We are now going to move from looking at the wing in planform and concentrate on the section profile of the airfoil that is used on the wing. We also discussed the aspect ratio and how a longer, thinner wing will reduce the total drag of the wing up to a particular speed whereafter transonic speed effects begin to dominate the total drag produced which necessitating a sweeping of the wing to combat the transonic drag rise. In this post we look more closely at the shape of the wing airfoil: why this differs from aircraft to aircraft, and how a careful airfoil selection will help to produce the flying characteristics you desire for your airplane.Īfter reading the post on wing area and aspect ratio, you should appreciate that there exists a very clear relationship between the size (weight) of the aircraft and the size of the wing (wing area) required to operate the aircraft as intended. Specifically we looked at wing area and aspect ratio. In a previous post we looked at the importance of the shape and plan-form of the wing, and how this has a great impact on the flying characteristics of the aircraft. This is part 5 in a series of fundamental aircraft design articles that aims to give you an introduction to aircraft design principles.
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