The goal of the book is to guide through the designing, manufacturing and testing of an electrically powered Radio Controlled (RC) aircraft. The design of aircraft is optimized for internal payload system. A systematic process from conceptual design to fabrication and testing is thoroughly followed and explained. Aircraft configuration selection process is done by following a qualitative arguments approach including mission performance, payload storage, stability & control and fabrication. The designing and optimization has been carried out using AutoCAD, ANSYS and CFX software. The four implementation stages are followed to bring the design from concept to reality.