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Environmental Control Panel - Bleed Switch

Scheduled Pinned Locked Moved TBM 850
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  • K Offline
    K Offline
    kityatyi
    wrote on last edited by
    #1

    According to the normal procedures, the BLEED SWITCH is to be set to the AUTO position.

    It would appear to me that the cabin only warms up with the switch set to the HI position, otherwise, the cabin will become cold at high altitudes or in cold weather.

    In other words, the BLEED SWITCH set to AUTO does not allow the cabin temperature to increase.

    Is this normal/realistic?

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  • sg_aviationS Offline
    sg_aviationS Offline
    sg_aviation
    wrote on last edited by
    #2

    BLEED in AUTO can keep the cabin at room temperature up to outside air temperature of approx. -30°C which matches approx. FL240 in ISA. Anything below requires BLEED set to HI, which decreases engine performance. You may also want to use HI in order to expedite warming of cabin out of cold temperature, however on the ground it will eventually also work in AUTO.

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  • K Offline
    K Offline
    kityatyi
    wrote on last edited by
    #3

    Thanks for your input, I will experiment!

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  • M Offline
    M Offline
    Mad_X
    wrote on last edited by
    #4

    Engine performance decrease unfortunately is not modeled yet but the ITT rise is.

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  • Q Offline
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    quba
    replied to Mad_X on last edited by
    #5

    @Mad_X I thought the engine performance decrease mostly results from that ITT increase, because then you can't push your engine as much. Or should there me even more pronounced effect of BLEED HI?

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  • M Offline
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    Mad_X
    replied to quba on last edited by
    #6

    @quba good question, I understood that there should also be a reduction in the torque achievable but your explanation also makes a lot of sense in the way that does to the ITT raise you have to lower the power - as you said.

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  • S Offline
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    SebAvi
    wrote on last edited by
    #7

    Can we expect that next update will proper simulate using bleed high and decrease TRQ?

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