How does a Fenestron work?

How does a Fenestron work?

The Fenestron, pictured below, is essentially the same concept as a conventional 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.

What is an anti-torque system?

Antitorque System:Helicopters which have single main rotor system require an antitorque system because main rotor force the aircraft to rotate. The antitorque system prevents the helicopter to rotate around itself. Tail rotor system is used to obtain antitorque.

What is a Fenestron tail rotor?

A Fenestron (sometimes alternatively referred to as a fantail or a “fan-in-fin” arrangement) is an enclosed helicopter tail rotor that operates like a ducted fan. The term Fenestron is a trademark of multinational helicopter manufacturing consortium Airbus Helicopters (formerly known as Eurocopter).

What is a tail rotor system and its purpose?

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.

What 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 types of anti-torque system?

Types of Helicopter Anti-Torque Systems

• Bladed Tail Rotor.
• Fenestron Tail Rotor.
• NOTAR.
• No System.

How do Notars work?

How does it work? The enclosed variable-pitch composite blade fan produces a low pressure, high volume of ambient air to pressurize the composite tailboom. The air is expelled through two slots which run the length of the tailboom on the starboard (right) side, causing a boundary-layer control called the Coanda Effect.

What are the types of Antitorque system?

What are the 3 major components of the main rotor system?

Main Rotor System The rotor consists of a mast, hub, and rotor blades. The mast is a hollow cylindrical metal shaft which extends upwards from and is driven and sometimes supported by the transmission.

What is the advantage of NOTAR over the other types of anti torque system?

The NOTAR® anti-torque system eliminates all of the mechanical disadvantages of a tail rotor, including long drive shafts, hanger bearings, intermediate gearboxes and ninety-degree gearboxes.

What is the purpose of the anti torque system for helicopters?

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°.

How does NOTAR work?

How do intermeshing rotors work?

Unsourced material may be challenged and removed. Intermeshing rotors on a helicopter are a set of two rotors turning in opposite directions, with each rotor mast mounted with a slight angle to the other, in a transversely symmetrical manner, so that the blades intermesh without colliding.

What is a NOTAR helicopter?

NOTAR (“no tail rotor”) is a helicopter system which avoids the use of a tail rotor. It was developed by McDonnell Douglas Helicopter Systems (through their acquisition of Hughes Helicopters).

What is anti torque rotor?

Definition of antitorque 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 helicopter transmission?

The transmission system transfers power from the engine to the main rotor, tail rotor, and other accessories during normal flight conditions. The main components of the transmission system are the main rotor transmission, tail rotor drive system, clutch, and freewheeling unit.

What is mass bumping?

Mast bumping is contact between an inner part of a main rotor blade or a rotor hub and the main rotor drive shaft (or ‘mast’). Serious mast bumping in flight usually results in the helicopter breaking up in flight, which is fatal for those on board.

What is the operation of NOTAR?

It was developed by McDonnell Douglas Helicopter Systems (through their acquisition of Hughes Helicopters). The system uses a fan inside the tail boom to build a high volume of low-pressure air, which exits through two slots and creates a boundary layer flow of air along the tailboom utilizing the Coandă effect.

Are NOTAR helicopters safe?

This, they say, is due to the elimination of the turbulent air generated by a tail rotor, and makes it arguably the quietest helicopter in the world. Best of all, NOTAR is a very safe anti-torque system. Even when running at full power, there isn’t thing that will hurt ground personnel.

What is the advantage of NOTAR over the other types of anti-torque system?