Xfoil polar. Reynolds number fixed. Mach number fixed Polar key,xf-usa40b-il-500000 Airfoil,usa40b-il Reynolds number,500000 Ncrit,9 Mach,0 Max Cl/Cd,85.1147 Max Cl/Cd alpha,7.5 Url,http://airfoiltools.com/polar/csv?polar=xf-usa40b-il-500000 Alpha,Cl,Cd,Cdp,Cm,Top_Xtr,Bot_Xtr -9.500,-0.3263,0.09109,0.08872,-0.0354,1.0000,0.0448 -9.250,-0.3207,0.08936,0.08703,-0.0345,1.0000,0.0452 -9.000,-0.5348,0.04149,0.03837,-0.0761,0.9917,0.0393 -8.750,-0.5054,0.03974,0.03665,-0.0784,0.9881,0.0397 -8.500,-0.4837,0.03274,0.02917,-0.0851,0.9833,0.0377 -8.250,-0.4600,0.02774,0.02362,-0.0890,0.9769,0.0376 -8.000,-0.4265,0.02421,0.01965,-0.0926,0.9720,0.0375 -7.750,-0.3900,0.02179,0.01691,-0.0955,0.9666,0.0376 -7.500,-0.3550,0.02000,0.01487,-0.0974,0.9595,0.0378 -7.250,-0.3159,0.01852,0.01318,-0.0999,0.9558,0.0381 -7.000,-0.2857,0.01748,0.01197,-0.1005,0.9470,0.0385 -6.750,-0.2479,0.01652,0.01086,-0.1024,0.9413,0.0388 -6.500,-0.2161,0.01536,0.00961,-0.1033,0.9306,0.0394 -6.250,-0.1801,0.01451,0.00875,-0.1049,0.9201,0.0401 -6.000,-0.1447,0.01391,0.00810,-0.1062,0.9066,0.0409 -5.750,-0.1140,0.01338,0.00748,-0.1065,0.8883,0.0415 -5.500,-0.0859,0.01293,0.00694,-0.1062,0.8665,0.0422 -5.250,-0.0588,0.01253,0.00643,-0.1058,0.8415,0.0429 -5.000,-0.0324,0.01221,0.00596,-0.1051,0.8146,0.0435 -4.750,-0.0066,0.01195,0.00555,-0.1043,0.7876,0.0442 -4.500,0.0180,0.01151,0.00501,-0.1035,0.7648,0.0453 -4.250,0.0437,0.01130,0.00472,-0.1028,0.7457,0.0465 -4.000,0.0698,0.01114,0.00447,-0.1021,0.7282,0.0479 -3.750,0.0962,0.01102,0.00424,-0.1015,0.7119,0.0496 -3.500,0.1221,0.01074,0.00393,-0.1009,0.6969,0.0517 -3.250,0.1485,0.01061,0.00374,-0.1003,0.6821,0.0542 -3.000,0.1748,0.01044,0.00350,-0.0996,0.6659,0.0575 -2.750,0.2012,0.01031,0.00333,-0.0990,0.6477,0.0623 -2.500,0.2273,0.01015,0.00313,-0.0984,0.6267,0.0704 -2.250,0.2532,0.00998,0.00293,-0.0977,0.6019,0.0830 -2.000,0.2783,0.00987,0.00276,-0.0970,0.5731,0.0987 -1.750,0.3031,0.00976,0.00264,-0.0962,0.5390,0.1285 -1.500,0.3273,0.00971,0.00263,-0.0954,0.5016,0.1868 -1.250,0.3521,0.00981,0.00263,-0.0946,0.4661,0.2169 -1.000,0.3772,0.00988,0.00264,-0.0940,0.4365,0.2444 -0.750,0.4026,0.00991,0.00266,-0.0934,0.4133,0.2809 -0.500,0.4281,0.00987,0.00271,-0.0928,0.3950,0.3433 -0.250,0.4537,0.00978,0.00277,-0.0923,0.3800,0.4204 0.000,0.4787,0.00965,0.00286,-0.0917,0.3672,0.5125 0.250,0.5033,0.00961,0.00301,-0.0908,0.3554,0.6017 0.500,0.5292,0.00966,0.00314,-0.0901,0.3454,0.6552 1.000,0.5809,0.00990,0.00338,-0.0886,0.3278,0.7166 1.250,0.6065,0.01006,0.00351,-0.0879,0.3200,0.7381 1.500,0.6328,0.01018,0.00362,-0.0873,0.3134,0.7557 1.750,0.6587,0.01030,0.00373,-0.0866,0.3069,0.7732 2.000,0.6837,0.01050,0.00387,-0.0857,0.3003,0.7895 2.250,0.7101,0.01057,0.00396,-0.0852,0.2953,0.8046 2.500,0.7357,0.01067,0.00406,-0.0844,0.2897,0.8191 2.750,0.7601,0.01083,0.00419,-0.0835,0.2839,0.8352 3.000,0.7857,0.01090,0.00429,-0.0828,0.2796,0.8513 3.250,0.8109,0.01093,0.00438,-0.0820,0.2752,0.8723 3.500,0.8410,0.01094,0.00449,-0.0823,0.2707,0.9177 3.750,0.8781,0.01124,0.00471,-0.0843,0.2654,1.0000 4.000,0.9056,0.01138,0.00485,-0.0841,0.2624,1.0000 