Xfoil polar. Reynolds number fixed. Mach number fixed Polar key,xf-naca2421-il-200000-n5 Airfoil,naca2421-il Reynolds number,200000 Ncrit,5 Mach,0 Max Cl/Cd,53.3172 Max Cl/Cd alpha,7.25 Url,http://www.airfoiltools.com/polar/csv?polar=xf-naca2421-il-200000-n5 Alpha,Cl,Cd,Cdp,Cm,Top_Xtr,Bot_Xtr -19.250,-0.9337,0.10200,0.09591,-0.0615,1.0000,0.0683 -19.000,-0.9466,0.09656,0.09034,-0.0643,1.0000,0.0693 -18.750,-0.9603,0.09107,0.08469,-0.0670,1.0000,0.0704 -18.500,-0.9683,0.08660,0.08012,-0.0691,1.0000,0.0714 -18.250,-0.9680,0.08350,0.07701,-0.0703,1.0000,0.0722 -18.000,-0.9707,0.07994,0.07341,-0.0719,1.0000,0.0732 -17.750,-0.9747,0.07622,0.06961,-0.0735,1.0000,0.0742 -17.500,-0.9790,0.07252,0.06583,-0.0750,1.0000,0.0753 -17.250,-0.9832,0.06890,0.06209,-0.0764,1.0000,0.0764 -17.000,-0.9869,0.06540,0.05845,-0.0777,1.0000,0.0776 -16.750,-0.9872,0.06254,0.05559,-0.0785,1.0000,0.0785 -16.500,-0.9882,0.05963,0.05265,-0.0793,1.0000,0.0796 -16.250,-0.9895,0.05674,0.04970,-0.0801,1.0000,0.0807 -16.000,-0.9903,0.05399,0.04687,-0.0807,1.0000,0.0820 -15.750,-0.9905,0.05140,0.04419,-0.0811,1.0000,0.0834 -15.500,-0.9900,0.04897,0.04165,-0.0813,1.0000,0.0847 -15.250,-0.9902,0.04666,0.03935,-0.0812,1.0000,0.0859 -15.000,-0.9904,0.04447,0.03713,-0.0810,1.0000,0.0871 -14.750,-0.9901,0.04244,0.03505,-0.0805,1.0000,0.0885 -14.500,-0.9895,0.04058,0.03314,-0.0797,1.0000,0.0900 -14.250,-0.9887,0.03891,0.03139,-0.0786,1.0000,0.0916 -14.000,-0.9893,0.03733,0.02976,-0.0771,1.0000,0.0930 -13.750,-0.9920,0.03579,0.02823,-0.0752,1.0000,0.0943 -13.500,-0.9950,0.03445,0.02686,-0.0729,1.0000,0.0957 -13.250,-0.9985,0.03329,0.02566,-0.0701,1.0000,0.0973 -13.000,-1.0028,0.03227,0.02459,-0.0669,1.0000,0.0989 -12.750,-1.0078,0.03139,0.02364,-0.0633,1.0000,0.1005 -12.500,-1.0075,0.03035,0.02261,-0.0608,0.9988,0.1021 -12.250,-0.9863,0.02922,0.02145,-0.0620,0.9948,0.1048 -12.000,-0.9618,0.02828,0.02044,-0.0633,0.9916,0.1080 -11.750,-0.9410,0.02734,0.01947,-0.0637,0.9863,0.1109 -11.500,-0.9181,0.02646,0.01858,-0.0645,0.9817,0.1141 -11.250,-0.8903,0.02572,0.01777,-0.0658,0.9784,0.1180 -11.000,-0.8710,0.02498,0.01702,-0.0655,0.9716,0.1212 -10.750,-0.8454,0.02427,0.01630,-0.0662,0.9669,0.1251 -10.500,-0.8138,0.02365,0.01560,-0.0678,0.9638,0.1297 -10.250,-0.7968,0.02301,0.01499,-0.0666,0.9553,0.1332 -10.000,-0.7692,0.02241,0.01436,-0.0673,0.9500,0.1379 -9.750,-0.7445,0.02186,0.01377,-0.0672,0.9437,0.1422 -9.500,-0.7232,0.02131,0.01323,-0.0665,0.9356,0.1466 -9.250,-0.6933,0.02079,0.01266,-0.0673,0.9309,0.1519 -9.000,-0.6749,0.02033,0.01221,-0.0659,0.9218,0.1561 -8.750,-0.6499,0.01985,0.01172,-0.0657,0.9152,0.1614 -8.500,-0.6228,0.01941,0.01124,-0.0657,0.9093,0.1668 -8.250,-0.6039,0.01900,0.01087,-0.0643,0.8997,0.1719 -8.000,-0.5763,0.01858,0.01041,-0.0644,0.8936,0.1782 -7.750,-0.5554,0.01822,0.01007,-0.0632,0.8845,0.1838 -7.500,-0.5309,0.01785,0.00970,-0.0627,0.8765,0.1907 -7.250,-0.5052,0.01749,0.00933,-0.0623,0.8691,0.1977 -7.000,-0.4830,0.01720,0.00905,-0.0613,0.8592,0.2052 -6.750,-0.4560,0.01686,0.00870,-0.0611,0.8520,0.2132 -6.500,-0.4335,0.01662,0.00846,-0.0601,0.8418,0.2216 -6.250,-0.4076,0.01633,0.00816,-0.0597,0.8330,0.2302 -6.000,-0.3831,0.01611,0.00793,-0.0590,0.8236,0.2395 -5.750,-0.3581,0.01586,0.00768,-0.0584,0.8140,0.2483 -5.500,-0.3322,0.01566,0.00745,-0.0580,0.8046,0.2582 -5.250,-0.3078,0.01544,0.00724,-0.0573,0.7941,0.2673 -5.000,-0.2814,0.01527,0.00702,-0.0569,0.7847,0.2774 -4.750,-0.2570,0.01507,0.00684,-0.0561,0.7738,0.2863 -4.500,-0.2306,0.01492,0.00663,-0.0557,0.7640,0.2962 -4.250,-0.2059,0.01475,0.00647,-0.0550,0.7527,0.3048 -4.000,-0.1798,0.01460,0.00628,-0.0545,0.7426,0.3144 -3.750,-0.1548,0.01446,0.00614,-0.0539,0.7309,0.3235 -3.500,-0.1292,0.01433,0.00598,-0.0533,0.7203,0.3336 -3.250,-0.1040,0.01422,0.00586,-0.0527,0.7086,0.3432 -3.000,-0.0786,0.01410,0.00573,-0.0521,0.6978,0.3542 -2.750,-0.0535,0.01400,0.00562,-0.0515,0.6863,0.3653 -2.500,-0.0281,0.01390,0.00552,-0.0509,0.6760,0.3777 -2.250,-0.0032,0.01380,0.00544,-0.0502,0.6650,0.3903 -2.000,0.0223,0.01374,0.00536,-0.0496,0.6552,0.4046 -1.750,0.0470,0.01365,0.00531,-0.0489,0.6444,0.4200 -1.500,0.0721,0.01358,0.00526,-0.0482,0.6347,0.4363 -1.250,0.0969,0.01351,0.00524,-0.0475,0.6245,0.4538 -0.750,0.1465,0.01341,0.00524,-0.0461,0.6064,0.4973 -0.500,0.1712,0.01338,0.00524,-0.0454,0.5972,0.5199 -0.250,0.1963,0.01336,0.00527,-0.0447,0.5882,0.5396 0.000,0.2215,0.01337,0.00528,-0.0440,0.5787,0.5581 0.250,0.2467,0.01338,0.00532,-0.0434,0.5705,0.5762 0.500,0.2720,0.01338,0.00538,-0.0427,0.5620,0.5933 0.750,0.2975,0.01342,0.00541,-0.0421,0.5542,0.6096 1.000,0.3230,0.01346,0.00549,-0.0415,0.5464,0.6269 1.250,0.3479,0.01349,0.00557,-0.0408,0.5378,0.6442 1.500,0.3729,0.01355,0.00563,-0.0401,0.5295,0.6614 1.750,0.3976,0.01360,0.00573,-0.0393,0.5200,0.6787 2.000,0.4220,0.01369,0.00581,-0.0385,0.5107,0.6959 2.250,0.4461,0.01374,0.00594,-0.0376,0.5005,0.7136 2.500,0.4700,0.01384,0.00605,-0.0366,0.4910,0.7321 2.750,0.4945,0.01393,0.00619,-0.0358,0.4829,0.7511 3.000,0.5187,0.01403,0.00634,-0.0349,0.4746,0.7703 3.250,0.5427,0.01417,0.00649,-0.0340,0.4671,0.7898 3.500,0.5670,0.01429,0.00669,-0.0331,0.4587,0.8093 3.750,0.5909,0.01445,0.00687,-0.0321,0.4509,0.8288 4.000,0.6153,0.01463,0.00709,-0.0312,0.4435,0.8487 4.250,0.6397,0.01482,0.00732,-0.0303,0.4350,0.8695 4.500,0.6644,0.01507,0.00755,-0.0295,0.4274,0.8896 4.750,0.6907,0.01529,0.00781,-0.0290,0.4191,0.9076 5.000,0.7168,0.01555,0.00805,-0.0286,0.4109,0.9228 5.250,0.7475,0.01583,0.00832,-0.0292,0.4025,0.9342 5.500,0.7753,0.01611,0.00858,-0.0293,0.3935,0.9465 