www.tjprc.org SCOPUS Indexed Journal editor@tjprc.org DESIGN AND FABRICATION OF A MEDIUM SIZE UAV WITH SMART LOCK- SYSTEM FOR WINGS KRISHN DAS PATEL 1 , S. SMRUTHI 2 , MAUSAM MALLA 3 , M. UDAYA KUMAR 4 & SUNNY IZATE 5 1 M. Tech in Aeronautical Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and TechnologyAvadi, Chennai, Tamil Nadu, India 2 Students, Department of Aeronautical Engineering, Vel Tech Rangarajan Dr. Sagunthala R & D Institute of Science and Technology, Avadi, Chennai, Tamil Nadu, India ABSTRACT This paper summarizes the entry of undergraduate students’ team for a competition. The team was formed to design, build, test, and fly an Unmanned Aerial Vehicle while keeping in mind to ease the manufacturing and assembly processes capable of lifting heavy loads.The configuration of the aircraft was chosen based on low power to weight ratio and design constraints. To ensure the required aerodynamic forces are met and to distribute the landing impact loads better through the airframe, the CATIA V5, Airfoil section, and structural integrity of landing gear was analyzed using ANSYS 16.2 software. To reduce the unnecessary weight, the structure of the wing and fuselage section was examined. A smart locking system was designed and integrated with the structure to ease the assembly process and to ensure safe attachment of the wing to the fuselage. KEYWORDS: Smart Locking System, Heavy Loads, Airfoil & Landing Gear Received: Jun 08, 2020; Accepted: Jun 28, 2020; Published: Sep 03, 2020; Paper Id.: IJMPERDJUN20201045 1. INTRODUCTION An Unmanned Ariel Vehicle (UAV), commonly known as a drone is an aircraft without a human pilot aboard. These aircraft are broadly classified into three categories, namely: Fixed-wing, Rotary wing, and flapping wing UAVs. They are also classified based on size, range, and endurance.Under the fixed-wing category, we have Micro, Mini, Medium, and Large UAVs; Close-range UAVs, Short-range UAVs, Mid-range UAVs and Endurance UAVs; MALE and HALE [1]. UAVs have wide-ranged applications in the industrial, public, and military sectors. Mapping and surveying, inspection and monitoring, aerial imaging, precision agriculture are some of the most important applications. Traditionally wings are attached to the fuselage in the following three ways: • Spliced Shear Plates • Tension Bolts • Lug Fittings Though these methods have proved to be sturdy and efficient, we have devised a smart lock system capable of not only safely securing the wing to the fuselage but also enabling speedy assembly and dismantling along with easing the manufacturing process. Original Article International Journal of Mechanical and Production Engineering Research and Development (IJMPERD) ISSN(P): 2249–6890; ISSN(E): 2249–8001 Vol. 10, Issue 3, Jun 2020, 10913–10924 © TJPRC Pvt. Ltd.