Abstract
Recently, many types of helicopter have been developed and operated. However, most of them have variable pitch mechanism, and Fixed-pitch helicopter is minority. Therefore, the behavior of Fixed-pitch helicopter have not been studied well, compared with that of variable-pitch helicopter. In this paper, we construct a mathematical model of Fixed-pitch co-axial rotor unmanned helicopter. Then, we verify the mathematical model by the computer simulation. Finally, we analyze the behavior of unmanned helicopter by the computer simulation with the mathematical model.
