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Questions tagged [tail-rotor]

The tail rotor is a smaller rotor mounted at the end of a helicopter's tail.

7
votes
1answer
409 views

What factors govern the placement of a helicopter's tail rotor (left or right)?

An image search for 'helicopter' indicates that there isn't a consensus on whether to place the tail rotor to the left or the right of the tail boom, although I'm believe there may be a bias for left. ...
1
vote
0answers
506 views

Can a helicopter fly without a tail rotor? [duplicate]

Just wondering if a helicopter can fly without a tail rotor?
2
votes
1answer
939 views

Why do No Tail Rotor (NOTAR) helicopters use an enclosed variable pitch fan?

Aerotécnica AC-14 was an early no tail rotor prototype which used the ducted exhaust from the turboshaft to counter the torque of the main rotor. The concept seems simple with few moving parts. It ...
15
votes
3answers
2k views

What are the benefits of a non-orthogonal (scissor) tail-rotor?

Why is the tail-rotor of some helicopters (e.g., Boeing AH-64 Apache) is made of non-orthogonal (scissor) blades? What are the aerodynamic benefits (or any other benefits) compared to the orthogonal ...