Xfoil polar. Reynolds number fixed. Mach number fixed Polar key,xf-s1221-il-100000 Airfoil,s1221-il Reynolds number,100000 Ncrit,9 Mach,0 Max Cl/Cd,45.2234 Max Cl/Cd alpha,3.75 Url,http://airfoiltools.com/polar/csv?polar=xf-s1221-il-100000 Alpha,Cl,Cd,Cdp,Cm,Top_Xtr,Bot_Xtr -6.750,-0.2569,0.09921,0.09475,-0.0210,1.0000,0.1121 -6.500,-0.2707,0.09805,0.09372,-0.0220,1.0000,0.1171 -6.250,-0.3068,0.09855,0.09443,-0.0236,1.0000,0.1185 -6.000,-0.2695,0.09254,0.08838,-0.0201,1.0000,0.1217 -5.750,-0.2613,0.09027,0.08618,-0.0183,1.0000,0.1254 -5.500,-0.2694,0.08883,0.08486,-0.0168,1.0000,0.1296 -5.250,-0.3016,0.08724,0.08351,-0.0238,1.0000,0.1342 -5.000,-0.2870,0.08445,0.08076,-0.0166,1.0000,0.1365 -4.750,-0.2812,0.08257,0.07895,-0.0138,1.0000,0.1401 -4.500,-0.2954,0.08109,0.07766,-0.0184,1.0000,0.1480 -4.250,-0.2653,0.07684,0.07344,-0.0208,0.9938,0.1530 -4.000,-0.1367,0.03886,0.03395,-0.0951,0.9883,0.0753 -3.750,-0.0503,0.03048,0.02436,-0.1114,0.9849,0.0634 -3.500,0.0205,0.02682,0.02003,-0.1208,0.9729,0.0640 -3.250,0.0852,0.02394,0.01670,-0.1278,0.9561,0.0645 -3.000,0.1412,0.02136,0.01397,-0.1325,0.9304,0.0658 -2.750,0.1962,0.01922,0.01197,-0.1367,0.8939,0.0702 -2.500,0.2822,0.01709,0.00972,-0.1469,0.8400,0.0886 -2.250,0.3788,0.01701,0.00995,-0.1596,0.7536,0.3635 -2.000,0.4088,0.01854,0.01128,-0.1582,0.7041,0.4081 -1.750,0.4374,0.01916,0.01161,-0.1574,0.6705,0.4316 -1.500,0.4676,0.01936,0.01150,-0.1576,0.6433,0.4466 -1.250,0.4958,0.01949,0.01139,-0.1572,0.6223,0.4569 -1.000,0.5269,0.01952,0.01112,-0.1578,0.6037,0.4665 -0.750,0.5573,0.01958,0.01093,-0.1582,0.5874,0.4756 -0.500,0.5880,0.01959,0.01075,-0.1587,0.5727,0.4833 -0.250,0.6183,0.01968,0.01068,-0.1592,0.5599,0.4915 0.000,0.6495,0.01978,0.01058,-0.1599,0.5490,0.4991 0.250,0.6793,0.01991,0.01056,-0.1602,0.5385,0.5068 0.500,0.7096,0.02005,0.01061,-0.1607,0.5285,0.5158 0.750,0.7396,0.02025,0.01065,-0.1610,0.5201,0.5252 1.000,0.7692,0.02043,0.01083,-0.1613,0.5119,0.5344 1.250,0.7998,0.02067,0.01095,-0.1618,0.5047,0.5466 1.500,0.8283,0.02093,0.01122,-0.1619,0.4979,0.5590 1.750,0.8570,0.02115,0.01148,-0.1620,0.4906,0.5735 2.000,0.8869,0.02146,0.01169,-0.1622,0.4850,0.5904 2.250,0.9150,0.02176,0.01214,-0.1623,0.4788,0.6105 2.500,0.9425,0.02204,0.01252,-0.1621,0.4732,0.6346 2.750,0.9698,0.02237,0.01286,-0.1618,0.4684,0.6663 3.000,0.9939,0.02271,0.01344,-0.1608,0.4631,0.7061 3.250,1.0160,0.02298,0.01394,-0.1594,0.4579,0.7650 3.500,1.0276,0.02296,0.01415,-0.1554,0.4542,0.8615 3.750,1.0528,0.02328,0.01433,-0.1549,0.4506,1.0000 4.000,1.0823,0.02402,0.01514,-0.1557,0.4453,1.0000 4.250,1.1113,0.02469,0.01581,-0.1561,0.4401,1.0000 