This book provides a comprehensive overview of UAVs, encompassing both fixed-wing and copter-type configurations. It offers a detailed analysis of the potential applications of UAVs, complemented by a comparative study of their distinct characteristics. Additionally, this book delves into the intricate design process of drones and elucidates the impact of configuration on their functionality. This book presents analytical dependencies that can be readily applied in practice to UAV design. Numerous examples are provided, accompanied by numerical solutions and graphical explanations, which facilitate comprehension. The current state of Airworthiness regulations for UAVs is still in the preliminary stage of development. In this book, an analysis was conducted for drone safety and existing Airworthiness rules in various countries. This book is a good reference for industrial drone designers, and drone researchers from research institutions and universities.