After talking about the trapezoidal type wing, it's time to see a little more about a combination of this with the rectangular wing, but... I'll need to talk a little about the rectangular one, it hasn't explained the reasons why it is used a lot too, mainly in slightly older aircraft it is common to find this type of model. For those who still haven't followed our old post, it's in this link.
Let's say that just as the trapezoid is very efficient aerodynamically the rectangular is the opposite, in fact they are just the opposite of the other, the rectangular is not so aerodynamically efficient but structurally it is a good wing, its design is simple and does not involve so many difficulties of construction since the stringers and ribs are the same size.
The mixed wing arrives in this story precisely to balance these effects, the intention is to create a wing with less drag than a completely rectangular one but not so bad structurally, it is usually composed of an arrangement in which the root starts rectangular and near the tip becomes trapezoidal, as in the pictures below.
In addition to combining both characteristics, it is also possible to use several combinations in the same wing, just like the Piper PA 28. In this case we have a configuration that starts out trapezoidal, becomes straight and then becomes trapezoidal again, just imagine how complicated the design must be aerodynamic and the design of the internal parts of such a wing, on the other hand it is very efficient in flight.
So, we have demonstrated here that it is indeed possible to mix aircraft wing shapes, most of the time this is sought in the name of aerodynamic efficiency in any range of flight.
In the next part, we'll discuss the arrow-shaped wing, but first I'll give a light explanation about the wing's CG and how it influences the project in general, let's say that this is a little important.
