|MLA Citation:||Bloomfield, Louis A. "Question 1066"|
How Everything Works 16 Jul 2018. 16 Jul 2018 <http://howeverythingworks.org/print1.php?QNum=1066>.
The details of the airplane wing's surfaces have relatively subtle affects on the wing's performance. While most wings are asymmetric, with broadly curved top surfaces and relatively flat bottom surfaces, that isn't essential. It's quite possible to use wings that are symmetric, with the same curvature on their tops as on their bottoms. But a symmetric wing won't obtain an upward lift force unless it's tilted upward, while an asymmetric wing can obtain lift even when it's horizontal. A broader, more highly curved wing can also obtain more lift at a lower speed, as required for slow moving propeller planes. So wing shapes are often dictated by the desired flight angle and speed of a particular airplane and its wings.