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Thread: Turbines

  1. #1

    Turbines

    Anyone does know how to modify the aircraft.cfg to reduce power of a PT6A turbine from 950 shp to 750 shp?
    Thanks to who will help me!!:sly:

    Miro
    Miro

    AMD FX-8350 @ 4.0 GHz, AMD (GigaByte) Radeon R9 280X Series @ 3GB Video, ATI Radeon SoundCard, GigaByte FX-990GAUD, Samsung 840EVO SSD @ 120GB, WD Caviar Blue @ 1TB

  2. #2
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    Quote Originally Posted by mirage3 View Post
    Anyone does know how to modify the aircraft.cfg to reduce power of a PT6A turbine from 950 shp to 750 shp?
    Thanks to who will help me!!:sly:

    Miro
    ================================================== ====================
    Note: The following number are used STRICTLY for example purposes and were derived from a sample file:

    Now, in the .cfg file, you should see the following:

    [turboprop_engine]
    power_scalar=1.0 //Scalar on Turboprop power
    maximum_torque=2300 //Maximum torque available (ft-lbs)

    You should adjust the power scalar from THE ORIGINAL VALUE to a scalar of 750/950 = 0.79.

    If the original power scalar is 0.9, the new scalar is 0.71.
    If the original power scalar is 1.0, the new scalar is 0.79.
    If the original power scalar is 1.1, the new scalar is 0.87.
    and so forth ...

    Now to adjust the Torque number ------

    Horsepower = Torque x RPM / 5252, therefore, Torque = ((5252)/RPM))x(HP)

    Since you are NOT changing the RPM speed of the powerplant, the value (5252/RPM) would be the same
    constant for both HP figures. Therefore, you would ADJUST the Torque number by the same scalar factor
    as the HP figure.

    For the NEW HP figure, Maximum Torque = 2300 x 0.79 = 1817 (for the 750 SHP figure).

    Hope it helps.

  3. #3
    Thank you very much!
    Miro

    AMD FX-8350 @ 4.0 GHz, AMD (GigaByte) Radeon R9 280X Series @ 3GB Video, ATI Radeon SoundCard, GigaByte FX-990GAUD, Samsung 840EVO SSD @ 120GB, WD Caviar Blue @ 1TB

  4. #4
    Because, i am modifying the IRIS PC-9M to a PC-7MkII, the fuselar is the same, but the power is reduced!
    Miro

    AMD FX-8350 @ 4.0 GHz, AMD (GigaByte) Radeon R9 280X Series @ 3GB Video, ATI Radeon SoundCard, GigaByte FX-990GAUD, Samsung 840EVO SSD @ 120GB, WD Caviar Blue @ 1TB

  5. #5
    SOH-CM-2023
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    You're welcome. Enjoy it.

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