* LK8000 polar for: IS-28B2 Lark with 2 person
* Based on HA-5017 operation manual
* MassDryGross[kg], MaxWaterBallast[liters], Speed1[km/h], Sink1[m/s], Speed2, Sink2, Speed3, Sink3, WingArea[m2]
 590,0,85,-0.67,100,-0.817,180,-3.1,18.24