4.500,1.1408,0.02534,0.01636,-0.1565,0.4359,1.0000 4.750,1.1693,0.02618,0.01715,-0.1567,0.4324,1.0000 5.000,1.1943,0.02709,0.01825,-0.1566,0.4275,1.0000 5.250,1.2210,0.02786,0.01907,-0.1565,0.4228,1.0000 5.500,1.2491,0.02854,0.01970,-0.1566,0.4188,1.0000 5.750,1.2759,0.02951,0.02067,-0.1566,0.4153,1.0000 6.000,1.2979,0.03066,0.02210,-0.1560,0.4101,1.0000 6.250,1.3234,0.03150,0.02301,-0.1558,0.4054,1.0000 6.500,1.3512,0.03217,0.02364,-0.1557,0.4015,1.0000 6.750,1.3744,0.03337,0.02498,-0.1553,0.3972,1.0000 7.000,1.3944,0.03470,0.02655,-0.1545,0.3915,1.0000 7.250,1.4205,0.03542,0.02730,-0.1542,0.3870,1.0000 7.500,1.4498,0.03597,0.02777,-0.1543,0.3832,1.0000 7.750,1.4632,0.03790,0.03010,-0.1529,0.3768,1.0000 8.000,1.4866,0.03875,0.03104,-0.1523,0.3714,1.0000 8.250,1.5175,0.03890,0.03110,-0.1524,0.3672,1.0000 8.500,1.5288,0.04105,0.03362,-0.1508,0.3607,1.0000 8.750,1.5512,0.04184,0.03453,-0.1500,0.3548,1.0000 9.000,1.5843,0.04167,0.03422,-0.1502,0.3506,1.0000 9.250,1.5899,0.04421,0.03721,-0.1481,0.3431,1.0000 9.500,1.6165,0.04439,0.03743,-0.1476,0.3374,1.0000 9.750,1.6484,0.04416,0.03710,-0.1476,0.3324,1.0000 10.000,1.6519,0.04647,0.03985,-0.1451,0.3241,1.0000 10.250,1.6920,0.04494,0.03813,-0.1456,0.3186,1.0000 10.500,1.6950,0.04720,0.04077,-0.1430,0.3103,1.0000 10.750,1.7324,0.04561,0.03906,-0.1431,0.3036,1.0000 11.000,1.7422,0.04693,0.04065,-0.1410,0.2955,1.0000 11.250,1.7766,0.04540,0.03902,-0.1408,0.2879,1.0000 11.500,1.7867,0.04634,0.04020,-0.1385,0.2794,1.0000 11.750,1.8240,0.04433,0.03801,-0.1386,0.2712,1.0000 12.000,1.8256,0.04574,0.03978,-0.1354,0.2619,1.0000 12.250,1.8556,0.04436,0.03827,-0.1347,0.2532,1.0000 12.500,1.8608,0.04501,0.03917,-0.1317,0.2435,1.0000 12.750,1.8670,0.04559,0.03992,-0.1287,0.2341,1.0000 13.000,1.8827,0.04516,0.03942,-0.1266,0.2243,1.0000 13.250,1.8711,0.04679,0.04129,-0.1218,0.2156,1.0000 13.500,1.8655,0.04819,0.04277,-0.1180,0.2070,1.0000 13.750,1.8673,0.04910,0.04357,-0.1152,0.1972,1.0000 14.000,1.8443,0.05283,0.04760,-0.1119,0.1896,1.0000 14.250,1.8361,0.05554,0.05029,-0.1101,0.1810,1.0000 14.500,1.8182,0.05981,0.05469,-0.1092,0.1734,1.0000 14.750,1.8031,0.06437,0.05931,-0.1090,0.1661,1.0000 15.000,1.7902,0.06896,0.06391,-0.1095,0.1586,1.0000 15.250,1.7713,0.07492,0.06999,-0.1107,0.1522,1.0000 15.500,1.7652,0.07902,0.07403,-0.1113,0.1446,1.0000 15.750,1.7443,0.08585,0.08103,-0.1134,0.1393,1.0000 16.000,1.7329,0.09126,0.08651,-0.1150,0.1334,1.0000 16.250,1.7288,0.09555,0.09080,-0.1157,0.1276,1.0000 16.500,1.7044,0.10366,0.09916,-0.1193,0.1240,1.0000 16.750,1.4164,0.17504,0.17121,-0.1646,0.1307,1.0000