Lift and Drag are very important parameters for flying vehicles but there is an important phenomenon in three-dimensional flow over a wing which it is the existence of wingtip vortex. It has significant effects on the aerodynamics of flying vehicles. Computational study was conducted to investigate the change in lift and drag by using a conic shape. This design builds upon the concept that the conic shape at wing tip would be function as a winglet to reduce the strength of wing tip vortex. Reduction of wing tip vortex causes a reduction in drag force and an increase in lift. Here, we consider a rectangular half wing with NACA0012 airfoil shape at low Reynolds number below 50,000
