Impeller

==Description==
*Stabilizes the flight of the main rotors and increases yaw rate of armoured aircraft. 
*For acivation, requires at least one main or coaxial rotor to be mounted.
==Receiving==
* Part of the following packs:
** Dragonfly
** Dragonfly (Deluxe)
** Dragonfly (Lite)
* Buy at the market.
== Upgrade ==
==Trivia==
* Part's name is a reference to Mi-28 which is decribed in aviation as "screw in a ring". In the case of helicopters, this is a closed tail rotor installed in a special profiled channel built into the tail fin of the helicopter; by Eurocopter this design is registered as “fenestron”.
* It is vaguely similar to a fragment of the steering beam, together with the tail rotor, of the Russian Ka-60 helicopter, judging by a little rough semi-ring shape and the blades. There are no characteristic signs of similarity with K-60 (number of blades, shape of beam elements). 
** On the K-60, the tail rotor is of the “fenestron” type, similar in appearance to helicopters Eurocopter with fenestron.
==Gallery==
Ка-60_hekicopter.jpg|KA-60
Ка-60_hekicopter_tail_rotor.jpg|Close view of KA-60 tail rotor