Xfoil polar. Reynolds number fixed. Mach number fixed Polar key,xf-usa31-il-100000-n5 Airfoil,usa31-il Reynolds number,100000 Ncrit,5 Mach,0 Max Cl/Cd,40.8396 Max Cl/Cd alpha,7 Url,http://airfoiltools.com/polar/csv?polar=xf-usa31-il-100000-n5 Alpha,Cl,Cd,Cdp,Cm,Top_Xtr,Bot_Xtr -8.250,0.1051,0.10280,0.09750,-0.1069,0.8635,0.0764 -8.000,0.1190,0.10002,0.09471,-0.1088,0.8603,0.0784 -7.250,0.0782,0.09738,0.09220,-0.1062,0.8329,0.0831 -7.000,0.0882,0.09393,0.08875,-0.1068,0.8288,0.0838 -6.750,0.1257,0.08986,0.08466,-0.1072,0.8280,0.0863 -6.500,0.1207,0.08867,0.08350,-0.1043,0.8189,0.0880 -6.250,0.1203,0.08679,0.08163,-0.1037,0.8123,0.0910 -6.000,0.0956,0.08613,0.08098,-0.1060,0.7986,0.0944 -5.750,0.1074,0.08253,0.07737,-0.1078,0.7942,0.0951 -5.500,0.1285,0.07912,0.07393,-0.1074,0.7921,0.0961 -5.000,0.1323,0.06844,0.06303,-0.1135,0.7751,0.0645 -4.500,0.1480,0.06521,0.05981,-0.1091,0.7603,0.0607 -4.000,0.1818,0.04716,0.04098,-0.1245,0.7465,0.0505 -3.750,0.2070,0.04253,0.03598,-0.1277,0.7419,0.0501 -3.500,0.2375,0.03851,0.03151,-0.1305,0.7391,0.0495 -3.250,0.2521,0.03638,0.02900,-0.1296,0.7316,0.0491 -3.000,0.2730,0.03442,0.02663,-0.1292,0.7255,0.0488 -2.750,0.3037,0.03243,0.02421,-0.1298,0.7223,0.0486 -2.500,0.3384,0.03064,0.02203,-0.1308,0.7199,0.0486 -2.250,0.3457,0.03048,0.02168,-0.1275,0.7096,0.0487 -2.000,0.3766,0.02929,0.02021,-0.1276,0.7057,0.0489 -1.750,0.4131,0.02806,0.01870,-0.1286,0.7030,0.0496 -1.500,0.4254,0.02806,0.01852,-0.1259,0.6940,0.0504 -1.250,0.4543,0.02726,0.01768,-0.1258,0.6892,0.0513 -1.000,0.4910,0.02631,0.01667,-0.1269,0.6859,0.0527 -0.750,0.5069,0.02628,0.01660,-0.1247,0.6780,0.0532 -0.500,0.5341,0.02587,0.01611,-0.1242,0.6722,0.0538 -0.250,0.5710,0.02519,0.01533,-0.1253,0.6685,0.0548 0.000,0.5900,0.02521,0.01529,-0.1236,0.6611,0.0557 0.250,0.6160,0.02503,0.01501,-0.1230,0.6547,0.0568 0.500,0.6546,0.02443,0.01432,-0.1246,0.6505,0.0587 0.750,0.6750,0.02449,0.01434,-0.1233,0.6430,0.0617 1.000,0.7026,0.02433,0.01410,-0.1231,0.6364,0.0657 1.250,0.7441,0.02375,0.01344,-0.1253,0.6319,0.0739 1.500,0.7717,0.02358,0.01364,-0.1258,0.6243,0.1539 1.750,0.7879,0.02397,0.01430,-0.1233,0.6172,0.2425 2.000,0.8247,0.02403,0.01415,-0.1243,0.6124,0.2783 2.250,0.8312,0.02477,0.01487,-0.1206,0.6037,0.2917 2.500,0.8572,0.02502,0.01498,-0.1201,0.5974,0.3074 2.750,0.8876,0.02512,0.01499,-0.1203,0.5917,0.3202 3.000,0.8952,0.02576,0.01565,-0.1169,0.5831,0.3300 3.250,0.9226,0.02587,0.01568,-0.1167,0.5772,0.3470 3.500,0.9427,0.02618,0.01590,-0.1154,0.5706,0.3579 3.750,0.9581,0.02648,0.01621,-0.1135,0.5630,0.3618 4.000,0.9904,0.02636,0.01597,-0.1143,0.5574,0.3659 4.250,1.0040,0.02684,0.01642,-0.1122,0.5500,0.3683 