4.250,0.9325,0.01156,0.00500,-0.0838,0.2589,1.0000 4.500,0.9588,0.01177,0.00517,-0.0834,0.2555,1.0000 4.750,0.9844,0.01205,0.00538,-0.0829,0.2521,1.0000 5.000,1.0095,0.01237,0.00565,-0.0823,0.2486,1.0000 5.250,1.0361,0.01254,0.00583,-0.0820,0.2463,1.0000 5.500,1.0622,0.01273,0.00602,-0.0815,0.2435,1.0000 5.750,1.0878,0.01295,0.00622,-0.0810,0.2407,1.0000 6.000,1.1129,0.01321,0.00645,-0.0805,0.2380,1.0000 6.250,1.1373,0.01355,0.00674,-0.0798,0.2353,1.0000 6.500,1.1617,0.01393,0.00710,-0.0792,0.2327,1.0000 6.750,1.1872,0.01412,0.00732,-0.0786,0.2309,1.0000 7.000,1.2123,0.01433,0.00756,-0.0781,0.2286,1.0000 7.250,1.2371,0.01457,0.00781,-0.0775,0.2264,1.0000 7.500,1.2614,0.01482,0.00805,-0.0768,0.2240,1.0000 7.750,1.2851,0.01512,0.00834,-0.0761,0.2218,1.0000 8.000,1.3083,0.01553,0.00872,-0.0753,0.2195,1.0000 8.250,1.3317,0.01601,0.00919,-0.0746,0.2174,1.0000 8.500,1.3556,0.01624,0.00948,-0.0739,0.2162,1.0000 8.750,1.3791,0.01650,0.00979,-0.0731,0.2146,1.0000 9.000,1.4022,0.01677,0.01009,-0.0723,0.2127,1.0000 9.250,1.4248,0.01704,0.01040,-0.0714,0.2107,1.0000 9.500,1.4471,0.01735,0.01073,-0.0705,0.2090,1.0000 9.750,1.4688,0.01769,0.01108,-0.0695,0.2073,1.0000 10.000,1.4899,0.01810,0.01148,-0.0685,0.2053,1.0000 10.250,1.5116,0.01871,0.01208,-0.0677,0.2031,1.0000 10.500,1.5324,0.01907,0.01251,-0.0666,0.2020,1.0000 10.750,1.5517,0.01937,0.01289,-0.0652,0.2008,1.0000 11.000,1.5704,0.01971,0.01329,-0.0637,0.1995,1.0000 11.250,1.5887,0.02007,0.01372,-0.0622,0.1981,1.0000 11.500,1.6063,0.02042,0.01412,-0.0607,0.1964,1.0000 11.750,1.6226,0.02074,0.01448,-0.0589,0.1943,1.0000 12.000,1.6379,0.02109,0.01484,-0.0571,0.1919,1.0000 12.250,1.6539,0.02170,0.01543,-0.0556,0.1891,1.0000 12.500,1.6686,0.02212,0.01594,-0.0538,0.1871,1.0000 12.750,1.6831,0.02250,0.01642,-0.0521,0.1850,1.0000 13.000,1.6974,0.02292,0.01693,-0.0504,0.1826,1.0000 13.250,1.7112,0.02340,0.01747,-0.0488,0.1801,1.0000 13.500,1.7238,0.02401,0.01810,-0.0471,0.1777,1.0000 13.750,1.7351,0.02483,0.01892,-0.0454,0.1751,1.0000 14.000,1.7480,0.02548,0.01969,-0.0440,0.1729,1.0000 14.250,1.7609,0.02613,0.02045,-0.0426,0.1702,1.0000 14.500,1.7729,0.02689,0.02129,-0.0413,0.1672,1.0000 14.750,1.7822,0.02787,0.02229,-0.0399,0.1640,1.0000 15.000,1.7895,0.02907,0.02353,-0.0385,0.1609,1.0000 15.250,1.8023,0.02996,0.02455,-0.0376,0.1575,1.0000 15.500,1.8111,0.03116,0.02583,-0.0366,0.1534,1.0000 15.750,1.8152,0.03281,0.02749,-0.0355,0.1497,1.0000 16.000,1.8241,0.03418,0.02897,-0.0348,0.1458,1.0000 16.250,1.8294,0.03590,0.03077,-0.0341,0.1408,1.0000 16.500,1.8294,0.03819,0.03309,-0.0335,0.1361,1.0000 16.750,1.8315,0.04039,0.03537,-0.0331,0.1294,1.0000 17.000,1.8267,0.04337,0.03840,-0.0328,0.1235,1.0000 17.250,1.8185,0.04686,0.04193,-0.0329,0.1164,1.0000 17.500,1.8065,0.05095,0.04608,-0.0332,0.1102,1.0000 18.000,1.7685,0.06158,0.05687,-0.0355,0.1004,1.0000 18.250,1.7442,0.06805,0.06343,-0.0375,0.0969,1.0000 18.500,1.7160,0.07538,0.07088,-0.0401,0.0944,1.0000 18.750,1.6900,0.08264,0.07827,-0.0428,0.0920,1.0000 19.000,1.6607,0.09059,0.08635,-0.0461,0.0900,1.0000 19.250,1.6298,0.09900,0.09487,-0.0497,0.0881,1.0000