Role of winglets in boeing - 737 aircraft

The winglets in an aircraft wing plays an important role in improving aircraft efficiency in terms of aerodynamic and fuel. With the help of winglets, the resulting drag of an aircraft can be reduced. This article describes whether the winglets is able to reduce drag or not - mathematically. Moreover, this article compares the situation of an aircraft with and without winglet. This article describes about the aspect ratio of an aircraft. Aspect Ratio may be defined as the ratio of the square of wing span by the wing area. Therefore, a long narrow wing will have high aspect ratio because the span length of the wing increases and the wing area decreases whereas a short wide wing has low aspect ratio because the wing span length effectively decreases and the wing area effectively increases. This article also focuses on the fact as the evolution of aircraft occurred the wing of the Boeing aircraft became long narrowor short wide.