Xfoil polar. Reynolds number fixed. Mach number fixed Polar key,xf-naca643218-il-500000 Airfoil,naca643218-il Reynolds number,500000 Ncrit,9 Mach,0 Max Cl/Cd,89.5661 Max Cl/Cd alpha,6.75 Url,http://airfoiltools.com/polar/csv?polar=xf-naca643218-il-500000 Alpha,Cl,Cd,Cdp,Cm,Top_Xtr,Bot_Xtr -19.250,-0.9293,0.11239,0.10900,-0.0345,1.0000,0.0240 -19.000,-0.9599,0.10274,0.09913,-0.0404,1.0000,0.0240 -18.750,-0.9818,0.09520,0.09139,-0.0447,1.0000,0.0241 -18.500,-1.0002,0.08862,0.08462,-0.0483,1.0000,0.0241 -18.250,-1.0157,0.08277,0.07858,-0.0514,1.0000,0.0243 -18.000,-1.0280,0.07767,0.07331,-0.0538,1.0000,0.0243 -17.750,-1.0395,0.07293,0.06839,-0.0560,1.0000,0.0244 -17.500,-1.0486,0.06872,0.06401,-0.0578,1.0000,0.0245 -17.250,-1.0532,0.06496,0.06010,-0.0586,1.0000,0.0248 -17.000,-1.0508,0.06221,0.05727,-0.0589,1.0000,0.0250 -16.750,-1.0461,0.05985,0.05487,-0.0593,1.0000,0.0252 -16.500,-1.0414,0.05755,0.05251,-0.0598,1.0000,0.0255 -16.250,-1.0367,0.05526,0.05014,-0.0601,1.0000,0.0257 -16.000,-1.0317,0.05309,0.04791,-0.0604,1.0000,0.0260 -15.750,-1.0263,0.05097,0.04572,-0.0606,1.0000,0.0263 -15.500,-1.0206,0.04895,0.04361,-0.0608,1.0000,0.0266 -15.250,-1.0130,0.04711,0.04169,-0.0608,1.0000,0.0268 -15.000,-1.0054,0.04532,0.03983,-0.0607,1.0000,0.0272 -14.750,-0.9976,0.04361,0.03803,-0.0606,1.0000,0.0277 -14.500,-0.9892,0.04199,0.03632,-0.0604,1.0000,0.0280 -14.250,-0.9800,0.04046,0.03470,-0.0602,1.0000,0.0283 -14.000,-0.9709,0.03898,0.03312,-0.0599,1.0000,0.0286 -13.750,-0.9569,0.03774,0.03185,-0.0590,1.0000,0.0291 -13.500,-0.9451,0.03648,0.03061,-0.0584,1.0000,0.0297 -13.250,-0.9336,0.03525,0.02937,-0.0578,1.0000,0.0301 -13.000,-0.9221,0.03403,0.02814,-0.0574,1.0000,0.0306 -12.750,-0.9105,0.03284,0.02691,-0.0569,1.0000,0.0311 -12.500,-0.8987,0.03169,0.02573,-0.0563,1.0000,0.0317 -12.250,-0.8869,0.03055,0.02454,-0.0557,1.0000,0.0323 -12.000,-0.8744,0.02948,0.02343,-0.0551,1.0000,0.0329 -11.750,-0.8622,0.02842,0.02231,-0.0544,1.0000,0.0334 -11.500,-0.8553,0.02702,0.02095,-0.0533,1.0000,0.0343 -11.250,-0.8451,0.02590,0.01985,-0.0525,1.0000,0.0352 -11.000,-0.8048,0.02461,0.01852,-0.0576,0.9579,0.0365 -10.750,-0.7705,0.02352,0.01730,-0.0611,0.9334,0.0380 -10.500,-0.7568,0.02247,0.01613,-0.0607,0.9075,0.0391 -10.250,-0.7506,0.02141,0.01500,-0.0589,0.8876,0.0402 -10.000,-0.7410,0.02059,0.01409,-0.0572,0.8726,0.0415 -9.750,-0.7305,0.01983,0.01324,-0.0556,0.8595,0.0428 -9.500,-0.7183,0.01915,0.01247,-0.0541,0.8478,0.0442 -9.250,-0.7125,0.01820,0.01145,-0.0519,0.8366,0.0458 -9.000,-0.7034,0.01746,0.01067,-0.0499,0.8260,0.0479 -8.750,-0.6915,0.01689,0.01003,-0.0481,0.8167,0.0502 -8.500,-0.6856,0.01625,0.00933,-0.0452,0.8073,0.0527 -8.250,-0.6746,0.01574,0.00880,-0.0430,0.7991,0.0560 -8.000,-0.6592,0.01524,0.00826,-0.0414,0.7909,0.0604 -7.750,-0.6422,0.01478,0.00776,-0.0401,0.7838,0.0666 -7.500,-0.6246,0.01423,0.00726,-0.0388,0.7760,0.0764 -7.250,-0.6072,0.01366,0.00674,-0.0376,0.7690,0.0924 -7.000,-0.5886,0.01307,0.00626,-0.0366,0.7621,0.1164 -6.750,-0.5699,0.01242,0.00577,-0.0356,0.7548,0.1507 -6.500,-0.5518,0.01171,0.00524,-0.0347,0.7483,0.1994 -6.250,-0.5341,0.01077,0.00466,-0.0337,0.7411,0.2712 -6.000,-0.5171,0.00975,0.00406,-0.0328,0.7344,0.3648 -5.750,-0.4939,0.00933,0.00387,-0.0323,0.7283,0.4388 -5.500,-0.4666,0.00921,0.00378,-0.0324,0.7218,0.4657 -5.250,-0.4387,0.00916,0.00369,-0.0324,0.7157,0.4824 -5.000,-0.4105,0.00914,0.00362,-0.0325,0.7099,0.4953 -4.750,-0.3817,0.00913,0.00355,-0.0328,0.7037,0.5062 -4.500,-0.3535,0.00910,0.00350,-0.0329,0.6978,0.5153 -4.250,-0.3248,0.00914,0.00344,-0.0331,0.6924,0.5250 -4.000,-0.2962,0.00914,0.00346,-0.0332,0.6865,0.5347 -3.750,-0.2673,0.00917,0.00340,-0.0334,0.6809,0.5423 -3.500,-0.2387,0.00919,0.00340,-0.0336,0.6757,0.5491 -3.250,-0.2097,0.00926,0.00342,-0.0338,0.6704,0.5580 -3.000,-0.1811,0.00928,0.00347,-0.0339,0.6649,0.5669 -2.750,-0.1522,0.00934,0.00347,-0.0341,0.6599,0.5733 -2.500,-0.1229,0.00936,0.00340,-0.0345,0.6549,0.5766 -2.250,-0.0938,0.00926,0.00332,-0.0348,0.6497,0.5798 -2.000,-0.0647,0.00923,0.00327,-0.0351,0.6450,0.5829 -1.750,-0.0356,0.00927,0.00325,-0.0353,0.6406,0.5866 -1.500,-0.0063,0.00927,0.00323,-0.0357,0.6363,0.5904 -1.250,0.0231,0.00926,0.00320,-0.0361,0.6319,0.5936 -1.000,0.0523,0.00922,0.00314,-0.0364,0.6277,0.5968 -0.750,0.0813,0.00922,0.00311,-0.0367,0.6238,0.5998 -0.500,0.1106,0.00924,0.00313,-0.0371,0.6201,0.6028 -0.250,0.1399,0.00923,0.00314,-0.0374,0.6163,0.6062 0.000,0.1693,0.00924,0.00313,-0.0378,0.6125,0.6096 0.250,0.1987,0.00928,0.00312,-0.0382,0.6089,0.6129 0.500,0.2277,0.00929,0.00314,-0.0385,0.6054,0.6168 0.750,0.2568,0.00931,0.00320,-0.0388,0.6021,0.6206 1.000,0.2861,0.00933,0.00325,-0.0392,0.5989,0.6246 1.250,0.3154,0.00937,0.00328,-0.0396,0.5957,0.6287 1.500,0.3447,0.00939,0.00331,-0.0399,0.5927,0.6328 1.750,0.3737,0.00943,0.00337,-0.0402,0.5898,0.6369 2.000,0.4029,0.00953,0.00347,-0.0406,0.5864,0.6413 2.250,0.4319,0.00955,0.00354,-0.0409,0.5830,0.6462 2.500,0.4609,0.00957,0.00359,-0.0412,0.5792,0.6508 2.750,0.4898,0.00959,0.00368,-0.0414,0.5760,0.6555 3.000,0.5188,0.00965,0.00376,-0.0417,0.5730,0.6606 3.250,0.5481,0.00979,0.00387,-0.0421,0.5699,0.6660 3.500,0.5767,0.00981,0.00399,-0.0424,0.5666,0.6712 3.750,0.6048,0.00980,0.00405,-0.0425,0.5610,0.6768 4.000,0.6331,0.00981,0.00404,-0.0426,0.5540,0.6829 4.250,0.6609,0.00980,0.00409,-0.0426,0.5464,0.6886 4.500,0.6886,0.00978,0.00413,-0.0426,0.5394,0.6943 4.750,0.7168,0.00988,0.00422,-0.0427,0.5336,0.7006 5.000,0.7444,0.00985,0.00429,-0.0427,0.5258,0.7066 5.250,0.7712,0.00989,0.00434,-0.0426,0.5162,0.7127 5.500,0.7985,0.00990,0.00444,-0.0425,0.5067,0.7194 