Vertical stabilizers give the pilots yaw control - the ability to turn the airplane left and right. However, there are aircraft designed to operate without them. An example is the B-2 Stealth ...

While having a second engine provides a safety net, a manageable emergency can turn into a catastrophe. Here is how to handle ...

or yaw left and right. By the third glider they built, they had solved most of these problems of steering and stability. To make a self-powered airplane, they needed to develop a very light ...