Xfoil polar. Reynolds number fixed. Mach number fixed Polar key,xf-usa41-il-1000000 Airfoil,usa41-il Reynolds number,1000000 Ncrit,9 Mach,0 Max Cl/Cd,129.191 Max Cl/Cd alpha,4 Url,http://airfoiltools.com/polar/csv?polar=xf-usa41-il-1000000 Alpha,Cl,Cd,Cdp,Cm,Top_Xtr,Bot_Xtr -7.750,-0.3487,0.08614,0.08460,-0.0235,1.0000,0.0122 -7.500,-0.3539,0.08404,0.08254,-0.0222,1.0000,0.0122 -7.250,-0.3551,0.08206,0.08060,-0.0218,0.9994,0.0130 -7.000,-0.3210,0.07486,0.07338,-0.0357,0.9950,0.0147 -6.750,-0.2948,0.06923,0.06774,-0.0442,0.9903,0.0148 -6.500,-0.2650,0.06343,0.06190,-0.0533,0.9857,0.0148 -6.250,-0.2347,0.05678,0.05520,-0.0631,0.9797,0.0148 -6.000,-0.1854,0.01919,0.01619,-0.0994,0.9658,0.0151 -5.750,-0.1542,0.01818,0.01507,-0.1010,0.9603,0.0157 -5.500,-0.1208,0.01842,0.01535,-0.1023,0.9554,0.0162 -5.250,-0.0903,0.01789,0.01473,-0.1032,0.9470,0.0171 -5.000,-0.0606,0.01630,0.01281,-0.1040,0.9378,0.0186 -4.500,-0.0076,0.01332,0.00922,-0.1041,0.9171,0.0210 -4.250,0.0189,0.01302,0.00889,-0.1040,0.9071,0.0219 -4.000,0.0454,0.01271,0.00849,-0.1037,0.8975,0.0232 -3.750,0.0714,0.01215,0.00777,-0.1032,0.8873,0.0244 -3.500,0.0975,0.01151,0.00696,-0.1026,0.8775,0.0251 -3.250,0.1241,0.01120,0.00651,-0.1022,0.8677,0.0259 -3.000,0.1491,0.01001,0.00508,-0.1016,0.8570,0.0278 -2.750,0.1748,0.00935,0.00436,-0.1011,0.8455,0.0288 -2.500,0.2009,0.00887,0.00378,-0.1005,0.8329,0.0292 -2.250,0.2269,0.00844,0.00326,-0.1000,0.8187,0.0294 -2.000,0.2528,0.00808,0.00281,-0.0993,0.8021,0.0297 -1.500,0.3043,0.00761,0.00214,-0.0981,0.7634,0.0314 -1.250,0.3298,0.00745,0.00187,-0.0974,0.7416,0.0322 -1.000,0.3555,0.00733,0.00165,-0.0968,0.7196,0.0329 -0.750,0.3812,0.00727,0.00147,-0.0962,0.6974,0.0334 -0.500,0.4071,0.00722,0.00132,-0.0956,0.6741,0.0338 -0.250,0.4329,0.00721,0.00120,-0.0950,0.6500,0.0341 0.000,0.4588,0.00722,0.00110,-0.0945,0.6264,0.0345 0.250,0.4848,0.00726,0.00104,-0.0940,0.6030,0.0352 0.750,0.5370,0.00734,0.00092,-0.0930,0.5628,0.0381 1.000,0.5634,0.00738,0.00091,-0.0926,0.5459,0.0450 1.250,0.5890,0.00722,0.00099,-0.0922,0.5310,0.1575 1.500,0.6155,0.00729,0.00107,-0.0918,0.5175,0.1836 1.750,0.6420,0.00737,0.00114,-0.0915,0.5043,0.1976 2.000,0.6684,0.00745,0.00120,-0.0911,0.4907,0.2106 2.250,0.6948,0.00752,0.00126,-0.0908,0.4770,0.2221 2.750,0.7468,0.00751,0.00142,-0.0900,0.4502,0.3231 3.000,0.7900,0.00633,0.00167,-0.0940,0.4352,1.0000 3.250,0.8163,0.00646,0.00175,-0.0936,0.4231,1.0000 3.500,0.8424,0.00659,0.00186,-0.0932,0.4120,1.0000 3.750,0.8684,0.00674,0.00196,-0.0928,0.3998,1.0000 4.000,0.8940,0.00692,0.00208,-0.0923,0.3830,1.0000 4.250,0.9189,0.00716,0.00221,-0.0917,0.3598,1.0000 4.500,0.9435,0.00744,0.00238,-0.0911,0.3336,1.0000 