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    Re: Climbing too steeply !

    Andi,

    Had a similar problem yesterday (but in the opposite direction) when engaging the second AP on an autoland. Unchecked the Beta autopilot and thinghs went better.

    What you have to bear in mind is that the power of the engines is pretty stiff, so when you take off in a light configuration (low on pax, cargo or fuel) it is better to select a climb 1 or climb 2 and add some assumed temps or derated stuff as well (especially when you have lot's of runway to use).

    JWS

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    Re: Climbing too steeply !

    thanks JWS I was using a light config I will do as you suggest

    Cheers
    Andi

  4. #4
    Forum Moderator JWS's Avatar
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    Re: Climbing too steeply !

    OK, like to hear the results in due time. And don't forget your Cost Index.

    JWS

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    Re: Climbing too steeply !

    I usually put cost at 80, but another thing, what do you normally put underneath the flap setting **.*% I never enter anything here, I thought that might have something to do with it ?

    Cheers
    Andi

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    Re: Climbing too steeply !

    80 seems a lot. For example in Finnair they use 40 or 30 in real life.
    My problem is aircraft not descending enough steep

  7. #7
    Forum Moderator JWS's Avatar
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    Re: Climbing too steeply !

    80 is too much, I've heard that Trannsavia uses 011.

    The Centre of Gravity is a problem, yes. If I recall correctly this should be around 26 or so. Don't know exactly. Maybe a general call for help gives us some info.

    JWS

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    Re: Climbing too steeply !

    Thanks JWS, this is helpful stuff, I've been so used to the PMDG CDU I never came across this CG setting before so I was a little unsure what it was.

    Cheers
    Andi

  9. #9
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    Re: Climbing too steeply !

    Hi JWS, I altered the CG and Cost index to the values you suggested and it seems to be working much better so thanks for your help on this

    Andi

  10. #10
    Forum Moderator JWS's Avatar
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    Re: Climbing too steeply !

    Maybe you can compare the figures from PMDG with the data from PM and use the same CG figure in PM (PMDG generates this automatically, PM does not). Like to know what you use.

    Glad to be of help.

    JWS
    Last edited by JWS; 11-25-2010 at 04:28 AM.

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