RAF 31 AIRFOIL 18. 18. 0.000000 0.000000 0.012500 0.017880 0.025000 0.026970 0.050000 0.038730 0.075000 0.047000 0.100000 0.053660 0.150000 0.064490 0.200000 0.072320 0.250000 0.076850 0.300000 0.080780 0.400000 0.081240 0.500000 0.077700 0.600000 0.068560 0.700000 0.055020 0.800000 0.038680 0.900000 0.020040 0.950000 0.011370 1.000000 0.000000 0.000000 0.000000 0.012500 -0.017320 0.025000 -0.022830 0.050000 -0.030870 0.075000 -0.035500 0.100000 -0.038940 0.150000 -0.044010 0.200000 -0.046280 0.250000 -0.047150 0.300000 -0.046620 0.400000 -0.042360 0.500000 -0.036300 0.600000 -0.028440 0.700000 -0.020180 0.800000 -0.012120 0.900000 -0.005860 0.950000 -0.003330 1.000000 0.000000