Diyvehiclerepair
A helicopter tail rotor serves two essential functions. It provides a counteracting force to the helicopter's main rotor; without the sideways thrust produced by the tail rotor, the torque generated by the main rotor would spin the helicopter's body in the opposite direction.
- Can you fly a helicopter without a tail rotor?
- Why do some helicopters have no tail rotors?
- What happens if a helicopter loses its tail rotor?
- Why is the tail rotor important?
- Why does a helicopter have two rotors?
- Are NOTAR helicopters safer?
- Why does a Chinook not have a tail rotor?
- What is the difference between a helicopter with a tail rotor and a helicopter with a NOTAR configuration?
- Can a helicopter fly without power?
- How do you stop a helicopter from spinning?
- How recover from LTE?
- How do helicopter rotors work?
- Can a Chinook carry a tank?
- What is the benefit of coaxial rotors?
- Why do helicopters have coaxial rotor?
Can you fly a helicopter without a tail rotor?
One significant advancement in the last decade has been the no-tail rotor, or NOTAR, helicopter. As you now know, vertical-lift flight is impossible without a tail rotor to counteract the torque produced by the main rotor. Unfortunately, the much-smaller tail rotor makes a lot of noise and is often easily damaged.
Why do some helicopters have no tail rotors?
A: All helicopters do not need tail rotors. The tail rotor counteracts the angular momentum created by the main rotor, to control the machine. Some helicoptors have different ways to counteract the momentum without using the tail rotor, such as those that use two main rotors or those that use NOTAR.
What happens if a helicopter loses its tail rotor?
The helicopter will immediately begin spinning and the pilot will need to close the throttle and perform a hovering autorotation. ... In addition to issues resulting from the loss of tail rotor thrust, the helicopter will pitch down and the pilot most likely will not have sufficient aft cyclic movement to recover.
Why is the tail rotor important?
A helicopter tail rotor serves two essential functions. It provides a counteracting force to the helicopter's main rotor; without the sideways thrust produced by the tail rotor, the torque generated by the main rotor would spin the helicopter's body in the opposite direction.
Why does a helicopter have two rotors?
With two main rotors, you spin them in opposite directions, so they cancel out each other's torque without the need for a tail rotor. And now, 100% of your engine power drives the main rotors which lift the helicopter and propel it forward.
Are NOTAR helicopters safer?
Studies have shown that 21 percent of all crashes are due to tailrotor strikes or loss of tail rotor effectiveness; NOTAR® systems eliminate these problems. Designed and tested to be 50 percent quieter than any other helicopter. NOTAR-equipped helicopters are among the quietest certified helicopters available.
Why does a Chinook not have a tail rotor?
To provide the anti-torque necessary for the stability a tail rotar is mounted horizontally which in addition provides direction control. In absence of tail rotar as in case of Chinook, the torque generated is nullified by the opposite spin of rear and fore rotors.
What is the difference between a helicopter with a tail rotor and a helicopter with a NOTAR configuration?
The tail rotor is operated by what would appear to be 'rudder' pedals. A 'notar' helicopter uses a variable jet efflux from the main engine to provide a variable thrust to counteract the torque of the main rotor blade. Again it is operated by foot operated pedals.
Can a helicopter fly without power?
Unlike a plane, which can glide a large distance with no power, a helo has no way to slow down—or so the thinking goes. ... Actually, helicopters have a built-in mechanical control called the collective pitch lever that allows them to descend slowly and land even if the engine dies. This maneuver is called autorotation.
How do you stop a helicopter from spinning?
If the helicopter is in a hover, or at low speed when the tail rotor loses thrust the only way to remove the spinning moment is to remove the torque creating it.
How recover from LTE?
Recovery from an unexpected yaw movement is initiated by applying forward cyclic control to increase airspeed, and reducing power if at a safe altitude. If these measures are not effective, an entry into an autorotation may be necessary, applying full opposite rudder until rotation stops.
How do helicopter rotors work?
Unlike airplanes, helicopters feature spinning wings called blades or rotors on top. As a helicopter's blades spin, they create a force called lift that allows the helicopter to rise into the air. ... The rear rotor can face different directions, allowing the helicopter to move forward, backward, and sideways.
Can a Chinook carry a tank?
The Chinook is equipped with two T55-GA-714A turboshaft engines, which are pod-mounted on either side of the rear pylon under the rear rotor blades. The self-sealing fuel tanks are mounted in external fairings on the sides of the fuselage. ... Three additional fuel tanks can be carried in the cargo area.
What is the benefit of coaxial rotors?
The saved power helps coaxial rotors reach a higher hover ceiling than single rotor helicopters. Another advantage of coaxial rotors is that the overall rotor diameter can be reduced for a given vehicle gross weight because each rotor provides a maximum contribution to vertical thrust to overcome vehicle weight.
Why do helicopters have coaxial rotor?
Having two coaxial sets of rotors provides symmetry of forces around the central axis for lifting the vehicle and laterally when flying in any direction. Because of the mechanical complexity, many helicopter designs use alternate configurations to avoid problems that arise when only one main rotor is used.
