<?xml version="1.0"?>
<!--
Diameter: 76 in (1.93 m)
Calculated blade angle: at 75% of the radius
Data from NACA Report 640 : http://naca.central.cranfield.ac.uk/reports/1938/naca-report-640.pdf
-->
<propeller name="15 -25 deg NACA 640 (5868-9) 76-inch Two-Blade Propeller">
<ixx> 1.67 </ixx>
<diameter unit="IN"> 76.0 </diameter>
<numblades> 2 </numblades>
<minpitch> 15 </minpitch>
<maxpitch> 25 </maxpitch>
<table name="C_THRUST" type="internal">
<tableData>
15 20 25
0 0.0990 0.1040 0.1125
0.1 0.0950 0.1040 0.1100
0.2 0.0880 0.1030 0.1075
0.3 0.0780 0.1010 0.1060
0.4 0.0645 0.0930 0.1055
0.5 0.0495 0.0820 0.1045
0.6 0.0340 0.0700 0.0970
0.7 0.0185 0.0550 0.0870
0.8 0.0040 0.0390 0.0750
0.9 -0.0160 0.0240 0.0600
1 -0.0300 0.0060 0.0450
1.1 -0.0400 -0.0140 0.0300
1.2 -0.0500 -0.0330 0.0150
1.3 -0.0550 -0.0450 -0.0010
1.5 -0.0650 -0.0600 -0.0250
2 -0.0750 -0.0720 -0.0750
3 -0.0800 -0.0800 -0.0900
</tableData>
</table>
<table name="C_POWER" type="internal">
<tableData>
15 20 25
0 0.0400 0.0660 0.1080
0.1 0.0406 0.0650 0.1060
0.2 0.0406 0.0640 0.1020
0.3 0.0400 0.0625 0.0975
0.4 0.0366 0.0600 0.0910
0.5 0.0318 0.0580 0.0860
0.6 0.0250 0.0540 0.0825
0.7 0.0160 0.0475 0.0790
0.8 0.0050 0.0370 0.0730
0.9 -0.0067 0.0260 0.0640
1 -0.0150 0.0100 0.0520
1.1 -0.0200 0.0000 0.0375
1.2 -0.0250 -0.0100 0.0220
1.3 -0.0270 -0.0200 0.0040
1.5 -0.0300 -0.0350 -0.0450
2 -0.0330 -0.0500 -0.0750
</tableData>
</table>
</propeller>