Xfoil polar. Reynolds number fixed. Mach number fixed Polar key,xf-raf31-il-1000000-n5 Airfoil,raf31-il Reynolds number,1000000 Ncrit,5 Mach,0 Max Cl/Cd,83.3276 Max Cl/Cd alpha,7 Url,http://airfoiltools.com/polar/csv?polar=xf-raf31-il-1000000-n5 Alpha,Cl,Cd,Cdp,Cm,Top_Xtr,Bot_Xtr -19.250,-0.8783,0.13564,0.13343,-0.0229,1.0000,0.0112 -19.000,-0.9377,0.11986,0.11748,-0.0315,1.0000,0.0112 -18.750,-0.9867,0.10685,0.10433,-0.0386,1.0000,0.0111 -18.500,-1.0322,0.09506,0.09238,-0.0451,1.0000,0.0111 -18.250,-1.0760,0.08396,0.08112,-0.0514,1.0000,0.0109 -18.000,-1.1113,0.07466,0.07167,-0.0567,1.0000,0.0109 -17.750,-1.1425,0.06646,0.06332,-0.0614,1.0000,0.0109 -17.500,-1.1674,0.05939,0.05611,-0.0654,1.0000,0.0109 -17.250,-1.1861,0.05336,0.04995,-0.0689,1.0000,0.0110 -17.000,-1.1994,0.04820,0.04466,-0.0718,1.0000,0.0112 -16.750,-1.2104,0.04354,0.03988,-0.0744,1.0000,0.0112 -16.500,-1.2169,0.03968,0.03590,-0.0764,1.0000,0.0113 -16.250,-1.2201,0.03644,0.03256,-0.0779,1.0000,0.0116 -16.000,-1.2190,0.03388,0.02993,-0.0788,1.0000,0.0120 -15.750,-1.2169,0.03163,0.02761,-0.0792,1.0000,0.0123 -15.500,-1.2101,0.03003,0.02597,-0.0792,1.0000,0.0129 -15.250,-1.2083,0.02818,0.02404,-0.0788,1.0000,0.0130 -15.000,-1.2037,0.02679,0.02258,-0.0779,1.0000,0.0133 -14.750,-1.1974,0.02572,0.02145,-0.0766,1.0000,0.0139 -14.500,-1.1942,0.02468,0.02033,-0.0745,1.0000,0.0141 -14.250,-1.1923,0.02380,0.01937,-0.0715,1.0000,0.0144 -14.000,-1.1905,0.02315,0.01864,-0.0680,1.0000,0.0146 -13.750,-1.1870,0.02249,0.01794,-0.0645,1.0000,0.0149 -13.500,-1.1750,0.02195,0.01738,-0.0624,1.0000,0.0153 -13.250,-1.1615,0.02149,0.01690,-0.0604,1.0000,0.0156 -13.000,-1.1340,0.02105,0.01644,-0.0611,0.9991,0.0162 -12.750,-1.1050,0.02052,0.01587,-0.0622,0.9974,0.0166 -12.500,-1.0763,0.02001,0.01531,-0.0632,0.9951,0.0171 -12.250,-1.0494,0.01953,0.01479,-0.0638,0.9922,0.0177 -12.000,-1.0229,0.01904,0.01424,-0.0642,0.9884,0.0181 -11.750,-0.9949,0.01855,0.01369,-0.0649,0.9846,0.0184 -11.250,-0.9488,0.01746,0.01247,-0.0643,0.9668,0.0189 -11.000,-0.9194,0.01677,0.01173,-0.0654,0.9583,0.0194 -10.750,-0.8839,0.01627,0.01122,-0.0676,0.9511,0.0199 -10.500,-0.8438,0.01587,0.01079,-0.0707,0.9460,0.0204 -10.250,-0.8027,0.01539,0.01026,-0.0741,0.9405,0.0210 -10.000,-0.7621,0.01492,0.00972,-0.0773,0.9336,0.0215 -9.750,-0.7251,0.01449,0.00922,-0.0798,0.9243,0.0221 -9.500,-0.6935,0.01409,0.00872,-0.0810,0.9131,0.0225 -9.250,-0.6667,0.01376,0.00829,-0.0811,0.9029,0.0228 -9.000,-0.6422,0.01351,0.00797,-0.0807,0.8942,0.0231 -8.750,-0.6183,0.01324,0.00763,-0.0801,0.8864,0.0233 -8.500,-0.5949,0.01296,0.00730,-0.0794,0.8788,0.0235 -8.250,-0.5714,0.01269,0.00695,-0.0787,0.8718,0.0236 -8.000,-0.5503,0.01222,0.00641,-0.0776,0.8642,0.0240 -7.750,-0.5285,0.01179,0.00590,-0.0766,0.8575,0.0245 -7.500,-0.5054,0.01143,0.00551,-0.0758,0.8510,0.0249 -7.250,-0.4818,0.01114,0.00516,-0.0750,0.8445,0.0253 -7.000,-0.4576,0.01086,0.00484,-0.0744,0.8382,0.0256 -6.750,-0.4334,0.01061,0.00454,-0.0737,0.8303,0.0259 -6.500,-0.4089,0.01038,0.00426,-0.0731,0.8214,0.0263 -6.250,-0.3845,0.01018,0.00401,-0.0724,0.8122,0.0267 -6.000,-0.3597,0.00998,0.00375,-0.0718,0.8014,0.0271 -5.750,-0.3349,0.00981,0.00352,-0.0712,0.7905,0.0275 -5.500,-0.3101,0.00965,0.00330,-0.0705,0.7791,0.0279 -5.250,-0.2851,0.00951,0.00310,-0.0699,0.7674,0.0285 -5.000,-0.2596,0.00938,0.00292,-0.0694,0.7572,0.0289 -4.750,-0.2342,0.00926,0.00274,-0.0689,0.7478,0.0293 -4.500,-0.2084,0.00915,0.00258,-0.0685,0.7390,0.0296 -4.250,-0.1827,0.00903,0.00242,-0.0680,0.7304,0.0301 -4.000,-0.1571,0.00893,0.00227,-0.0675,0.7201,0.0311 -3.750,-0.1311,0.00882,0.00213,-0.0670,0.7114,0.0324 -3.250,-0.0790,0.00862,0.00188,-0.0662,0.6952,0.0365 -3.000,-0.0544,0.00839,0.00175,-0.0656,0.6878,0.0637 -2.750,-0.0282,0.00827,0.00166,-0.0652,0.6807,0.0758 -2.500,-0.0021,0.00820,0.00158,-0.0648,0.6723,0.0827 -2.250,0.0245,0.00812,0.00150,-0.0645,0.6649,0.0894 -2.000,0.0504,0.00802,0.00143,-0.0641,0.6570,0.1026 -1.750,0.0743,0.00769,0.00131,-0.0634,0.6498,0.1650 -1.500,0.0996,0.00750,0.00124,-0.0629,0.6427,0.2045 -1.250,0.1252,0.00736,0.00118,-0.0625,0.6358,0.2337 -1.000,0.1507,0.00720,0.00113,-0.0620,0.6279,0.2728 -0.750,0.1755,0.00702,0.00110,-0.0614,0.6204,0.3244 -0.500,0.2014,0.00693,0.00109,-0.0610,0.6115,0.3553 -0.250,0.2276,0.00688,0.00108,-0.0606,0.6020,0.3762 0.000,0.2534,0.00687,0.00108,-0.0601,0.5891,0.3946 0.250,0.2784,0.00682,0.00108,-0.0596,0.5747,0.4257 0.500,0.3028,0.00675,0.00110,-0.0588,0.5574,0.4654 0.750,0.3266,0.00676,0.00113,-0.0580,0.5328,0.5003 1.250,0.3740,0.00692,0.00125,-0.0563,0.4805,0.5569 1.500,0.3981,0.00699,0.00132,-0.0555,0.4616,0.5835 1.750,0.4222,0.00709,0.00141,-0.0547,0.4429,0.6049 2.000,0.4463,0.00716,0.00149,-0.0539,0.4282,0.6315 2.250,0.4704,0.00719,0.00158,-0.0531,0.4170,0.6624 2.500,0.4948,0.00725,0.00168,-0.0523,0.4057,0.6888 2.750,0.5193,0.00731,0.00176,-0.0516,0.3922,0.7097 3.000,0.5439,0.00739,0.00185,-0.0509,0.3779,0.7280 3.250,0.5678,0.00750,0.00195,-0.0500,0.3590,0.7478 3.500,0.5904,0.00768,0.00207,-0.0490,0.3265,0.7663 3.750,0.6088,0.00808,0.00228,-0.0472,0.2742,0.7850 4.000,0.6310,0.00824,0.00244,-0.0460,0.2603,0.8054 4.250,0.6537,0.00835,0.00259,-0.0449,0.2506,0.8292 4.500,0.6757,0.00846,0.00276,-0.0437,0.2382,0.8576 4.750,0.7014,0.00851,0.00292,-0.0432,0.2254,0.8996 5.000,0.7581,0.00916,0.00335,-0.0502,0.1599,0.9489 5.250,0.8104,0.00977,0.00377,-0.0561,0.1217,0.9761 5.500,0.8419,0.01013,0.00405,-0.0571,0.1055,0.9928 5.750,0.8717,0.01048,0.00432,-0.0578,0.0923,1.0000 6.000,0.8922,0.01071,0.00453,-0.0564,0.0856,1.0000 