Are NOTAR helicopters better?

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.

What do you think is the advantage of using a Fenestron anti-torque system?

Overall advantages of the Fenestron include significantly higher safety levels on the ground, during landing/takeoff operations in confined areas, and in flight; enhanced anti-torque control efficiency; reduced power demand in forward flight; and lower sound and vibration levels.

What are the disadvantages of NOTAR?

One possible disadvantage might be fuel consumption – it is quite possible that the ducted fan and the air turning a corner isn’t as efficient as a propeller, so fuel consumption might be higher, but not that much higher.

What is the main advantage of Notor over traditional tail rotor configuration?

Benefits of the NOTAR system include increased safety (the tail rotor being vulnerable), and greatly reduced external noise as tail rotors on helicopters produce a lot of noise.

Can helicopters fly without 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.

How does a fenestron work?

The Fenestron System. The Fenestron is a Trademarked Anti-Torque system used on many Eurocopter, now Airbus Helicopters. This anti-torque system works by placing a multi-bladed fan within a duct in the tail of the helicopter. The duct is integrated into the tail boom and is usually made of a fiberglass skin.

What is the importance of anti-torque system in helicopter?

These blades are called a tail rotor or anti-torque rotor, and their purpose is to create a force (thrust) that acts in the opposite direction of the way the helicopter is trying to rotate.

What is the advantage of the tandem rotor system?

Tandem Rotor Counter-rotating rotor blades will not collide with and destroy each other if they flex into the other rotor’s pathway. This configuration has the advantage of being able to hold more weight with shorter blades, since there are two blade sets.

What happens when helicopter loses tail rotor?

If the tail rotor fails in flight, engine torque can no longer be countered by the tail rotor, and uncontrolled spinning of the aircraft is a possibility. Most manufacturers call for an immediate autorotation. Some call for a running landing, instead.

What are the pros and cons of a no tail rotor helicopter?

No tail rotor: use of a ducted fan within the helicopter’s body, and venting the air through the side of the tail boom to get the desired anti-torque. One big advantage is simplicity and ruggedness: no tail rotor to get damaged, no tail rotor gearbox or driveshaft to wear and/or malfunction.

What are the advantages of NOTAR helicopters?

No tail rotor: use of a ducted fan within the helicopter’s body, and venting the air through the side of the tail boom to get the desired anti-torque. One big advantage is simplicity and ruggedness: no tail rotor to get damaged, no tail rotor gearbox or driveshaft to wear and/or malfunction. Another is noise: NOTAR is quieter.

What is the difference between a Fenestron and a tail rotor?

Both systems feature spinning blades that generate a thrust force to cancel out the tendency of a helicopter fuselage to rotate. However, the Fenestron rotor differs from a conventional rotor by adding several more blades. Whereas a conventional tail rotor seldom has more than four blades, a typical Fenestron includes eight to thirteen blades.

What is a Fenestron on a helicopter?

A Fenestron (or fantail, sometimes called “fan-in-fin”) is a shrouded tail rotor of a helicopter that is essentially a ducted fan. The housing is integral with the tail skin, and like the conventional tail rotor it replaces, it is intended to counteract the torque of the main rotor.