I have to write 150 to 250 words on the behavior of air when the angle of attack of a wing increases. I have 2 graphs, one is on the Cl and the other on the Cd This is for the drag coefficient: http://www.plaatjesdump.nl/upload/89b3970a883a30f9fb840a6982d2859c.jpg This is the graph of the lift coefficient: http://www.plaatjesdump.nl/upload/71ab849935f91c7361c56ac0b7a9d0e3.jpg I can see that the lift coefficient decreases rapidly after the 10° mark and the drag increases more rapid. But honestly, I have no clue on how to write the 150 to 250 words on this or why the air behaves like that. I have no idea where to start. If someone could help me get into the right direction, I would appreciate it very much.