Question

what is work of back fan present in helecopter​

Answer 1

Answer:

rotor blades...... your answer is rotor blades

Answer 2

Answer:Overview. The helicopter rotor is powered by the engine, through the transmission, to the rotating mast. The mast is a cylindrical metal shaft that extends upward from—and is driven by—the transmission. At the top of the mast is the attachment point for the rotor blades called the hub.