No abstract

Morphing wing concept is introduced to analyses wings aerodynamic performance the through warping mechanism. Thread rod mechanism is installed at the trailing edge of the wing to warp. Relative displacement between upper and lower skin of wing leads to have twisted wing. This new concept is applied at the demonstration wing which was built based on NACA 23012 airfoil section with a span of 0.580m and a chord length of 0.235m. Demonstrated model was tested using wind tunnel and analysis software. In general, it was demonstrated at lower AOA and the tests showed that warping could change the lift force in optimized manner. This study proved that a morphing wing can have optimum L/D ratio to minimize the fuel consumption of an aircraft and to ensure that the lift-to-drag ratio remains constant at various flight conditions.

No abstract

As the technology is looping and far applications of UAV is improving so there is need to develop an UAV with optimum propulsive efficiency and also producing high thrust. So our mission is to build an UAV with twin propellers propelled by single motor. A fixed wing UAV which has a unique type of propulsion system. In this fixed wing UAV, two propellers are driven by single motor to enhance the propulsive efficiency. The bevel gear mechanism is the most important. This is the propulsion system for the aircraft model which runs the two propellers with a single motor. Bevel gears are used to transfer the power from the motor to the propeller. The bevel gear train is 80cm long through which a long shaft is passed that holds the bevel gears. Totally six bevel gears are housed inside the box which connects the motor shaft to the propeller shaft. The bevel gears are arranged in such a way that the when motor shaft rotates the propeller connected rotates both in opposite direction.