4.500,1.0245,0.02715,0.01666,-0.1112,0.5431,0.3712 4.750,1.0616,0.02702,0.01642,-0.1129,0.5380,0.3747 5.000,1.0712,0.02773,0.01717,-0.1104,0.5299,0.3768 5.250,1.0972,0.02796,0.01734,-0.1105,0.5236,0.3791 5.500,1.1300,0.02801,0.01729,-0.1116,0.5183,0.3816 5.750,1.1389,0.02879,0.01812,-0.1090,0.5107,0.3833 6.000,1.1642,0.02903,0.01829,-0.1089,0.5048,0.3860 6.250,1.1908,0.02927,0.01852,-0.1091,0.4991,0.3888 6.500,1.2029,0.03000,0.01931,-0.1073,0.4921,0.3913 6.750,1.2289,0.03020,0.01947,-0.1073,0.4865,0.3942 7.000,1.2501,0.03061,0.01988,-0.1067,0.4809,0.3968 7.250,1.2601,0.03142,0.02074,-0.1045,0.4740,0.3988 7.500,1.2847,0.03167,0.02097,-0.1043,0.4688,0.4010 7.750,1.3047,0.03212,0.02144,-0.1036,0.4631,0.4034 8.000,1.3128,0.03306,0.02246,-0.1013,0.4565,0.4055 8.250,1.3356,0.03335,0.02272,-0.1009,0.4509,0.4090 8.500,1.3530,0.03392,0.02330,-0.0998,0.4454,0.4126 8.750,1.3582,0.03502,0.02451,-0.0973,0.4384,0.4150 9.000,1.3804,0.03531,0.02479,-0.0968,0.4327,0.4190 9.250,1.3924,0.03615,0.02568,-0.0952,0.4267,0.4224 9.500,1.3974,0.03735,0.02696,-0.0929,0.4199,0.4248 9.750,1.4188,0.03769,0.02729,-0.0923,0.4146,0.4285 10.000,1.4290,0.03871,0.02838,-0.0907,0.4090,0.4316 10.250,1.4313,0.04018,0.02997,-0.0883,0.4025,0.4347 10.500,1.4499,0.04070,0.03050,-0.0876,0.3973,0.4396 10.750,1.4622,0.04163,0.03150,-0.0863,0.3919,0.4450 11.000,1.4587,0.04359,0.03362,-0.0836,0.3853,0.4499 11.750,1.5175,0.04766,0.03867,-0.0868,0.3667,1.0000 12.000,1.5321,0.04842,0.03942,-0.0857,0.3615,1.0000 12.250,1.5341,0.05023,0.04130,-0.0838,0.3556,1.0000 12.500,1.5260,0.05294,0.04414,-0.0814,0.3486,1.0000 12.750,1.5430,0.05343,0.04459,-0.0806,0.3430,1.0000 13.000,1.5282,0.05693,0.04826,-0.0781,0.3357,1.0000 13.250,1.5272,0.05923,0.05064,-0.0766,0.3292,1.0000 13.500,1.5422,0.05990,0.05128,-0.0757,0.3235,1.0000 13.750,1.5177,0.06482,0.05640,-0.0736,0.3152,1.0000 14.000,1.5315,0.06557,0.05711,-0.0727,0.3089,1.0000 14.250,1.5094,0.07058,0.06229,-0.0712,0.3008,1.0000 14.500,1.5114,0.07280,0.06456,-0.0703,0.2940,1.0000 14.750,1.5071,0.07589,0.06771,-0.0694,0.2874,1.0000 15.000,1.4931,0.08030,0.07224,-0.0687,0.2797,1.0000 15.250,1.5156,0.07997,0.07185,-0.0680,0.2750,1.0000 15.500,1.4798,0.08747,0.07958,-0.0676,0.2665,1.0000 15.750,1.4880,0.08907,0.08120,-0.0671,0.2613,1.0000 16.000,1.4832,0.09251,0.08471,-0.0668,0.2553,1.0000 16.250,1.4666,0.09772,0.09005,-0.0668,0.2481,1.0000 16.500,1.4867,0.09758,0.08990,-0.0662,0.2439,1.0000 16.750,1.4557,0.10504,0.09753,-0.0669,0.2362,1.0000 17.000,1.4589,0.10743,0.09996,-0.0668,0.2306,1.0000 17.250,1.4750,0.10783,0.10035,-0.0663,0.2262,1.0000 17.500,1.4396,0.11630,0.10901,-0.0678,0.2183,1.0000 17.750,1.4566,0.11652,0.10923,-0.0674,0.2138,1.0000