4.750,0.9688,0.00765,0.00254,-0.0906,0.3173,1.0000 5.000,0.9939,0.00788,0.00271,-0.0901,0.2985,1.0000 5.250,1.0181,0.00820,0.00292,-0.0894,0.2717,1.0000 5.500,1.0408,0.00867,0.00320,-0.0885,0.2301,1.0000 5.750,1.0603,0.00950,0.00366,-0.0872,0.1626,1.0000 6.000,1.0749,0.01091,0.00450,-0.0852,0.0612,1.0000 6.250,1.0944,0.01180,0.00516,-0.0838,0.0227,1.0000 6.500,1.1180,0.01219,0.00558,-0.0830,0.0187,1.0000 6.750,1.1409,0.01265,0.00606,-0.0821,0.0162,1.0000 7.000,1.1629,0.01323,0.00671,-0.0810,0.0144,1.0000 7.250,1.1860,0.01363,0.00715,-0.0802,0.0135,1.0000 7.500,1.2084,0.01409,0.00765,-0.0793,0.0126,1.0000 7.750,1.2302,0.01460,0.00820,-0.0783,0.0116,1.0000 8.000,1.2462,0.01571,0.00943,-0.0763,0.0104,1.0000 8.250,1.2669,0.01628,0.01006,-0.0751,0.0100,1.0000 8.500,1.2870,0.01687,0.01071,-0.0739,0.0096,1.0000 8.750,1.3060,0.01754,0.01145,-0.0725,0.0092,1.0000 9.000,1.3243,0.01823,0.01220,-0.0710,0.0088,1.0000 9.250,1.3411,0.01903,0.01308,-0.0693,0.0085,1.0000 9.500,1.3586,0.01971,0.01380,-0.0678,0.0080,1.0000 9.750,1.3740,0.02053,0.01466,-0.0660,0.0077,1.0000 10.000,1.3783,0.02224,0.01648,-0.0626,0.0072,1.0000 10.250,1.3843,0.02365,0.01802,-0.0593,0.0069,1.0000 10.500,1.3953,0.02442,0.01886,-0.0568,0.0068,1.0000 10.750,1.4034,0.02544,0.01999,-0.0540,0.0066,1.0000 11.000,1.4112,0.02651,0.02115,-0.0513,0.0064,1.0000 11.250,1.4168,0.02784,0.02259,-0.0485,0.0063,1.0000 11.500,1.4206,0.02943,0.02430,-0.0458,0.0061,1.0000 11.750,1.4247,0.03106,0.02605,-0.0435,0.0061,1.0000 12.000,1.4297,0.03253,0.02762,-0.0414,0.0058,1.0000 12.250,1.4338,0.03417,0.02936,-0.0396,0.0057,1.0000 12.500,1.4337,0.03646,0.03179,-0.0376,0.0056,1.0000 12.750,1.4355,0.03850,0.03395,-0.0362,0.0056,1.0000 13.000,1.4394,0.04021,0.03574,-0.0353,0.0054,1.0000 13.250,1.4319,0.04378,0.03953,-0.0338,0.0054,1.0000 13.500,1.4320,0.04621,0.04204,-0.0334,0.0053,1.0000 13.750,1.4332,0.04863,0.04454,-0.0334,0.0051,1.0000 14.000,1.4258,0.05247,0.04854,-0.0333,0.0051,1.0000 14.250,1.4192,0.05634,0.05254,-0.0338,0.0051,1.0000 14.500,1.4133,0.06021,0.05650,-0.0347,0.0049,1.0000 14.750,1.4021,0.06516,0.06163,-0.0359,0.0050,1.0000 15.000,1.3892,0.07061,0.06724,-0.0377,0.0049,1.0000 15.250,1.3731,0.07683,0.07362,-0.0400,0.0049,1.0000 15.500,1.3570,0.08336,0.08031,-0.0428,0.0048,1.0000 15.750,1.3390,0.09058,0.08770,-0.0462,0.0048,1.0000 16.000,1.3270,0.09702,0.09428,-0.0494,0.0049,1.0000 16.250,1.3090,0.10490,0.10232,-0.0536,0.0049,1.0000 16.500,1.2901,0.11337,0.11094,-0.0583,0.0049,1.0000 16.750,1.2691,0.12265,0.12037,-0.0636,0.0048,1.0000 17.000,1.2571,0.13037,0.12823,-0.0682,0.0049,1.0000 17.250,1.2364,0.14060,0.13862,-0.0743,0.0050,1.0000 17.500,1.2176,0.15076,0.14890,-0.0806,0.0049,1.0000