9. Conclusion

In this chapter, an analysis for defining the helicopter's performance was performed. It has been shown that the performance characteristics can be derived by using simple models as the momentum and blade elements theories. The impact of weight and altitude on the required power and the available power has been presented. The effect of near the ground operation on the helicopter's performance is discussed. Also, the case when the engine stops in flight and the main rotor performs autorotation is presented. Some elementary analysis of the stability characteristics has been done. The impact of different helicopter parts on the stability has been considered. Finally, it has been shown how the helicopter can be controlled.