6.250,0.9124,0.01097,0.00475,-0.0549,0.0780,1.0000 6.500,0.9329,0.01121,0.00496,-0.0535,0.0729,1.0000 6.750,0.9532,0.01147,0.00519,-0.0520,0.0677,1.0000 7.000,0.9741,0.01169,0.00542,-0.0507,0.0644,1.0000 7.250,0.9938,0.01198,0.00567,-0.0492,0.0592,1.0000 7.500,1.0139,0.01224,0.00592,-0.0478,0.0557,1.0000 7.750,1.0344,0.01248,0.00617,-0.0464,0.0532,1.0000 8.000,1.0531,0.01280,0.00646,-0.0448,0.0484,1.0000 8.250,1.0723,0.01308,0.00675,-0.0432,0.0454,1.0000 8.500,1.0906,0.01341,0.00705,-0.0415,0.0403,1.0000 8.750,1.1054,0.01381,0.00741,-0.0391,0.0331,1.0000 9.000,1.1138,0.01444,0.00793,-0.0357,0.0197,1.0000 9.250,1.1271,0.01491,0.00839,-0.0332,0.0161,1.0000 9.500,1.1424,0.01533,0.00883,-0.0310,0.0147,1.0000 9.750,1.1574,0.01578,0.00930,-0.0290,0.0134,1.0000 10.000,1.1724,0.01627,0.00981,-0.0269,0.0123,1.0000 10.250,1.1887,0.01671,0.01028,-0.0252,0.0118,1.0000 10.500,1.2044,0.01719,0.01080,-0.0235,0.0112,1.0000 10.750,1.2194,0.01774,0.01138,-0.0217,0.0107,1.0000 11.000,1.2340,0.01833,0.01201,-0.0199,0.0102,1.0000 11.250,1.2471,0.01904,0.01275,-0.0181,0.0096,1.0000 11.500,1.2610,0.01972,0.01347,-0.0164,0.0093,1.0000 11.750,1.2755,0.02038,0.01418,-0.0150,0.0090,1.0000 12.000,1.2897,0.02109,0.01493,-0.0135,0.0087,1.0000 12.250,1.3032,0.02185,0.01575,-0.0121,0.0084,1.0000 12.500,1.3165,0.02266,0.01660,-0.0107,0.0081,1.0000 12.750,1.3284,0.02359,0.01757,-0.0092,0.0078,1.0000 13.000,1.3397,0.02458,0.01861,-0.0078,0.0075,1.0000 13.250,1.3501,0.02566,0.01974,-0.0065,0.0073,1.0000 13.500,1.3591,0.02689,0.02102,-0.0051,0.0071,1.0000 13.750,1.3674,0.02820,0.02240,-0.0037,0.0069,1.0000 14.000,1.3772,0.02943,0.02370,-0.0026,0.0068,1.0000 14.250,1.3866,0.03071,0.02504,-0.0016,0.0067,1.0000 14.500,1.3951,0.03211,0.02651,-0.0006,0.0066,1.0000 14.750,1.4016,0.03373,0.02821,0.0004,0.0065,1.0000 15.000,1.4087,0.03532,0.02987,0.0012,0.0063,1.0000 15.250,1.4144,0.03708,0.03170,0.0019,0.0063,1.0000 15.500,1.4199,0.03892,0.03361,0.0026,0.0061,1.0000 15.750,1.4228,0.04106,0.03583,0.0032,0.0061,1.0000 16.000,1.4258,0.04325,0.03811,0.0036,0.0059,1.0000 16.250,1.4291,0.04548,0.04041,0.0039,0.0058,1.0000 16.500,1.4295,0.04810,0.04312,0.0041,0.0057,1.0000 16.750,1.4293,0.05086,0.04596,0.0041,0.0056,1.0000 17.000,1.4279,0.05386,0.04904,0.0039,0.0055,1.0000 17.250,1.4269,0.05692,0.05218,0.0035,0.0054,1.0000 17.500,1.4208,0.06074,0.05611,0.0029,0.0053,1.0000 17.750,1.4147,0.06465,0.06012,0.0020,0.0053,1.0000 18.000,1.4017,0.06969,0.06528,0.0006,0.0051,1.0000 18.250,1.3945,0.07408,0.06978,-0.0008,0.0052,1.0000 18.500,1.3841,0.07900,0.07481,-0.0025,0.0051,1.0000 18.750,1.3720,0.08431,0.08024,-0.0044,0.0050,1.0000 19.000,1.3607,0.08955,0.08559,-0.0064,0.0050,1.0000 19.250,1.3428,0.09595,0.09212,-0.0089,0.0050,1.0000