Xfoil polar. Reynolds number fixed. Mach number fixed Polar key,xf-naca0021-il-1000000 Airfoil,naca0021-il Reynolds number,1000000 Ncrit,9 Mach,0 Max Cl/Cd,74.74 Max Cl/Cd alpha,8.5 Url,http://airfoiltools.com/polar/csv?polar=xf-naca0021-il-1000000 Alpha,Cl,Cd,Cdp,Cm,Top_Xtr,Bot_Xtr -19.750,-1.3432,0.07827,0.07364,-0.0368,1.0000,0.0544 -19.500,-1.3520,0.07412,0.06942,-0.0380,1.0000,0.0553 -19.250,-1.3588,0.07026,0.06549,-0.0390,1.0000,0.0562 -19.000,-1.3630,0.06671,0.06187,-0.0399,1.0000,0.0572 -18.750,-1.3640,0.06359,0.05867,-0.0407,1.0000,0.0580 -18.500,-1.3727,0.05963,0.05465,-0.0415,1.0000,0.0591 -18.250,-1.3785,0.05608,0.05105,-0.0422,1.0000,0.0602 -18.000,-1.3809,0.05296,0.04787,-0.0427,1.0000,0.0613 -17.750,-1.3805,0.05018,0.04503,-0.0430,1.0000,0.0625 -17.500,-1.3775,0.04772,0.04250,-0.0433,1.0000,0.0636 -17.250,-1.3782,0.04492,0.03965,-0.0435,1.0000,0.0649 -17.000,-1.3782,0.04225,0.03694,-0.0436,1.0000,0.0663 -16.750,-1.3750,0.03997,0.03462,-0.0436,1.0000,0.0678 -16.500,-1.3687,0.03803,0.03263,-0.0435,1.0000,0.0692 -16.250,-1.3613,0.03623,0.03077,-0.0433,1.0000,0.0705 -16.000,-1.3583,0.03408,0.02860,-0.0429,1.0000,0.0723 -15.750,-1.3521,0.03228,0.02677,-0.0425,1.0000,0.0741 -15.500,-1.3428,0.03079,0.02525,-0.0420,1.0000,0.0759 -15.250,-1.3326,0.02943,0.02384,-0.0415,1.0000,0.0776 -15.000,-1.3257,0.02784,0.02225,-0.0407,1.0000,0.0797 -14.750,-1.3161,0.02652,0.02091,-0.0399,1.0000,0.0818 -14.500,-1.3036,0.02546,0.01981,-0.0392,1.0000,0.0837 -14.250,-1.2929,0.02431,0.01864,-0.0383,1.0000,0.0858 -14.000,-1.2826,0.02319,0.01751,-0.0372,1.0000,0.0882 -13.750,-1.2700,0.02226,0.01657,-0.0361,1.0000,0.0905 -13.500,-1.2556,0.02150,0.01577,-0.0351,1.0000,0.0925 -13.250,-1.2456,0.02055,0.01483,-0.0335,1.0000,0.0953 -13.000,-1.2336,0.01979,0.01407,-0.0319,1.0000,0.0980 -12.750,-1.2204,0.01920,0.01346,-0.0303,1.0000,0.1004 -12.500,-1.2131,0.01851,0.01277,-0.0277,1.0000,0.1034 -12.250,-1.2076,0.01796,0.01222,-0.0245,1.0000,0.1063 -12.000,-1.2041,0.01754,0.01179,-0.0208,1.0000,0.1087 -11.750,-1.2064,0.01719,0.01142,-0.0159,1.0000,0.1109 -11.500,-1.1882,0.01662,0.01088,-0.0150,0.9987,0.1150 -11.250,-1.1585,0.01613,0.01039,-0.0162,0.9967,0.1191 -11.000,-1.1294,0.01557,0.00986,-0.0173,0.9946,0.1242 -10.750,-1.0982,0.01510,0.00941,-0.0186,0.9929,0.1293 -10.500,-1.0669,0.01459,0.00894,-0.0201,0.9915,0.1352 -10.250,-1.0385,0.01417,0.00853,-0.0207,0.9880,0.1407 -10.000,-1.0087,0.01368,0.00809,-0.0217,0.9848,0.1472 -9.750,-0.9774,0.01330,0.00772,-0.0228,0.9815,0.1534 -9.500,-0.9478,0.01283,0.00731,-0.0237,0.9781,0.1608 -9.250,-0.9247,0.01253,0.00701,-0.0229,0.9702,0.1663 -9.000,-0.9015,0.01212,0.00664,-0.0222,0.9633,0.1736 -8.750,-0.8817,0.01186,0.00638,-0.0207,0.9536,0.1793 -8.500,-0.8619,0.01154,0.00607,-0.0192,0.9449,0.1862 -8.250,-0.8432,0.01131,0.00585,-0.0174,0.9340,0.1926 -8.000,-0.8229,0.01107,0.00561,-0.0159,0.9245,0.1994 -7.750,-0.8009,0.01083,0.00538,-0.0147,0.9138,0.2067 -7.500,-0.7780,0.01061,0.00516,-0.0137,0.9038,0.2140 -7.250,-0.7551,0.01040,0.00495,-0.0128,0.8925,0.2220 -7.000,-0.7311,0.01020,0.00476,-0.0120,0.8818,0.2297 -6.750,-0.7074,0.01001,0.00456,-0.0111,0.8700,0.2383 -6.500,-0.6827,0.00983,0.00438,-0.0105,0.8585,0.2464 -6.250,-0.6583,0.00966,0.00420,-0.0098,0.8462,0.2553 -6.000,-0.6331,0.00950,0.00405,-0.0092,0.8337,0.2639 -5.750,-0.6081,0.00935,0.00389,-0.0086,0.8212,0.2732 -5.500,-0.5827,0.00922,0.00375,-0.0080,0.8077,0.2819 -5.250,-0.5571,0.00908,0.00361,-0.0075,0.7947,0.2916 -5.000,-0.5317,0.00897,0.00348,-0.0070,0.7808,0.3008 -4.750,-0.5056,0.00885,0.00336,-0.0065,0.7672,0.3107 -4.500,-0.4799,0.00874,0.00324,-0.0061,0.7538,0.3207 -4.250,-0.4538,0.00866,0.00314,-0.0056,0.7393,0.3307 -4.000,-0.4278,0.00855,0.00304,-0.0052,0.7258,0.3413 -3.750,-0.4013,0.00849,0.00296,-0.0048,0.7121,0.3511 -3.500,-0.3754,0.00839,0.00286,-0.0044,0.6979,0.3621 -3.250,-0.3483,0.00835,0.00280,-0.0041,0.6846,0.3718 -3.000,-0.3226,0.00827,0.00272,-0.0036,0.6703,0.3835 -2.500,-0.2691,0.00816,0.00260,-0.0029,0.6438,0.4047 -2.250,-0.2421,0.00814,0.00255,-0.0027,0.6298,0.4143 -2.000,-0.2155,0.00807,0.00250,-0.0023,0.6173,0.4259 -1.750,-0.1886,0.00807,0.00246,-0.0020,0.6037,0.4358 -1.500,-0.1618,0.00801,0.00242,-0.0017,0.5909,0.4475 -1.250,-0.1347,0.00800,0.00240,-0.0015,0.5784,0.4580 -1.000,-0.1080,0.00798,0.00237,-0.0011,0.5652,0.4697 -0.750,-0.0808,0.00796,0.00235,-0.0009,0.5532,0.4808 -0.250,-0.0269,0.00793,0.00233,-0.0003,0.5288,0.5046 0.000,0.0000,0.00796,0.00233,0.0000,0.5163,0.5163 0.250,0.0269,0.00793,0.00233,0.0003,0.5046,0.5288 0.750,0.0808,0.00796,0.00235,0.0009,0.4808,0.5533 1.000,0.1080,0.00798,0.00237,0.0011,0.4698,0.5652 1.250,0.1347,0.00800,0.00240,0.0015,0.4580,0.5784 1.500,0.1618,0.00801,0.00242,0.0017,0.4475,0.5910 1.750,0.1886,0.00807,0.00246,0.0020,0.4359,0.6037 2.000,0.2155,0.00807,0.00250,0.0023,0.4260,0.6174 2.250,0.2421,0.00814,0.00255,0.0027,0.4143,0.6298 2.500,0.2692,0.00816,0.00260,0.0029,0.4047,0.6438 3.000,0.3227,0.00827,0.00272,0.0036,0.3834,0.6703 3.250,0.3483,0.00835,0.00280,0.0041,0.3718,0.6846 3.500,0.3754,0.00839,0.00286,0.0043,0.3621,0.6979 3.750,0.4014,0.00849,0.00296,0.0048,0.3511,0.7122 4.000,0.4279,0.00855,0.00304,0.0052,0.3413,0.7258 4.250,0.4539,0.00866,0.00314,0.0056,0.3308,0.7394 4.500,0.4800,0.00874,0.00324,0.0060,0.3207,0.7538 4.750,0.5058,0.00885,0.00336,0.0065,0.3107,0.7673 5.000,0.5318,0.00897,0.00348,0.0069,0.3008,0.7809 5.250,0.5573,0.00908,0.00361,0.0075,0.2915,0.7947 5.500,0.5829,0.00922,0.00375,0.0080,0.2819,0.8077 5.750,0.6083,0.00935,0.00389,0.0085,0.2732,0.8212 