mcat wrote:itu MD 520N sistemnya gimana ya? ga pake rotor belakang, padahal juga ga double main rotor.
kalo gak salah sih... kalo gak salah lho.... tailnya bergerak pake "hembusan" angin turbine di lubang belakang itu....
kalo gak salah lho.....



How the "NOTAR"* system works
*no tail rotor
The control around the Y-axis in a normal helicopter is achieved by a small vertical rotor on the tail. This provides the thrust for compensating the torque of the motor and for (left/right) steering.
For the models MD 520 N and MD 900 Explorer the necessary thrust is generated by a radial fan mounted directly on the engine, the resulting air flow is then guided through a "duct system" to where it is needed; the end of the tail boom.
On the end of the boom is a rotating end cap which directs the airflow and controls the heli in the Y- axis.
The engine cooling is integrated into this system. The radial fan intakes the air mainly from beneath but some is taken from above - over the engine. If the end cap ("tail" of the helicopter) is closed totally, the airflow reverses and engine cooling is guaranteed even in this situation




