And we start this series by explaining the aerodynamics and operation of each type of wing, yes, there are thousands of types available, the use in design and molding depends much more on the aerodynamics department of a company than on the base concept itself, but they they always try to make this area as efficient as possible, that is, to do their best without consuming so much space, generating as little aerodynamic drag as possible and reducing the total weight of the set. The recommended speed for its use is around 200km/h to 550km/h where its efficiency is more evident, but nothing prevents its use in other types of projects where the aircraft is faster in cruise or has a lower speed (especially in case of model airplanes).
Today's subject is trapezoidal wing, you don't need to say much to understand how it is, the format is trapeze if you are going to analyze the set. It is known for being very efficient in low-speed flights because its chord profile (to know what a chord is on a wing – image below) is larger at the root and smaller at the wing tips, which reduces the vortex created because the tip is smaller than the root, unlike a wing with a rectangular profile.
Okay, all this aerodynamically efficiency is explained in its non-effectiveness in structural . Due to its smaller area on the tips, logically the number of stringers and the size of the ribs is smaller, but in the structural tests in which the wing has to a weight 150% greater than that of the aircraft itself, the tip has to the same weight as the root , theoretically. But this is achieved using more efficient metal alloys that do not add as much weight to the aircraft.
To calculate its area is basically the same as the trapeze, just take the smallest and largest cord and its “height” and divide by 2, the hardest thing is the size of each rib that changes, that is, all on each side of the wing are different.
Next part I'll talk about mixed wing, and in the other wing profiles, the symmetrical and asymmetrical ones and the differences in the angle of attack in the center of mass and in the efficiency of the set.