6.000,0.6333,0.00950,0.00405,0.0091,0.2638,0.8337 6.250,0.6585,0.00966,0.00420,0.0097,0.2553,0.8462 6.500,0.6829,0.00983,0.00438,0.0104,0.2464,0.8584 6.750,0.7076,0.01001,0.00456,0.0111,0.2382,0.8700 7.000,0.7314,0.01020,0.00476,0.0119,0.2296,0.8818 7.250,0.7554,0.01040,0.00495,0.0127,0.2220,0.8925 7.500,0.7784,0.01061,0.00516,0.0137,0.2139,0.9037 7.750,0.8013,0.01083,0.00538,0.0146,0.2067,0.9137 8.000,0.8233,0.01107,0.00561,0.0158,0.1993,0.9244 8.250,0.8438,0.01131,0.00585,0.0172,0.1925,0.9339 8.500,0.8625,0.01154,0.00607,0.0191,0.1861,0.9447 8.750,0.8823,0.01186,0.00638,0.0206,0.1793,0.9535 9.000,0.9021,0.01212,0.00664,0.0221,0.1735,0.9632 9.250,0.9253,0.01252,0.00700,0.0228,0.1663,0.9701 9.500,0.9483,0.01283,0.00730,0.0236,0.1609,0.9780 9.750,0.9780,0.01329,0.00772,0.0227,0.1533,0.9815 10.000,1.0093,0.01368,0.00808,0.0216,0.1472,0.9849 10.250,1.0390,0.01416,0.00853,0.0206,0.1407,0.9881 10.500,1.0676,0.01458,0.00893,0.0199,0.1352,0.9915 10.750,1.0990,0.01510,0.00940,0.0185,0.1293,0.9929 11.000,1.1302,0.01556,0.00985,0.0171,0.1241,0.9947 11.250,1.1594,0.01612,0.01038,0.0160,0.1191,0.9968 11.500,1.1891,0.01661,0.01086,0.0149,0.1149,0.9988 11.750,1.2063,0.01717,0.01140,0.0159,0.1109,1.0000 12.000,1.2043,0.01752,0.01177,0.0208,0.1087,1.0000 12.250,1.2080,0.01794,0.01220,0.0245,0.1062,1.0000 12.500,1.2137,0.01849,0.01275,0.0276,0.1033,1.0000 12.750,1.2213,0.01918,0.01343,0.0302,0.1004,1.0000 13.000,1.2347,0.01977,0.01405,0.0318,0.0980,1.0000 13.250,1.2468,0.02053,0.01481,0.0333,0.0953,1.0000 13.500,1.2570,0.02148,0.01575,0.0348,0.0924,1.0000 13.750,1.2716,0.02223,0.01654,0.0358,0.0904,1.0000 14.000,1.2842,0.02316,0.01748,0.0369,0.0881,1.0000 14.250,1.2946,0.02428,0.01861,0.0380,0.0857,1.0000 14.500,1.3057,0.02541,0.01976,0.0389,0.0836,1.0000 14.750,1.3182,0.02648,0.02086,0.0396,0.0817,1.0000 15.000,1.3279,0.02780,0.02220,0.0404,0.0796,1.0000 15.250,1.3347,0.02939,0.02380,0.0412,0.0774,1.0000 15.500,1.3454,0.03072,0.02518,0.0417,0.0758,1.0000 15.750,1.3546,0.03222,0.02671,0.0421,0.0740,1.0000 16.000,1.3609,0.03402,0.02854,0.0425,0.0722,1.0000 16.250,1.3639,0.03617,0.03071,0.0429,0.0704,1.0000 16.500,1.3719,0.03793,0.03253,0.0431,0.0691,1.0000 16.750,1.3781,0.03987,0.03452,0.0432,0.0677,1.0000 17.000,1.3814,0.04216,0.03685,0.0432,0.0662,1.0000 17.250,1.3813,0.04484,0.03957,0.0431,0.0648,1.0000 17.500,1.3813,0.04758,0.04236,0.0429,0.0636,1.0000 17.750,1.3843,0.05004,0.04489,0.0426,0.0624,1.0000 18.000,1.3848,0.05282,0.04773,0.0422,0.0612,1.0000 18.250,1.3824,0.05595,0.05091,0.0417,0.0601,1.0000 18.500,1.3766,0.05951,0.05452,0.0410,0.0590,1.0000 18.750,1.3688,0.06336,0.05844,0.0402,0.0579,1.0000 19.000,1.3675,0.06653,0.06168,0.0394,0.0571,1.0000 19.250,1.3631,0.07010,0.06533,0.0385,0.0561,1.0000