What is an anti-torque rotor?
: a small rotor mounted on the tail of a helicopter that balances the torque reaction of the main lifting rotor and thus permits the craft to maintain a desired heading.
What is an anti-torque system?
To prevent spinning of the upper non-rotated part of the electromechanical drill, an ‘anti-torque system’ has to be included in the downhole unit. Usually the anti-torque system has a blade form of various designs that engages with the borehole wall and counteracts the torque from the stator of the driving motor.
What is the necessary of anti-torque rotor?
Single main rotor helicopters are the most common type of helicopter They need an anti-torque device (tail rotor or other anti-torque system) to counteract the twisting momentum produced by the main rotor, which is powered by one or more engine(s).
What is the importance of anti-torque system in helicopter?
The antitorque pedals allow the pilot to control the pitch angle of the tail rotor blades, which in forward flight puts the helicopter in longitudinal trim and, while at a hover, enables the pilot to turn the helicopter 360°.
Do helicopters vibrate?
A helicopter main rotor is capable of producing vibrations in both the vertical and lateral planes. A vertical vibration is a result of unequal lift produced by the main rotor blades. This vibration is a result of the airframe rolling with the mass effect caused by the unequal vertical lift component.
What are the different types of tail rotors?
The most common is the multi-bladed rotor, the Fenestron from Airbus, the NOTAR from MD helicopters, then the helicopters with no tail rotor, like the chinook. Each counteracts the main rotor torque. This got me thinking about all the different types of tail rotor systems and how I could easily explain the differences about each one.
How does a tail rotor work on a helicopter?
The tail rotor or Anti-Torque system creates thrust to push the tail boom in the opposite direction to which it wants to turn from the torque. When the thrust from the anti-torque system matches the torque being created by the main rotor the helicopter will remain pointing forward when it lifts off the ground.
How is the pitch of the tail rotor adjustable?
The pitch of the tail rotor blades is adjustable by the pilot via the anti-torque pedals, which also provide directional control by allowing the pilot to rotate the helicopter around its vertical axis.
What causes the tail boom to hug the main rotor?
This creates a boundary layer which causes the downwash from the main rotor to hug the tail boom according to the Coandă effect. This creates a force which cancels out the main rotor torque and provides directional control. The advantages of the system are similar to the Fenestron system discussed above.