The fuselage is the central component of an aircraft, which connects the wing, tail and landing gear as a whole. In terms of aerodynamics, it is required that its windward area should be reduced as small as possible, the surface should be smooth, and the shape should be streamlined without protruding angles and gaps, so as to reduce the resistance as much as possible. Under the condition of ensuring sufficient strength, stiffness and fatigue resistance, its weight shall be as light as possible.
