fgdata/Aircraft/c172p/Engines/prop_76in2f_NACA_20deg.xml

<?xml version="1.0"?>

<!-- 
    Diameter: 76 in (1.93 m)
    Pitch: 62.5 in
    Calculated blade angle: 20° at 75% of the radius
    Data from NACA Report 640 : http://naca.central.cranfield.ac.uk/reports/1938/naca-report-640.pdf
-->

<propeller name="NACA 640 (5868-9) 76-inch 20deg Two-Blade Propeller" version="1.1">

    <ixx> 1.67 </ixx>
    <diameter unit="IN"> 76.0 </diameter>
    <numblades> 2 </numblades>
    <minpitch> 20 </minpitch>
    <maxpitch> 20 </maxpitch>

    <table name="C_THRUST" type="internal">
        <tableData>
            0	   0.1040
            0.1	   0.1040
            0.2	   0.1030
            0.3	   0.1010
            0.4	   0.0930
            0.5	   0.0820
            0.6	   0.0700
            0.7	   0.0550
            0.8	   0.0390
            0.9	   0.0240
            1	   0.0060
            1.1	   -0.0140
            1.2	   -0.0330
            1.3	   -0.0450
            1.5	   -0.0600
            2	   -0.0720
            3	   -0.0800
        </tableData>
    </table>

    <table name="C_POWER" type="internal">
        <tableData>
            0	   0.0660
            0.1	   0.0650
            0.2	   0.0640
            0.3	   0.0625
            0.4	   0.0600
            0.5	   0.0580
            0.6	   0.0540
            0.7	   0.0475
            0.8	   0.0370
            0.9	   0.0260
            1	   0.0100
            1.1	   0.0000
            1.2	   -0.0100
            1.3	   -0.0200
            1.5	   -0.0350
            2	   -0.0500
            3	   -0.0550
        </tableData>
    </table>

</propeller>