5.750,0.8255,0.00999,0.00454,-0.0424,0.4986,0.7257 6.000,0.8522,0.01002,0.00467,-0.0423,0.4884,0.7321 6.250,0.8787,0.01012,0.00480,-0.0422,0.4769,0.7392 6.500,0.9042,0.01023,0.00494,-0.0418,0.4627,0.7457 6.750,0.9288,0.01037,0.00511,-0.0413,0.4418,0.7527 7.000,0.9498,0.01070,0.00532,-0.0403,0.3991,0.7604 7.250,0.9594,0.01158,0.00587,-0.0377,0.3316,0.7676 7.500,0.9663,0.01265,0.00662,-0.0347,0.2683,0.7760 7.750,0.9720,0.01363,0.00737,-0.0316,0.2173,0.7839 8.000,0.9761,0.01450,0.00807,-0.0281,0.1790,0.7928 8.250,0.9773,0.01529,0.00875,-0.0241,0.1506,0.8017 8.500,0.9797,0.01619,0.00956,-0.0207,0.1273,0.8117 8.750,0.9833,0.01711,0.01042,-0.0177,0.1074,0.8215 9.250,0.9920,0.01913,0.01238,-0.0125,0.0789,0.8441 9.500,0.9973,0.02016,0.01342,-0.0102,0.0687,0.8568 9.750,1.0024,0.02125,0.01453,-0.0079,0.0614,0.8717 10.000,1.0088,0.02223,0.01559,-0.0058,0.0560,0.8894 10.250,1.0126,0.02332,0.01675,-0.0035,0.0521,0.9152 10.500,1.0287,0.02446,0.01799,-0.0037,0.0479,0.9636 10.750,1.0390,0.02580,0.01934,-0.0032,0.0450,1.0000 11.000,1.0504,0.02705,0.02061,-0.0026,0.0425,1.0000 11.250,1.0566,0.02869,0.02224,-0.0017,0.0404,1.0000 11.500,1.0670,0.03004,0.02363,-0.0011,0.0386,1.0000 11.750,1.0767,0.03145,0.02507,-0.0005,0.0370,1.0000 12.000,1.0837,0.03310,0.02673,0.0001,0.0356,1.0000 12.250,1.0877,0.03502,0.02867,0.0009,0.0342,1.0000 12.500,1.0973,0.03653,0.03023,0.0013,0.0332,1.0000 12.750,1.1061,0.03815,0.03190,0.0017,0.0319,1.0000 13.000,1.1132,0.03994,0.03370,0.0021,0.0309,1.0000 13.250,1.1150,0.04225,0.03602,0.0026,0.0300,1.0000 13.500,1.1229,0.04406,0.03789,0.0029,0.0291,1.0000 13.750,1.1314,0.04584,0.03974,0.0030,0.0284,1.0000 14.000,1.1397,0.04769,0.04163,0.0031,0.0275,1.0000 14.250,1.1471,0.04965,0.04363,0.0032,0.0269,1.0000 14.500,1.1530,0.05179,0.04578,0.0032,0.0262,1.0000 14.750,1.1548,0.05427,0.04827,0.0035,0.0255,1.0000 15.000,1.1635,0.05622,0.05030,0.0033,0.0251,1.0000 15.250,1.1713,0.05831,0.05247,0.0032,0.0246,1.0000 15.500,1.1789,0.06041,0.05465,0.0030,0.0242,1.0000 15.750,1.1856,0.06266,0.05695,0.0027,0.0237,1.0000 16.000,1.1926,0.06489,0.05924,0.0024,0.0234,1.0000 16.250,1.1992,0.06720,0.06160,0.0021,0.0230,1.0000 16.500,1.2054,0.06959,0.06403,0.0016,0.0226,1.0000 16.750,1.2119,0.07192,0.06639,0.0012,0.0223,1.0000 17.000,1.2185,0.07421,0.06872,0.0009,0.0221,1.0000 17.250,1.2256,0.07634,0.07088,0.0010,0.0217,1.0000 17.500,1.2305,0.07907,0.07371,0.0002,0.0215,1.0000 17.750,1.2344,0.08197,0.07672,-0.0006,0.0213,1.0000 18.000,1.2375,0.08501,0.07988,-0.0015,0.0211,1.0000 18.250,1.2408,0.08804,0.08301,-0.0025,0.0210,1.0000 18.500,1.2422,0.09142,0.08651,-0.0037,0.0207,1.0000 18.750,1.2436,0.09482,0.09003,-0.0049,0.0206,1.0000 19.000,1.2437,0.09848,0.09380,-0.0063,0.0204,1.0000 19.250,1.2432,0.10225,0.09769,-0.0079,0.0202,1.0000