<?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"> <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>