Sizing and Performance Analysis of a Single-Seat Tandem Helicopter

This chapter provides an overview of the initial sizing procedure of a single-seat tandem helicopter whose intended useful payload is 100 kg together with the basic analyses of power performances in hover and progressive flight. In the beginning, following the definition of the initial requirements, the essential advantages of tandem configuration are mentioned and some similar air vehicles are briefly described. This is followed by the total mass decomposition (into empty, useful and fuel mass) and estimation of its individual components as well as the definition of the main geometric features of the two rotors. By assuming a piston engine of 80 kW continuous power, it is possible to estimate the required and available power in hover and progressive flight as well as make an estimation of optimal velocities and possible range and endurance. Obtained results are presented graphically and numerically. In the end, some conclusions and recommendations for further research are given.