5.750,0.8061,0.01642,0.00886,-0.0301,0.3851,0.9567 6.000,0.8374,0.01674,0.00916,-0.0310,0.3754,0.9657 6.250,0.8680,0.01710,0.00947,-0.0319,0.3663,0.9750 6.500,0.9020,0.01746,0.00981,-0.0336,0.3558,0.9815 6.750,0.9343,0.01784,0.01016,-0.0350,0.3462,0.9889 7.000,0.9663,0.01822,0.01051,-0.0364,0.3359,0.9951 7.250,0.9901,0.01857,0.01084,-0.0362,0.3274,1.0000 7.500,0.9892,0.01874,0.01100,-0.0311,0.3206,1.0000 7.750,0.9898,0.01901,0.01121,-0.0264,0.3139,1.0000 8.000,0.9970,0.01928,0.01149,-0.0229,0.3067,1.0000 8.250,1.0044,0.01965,0.01183,-0.0196,0.2990,1.0000 8.500,1.0143,0.02007,0.01223,-0.0168,0.2915,1.0000 8.750,1.0259,0.02053,0.01269,-0.0145,0.2831,1.0000 9.000,1.0369,0.02109,0.01320,-0.0122,0.2755,1.0000 9.250,1.0499,0.02163,0.01375,-0.0103,0.2669,1.0000 9.500,1.0607,0.02231,0.01440,-0.0082,0.2593,1.0000 9.750,1.0739,0.02297,0.01505,-0.0065,0.2511,1.0000 10.000,1.0838,0.02380,0.01584,-0.0046,0.2438,1.0000 10.250,1.0965,0.02456,0.01661,-0.0031,0.2362,1.0000 10.500,1.1054,0.02555,0.01755,-0.0013,0.2292,1.0000 10.750,1.1176,0.02643,0.01845,0.0001,0.2223,1.0000 11.000,1.1269,0.02751,0.01950,0.0016,0.2157,1.0000 11.250,1.1375,0.02857,0.02057,0.0029,0.2099,1.0000 11.500,1.1481,0.02967,0.02169,0.0041,0.2039,1.0000 11.750,1.1555,0.03099,0.02299,0.0055,0.1986,1.0000 12.000,1.1672,0.03210,0.02415,0.0064,0.1932,1.0000 12.250,1.1760,0.03344,0.02551,0.0074,0.1877,1.0000 12.500,1.1829,0.03494,0.02701,0.0085,0.1830,1.0000 12.750,1.1933,0.03626,0.02839,0.0092,0.1776,1.0000 13.000,1.1999,0.03789,0.03004,0.0100,0.1725,1.0000 13.250,1.2070,0.03954,0.03172,0.0108,0.1679,1.0000 13.500,1.2147,0.04121,0.03344,0.0113,0.1627,1.0000 13.750,1.2187,0.04322,0.03546,0.0119,0.1582,1.0000 14.000,1.2257,0.04504,0.03733,0.0124,0.1535,1.0000 14.250,1.2303,0.04712,0.03945,0.0127,0.1488,1.0000 14.500,1.2326,0.04946,0.04181,0.0130,0.1448,1.0000 14.750,1.2381,0.05157,0.04398,0.0132,0.1403,1.0000 15.000,1.2400,0.05405,0.04650,0.0133,0.1362,1.0000 15.250,1.2418,0.05661,0.04909,0.0133,0.1325,1.0000 15.500,1.2446,0.05912,0.05167,0.0133,0.1284,1.0000 15.750,1.2443,0.06200,0.05457,0.0131,0.1249,1.0000 16.000,1.2452,0.06479,0.05742,0.0129,0.1215,1.0000 16.250,1.2461,0.06763,0.06033,0.0126,0.1179,1.0000 16.500,1.2443,0.07082,0.06354,0.0122,0.1148,1.0000 16.750,1.2437,0.07391,0.06668,0.0117,0.1118,1.0000 17.000,1.2436,0.07699,0.06984,0.0112,0.1086,1.0000 17.250,1.2409,0.08041,0.07330,0.0105,0.1057,1.0000 17.500,1.2384,0.08383,0.07676,0.0098,0.1032,1.0000 17.750,1.2380,0.08705,0.08007,0.0090,0.1003,1.0000 18.000,1.2349,0.09065,0.08373,0.0081,0.0976,1.0000 18.250,1.2307,0.09438,0.08747,0.0071,0.0954,1.0000 18.500,1.2299,0.09775,0.09094,0.0061,0.0928,1.0000 18.750,1.2269,0.10144,0.09470,0.0049,0.0903,1.0000 19.000,1.2235,0.10517,0.09846,0.0037,0.0882,1.0000