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  5. Spd bug set through Flipchart

Spd bug set through Flipchart

Scheduled Pinned Locked Moved 146 Professional
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  • A Offline
    A Offline
    Andre92
    wrote on last edited by
    #1

    Hello,

    1. When pressing the preferred Flapsetting on the Flipchart during the descend phase, the N1, TGT and v-spd bugs are set automatically. But the Spd bug is also set to Vapp.
      The spd bug is normally used as a reference spd for the actual flight situation.

    Wouldn’t it make more sense, not to the set the Spd bug when using the flipchart? (I don’t mean the v-spd bugs, just the spd bug normally set by knob at the speed indicator).

    1. When activating IAS vertical mode, the actual spd is referenced. So this is independent of the spd bug setting. I’m surprised that the spd bug is not referenced, or set to this spd automatically. Is this how it works in the real aircraft?

    Thank you!

    Kind Regards,
    Andre

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    • P Offline
      P Offline
      plhought
      wrote on last edited by
      #2

      The orange "speed bug" on the airspeed indicator is just a bug on the instrument and only interfaces with the fast/slow speed deviation bug on the ADI.

      However, on many aircraft - the fast/slow deviation scale on the ADI is actually deactivated. Don't know why. Just something I've noticed with some old 146's out there.

      It does not interface with the AP or flight director modes to answer your IAS vertical mode question. When IAS mode is selected the pitch attitude of the aicraft is automatically controlled to maintain the airspeed existing at the moment of mode selection.

      vAPP is a pretty standard SOP selection so it can drive the fast/slow scale on the ADI, which gives the pilot good feedback when flying an approach.

      As for it's use in other phases of flight - it would be up to the operator but set it as you see fit!

      Patrick

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