The idea of tiltrotor has been proposed and pushed forward since people's first work in the direction originated in 1902. Successful works such as Bell Boeing V-22 Osprey are still on active military duty in the US and showing its remarkable efficiency in transportation and cargo handling, which is also served as one of the reference prototypes in this drone project. Tiltrotor aircraft shares desirable merits from fix wing and rotor aircraft, enabling it to take off and land vertically, hover at low speed in the air, while achieving a faster cruise speed than a rotor one. To be specific, the technique of vertical launching and landing allows a low request to the size of landing place, which is helpful when the design is utilized in extreme conditions (lack of landing space); The technique of tilted propeller provides extra propulsion to the aircraft, enabling it to keep a relatively high cruise speed. The capacities of hovering and other functions shared by rotor aircraft are also useful depending on purpose. This project aims to design a tiltrotor drone which shares all the merits of tiltrotor aircraft above and keeps the advantage of drones such as remote control, small size, and flexibility. The design achieves those merits by adding 2 remotely controlled rotating propellers. In other words, when the launch altitude meets the expectation, rotors, or the propellers are controlled to rotate 90 degrees reaching horizontal to provide forward propulsion. When used in application, this design is capable of handling similar tasks that can be done by normal rotor drone with a higher efficiency because of its high cruising speed. For example, when using it in aerial photography, people will spend less time waiting for drone traveling to the desired viewpoint.

Feifan Li, Yunhao Lan. A drone with a combination of dual rotors and fixed wings. Academic Journal of Engineering and Technology Science (2021) Vol. 4, Issue 5: 55-58. https://doi.org/10.25236/AJETS.2021.040510.

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