Aviation
Emirates Engineering executes first complete landing gear change for Emirates A380 aircraft
Emirates Engineering executes first complete landing gear change for Emirates A380 aircraft
Dubai, UAE, 29 May 2018– Emirates Engineering has successfully accomplished the first complete replacement of landing gear on A6-EDF, the first Emirates Airbus A380 aircraft to have its entire landing gear system replaced at one time.
Comprising five sets of landing gear – two under the wings, two under the body, and one nose landing gear, the work was planned and executed in-house, at the Emirates Engineering hangars in Dubai.
Every Emirates Airbus A380 aircraft has a landing gear system with a total of 22 landing wheels. In addition to the wheels, the landing gear mechanism of the aircraft includes the gear extension and retraction systems, braking and steering controls, and other monitoring systems. The landing gear of the world’s largest commercial aircraft can support a weight of close to 570 tonnes on take-off and over 390 tonnes on landing.
The process of changing all the landing gears was completed in 14 days with the Emirates Engineering team clocking thousands of man hours during this period. For the duration of the work, the entire aircraft was lifted on jacks to support the body of the aircraft.
Watch a video of the Emirates Engineering team completing the landing gear replacement on A6-EDF.
“The first complete replacement of landing gears on our Airbus A380 aircraft is an important milestone for us. This and other similar achievements by the Emirates Engineering team reflects the degree of planning, preparation and expertise that go behind the successful execution of complex projects such as this one,” said Mohammad Jaffar Nasser, Emirates Senior Vice President, Engineering Maintenance. “By extending our services to third party airlines, we share our expertise and enhance engineering procedures globally,” he added.
Two additional Airbus A380 aircraft from Emirates’ fleet are scheduled to undergo a complete change of landing gear systems over 2018. In addition to investments in infrastructure and facilities including specialised tools, the Emirates Engineering team worked closely with a team of suppliers – Airbus, Field International, UTAS and Safran to plan and execute the landing gear replacement.
Emirates Engineering operates modern and extensive facilities in Dubai, including six heavy maintenance hangars capable of conducting C-Checks on the Airbus A 380 and the world’s largest dedicated aircraft painting facility, to maintain Emirates’ fleet of over 260 Airbus A380 and Boeing 777 aircraft. Emirates Engineering also offers Maintenance, Repair and Overhaul (MRO) services to external parties leveraging off its experience of being the world’s largest operator of the Airbus A380 and the Boeing 777 aircraft.
Aviation
Exploring the Different Types of Helicopter Rotor Systems and the Science Behind Them
Helicopters are unique aircraft that use rotating blades, called rotors, to generate lift and enable flight. The design of these rotor systems is crucial because it affects how helicopters perform, maneuver, and respond to different flying conditions.
There are several types of helicopter rotor systems, each with its own advantages and specific uses. Understanding these systems helps us appreciate the engineering behind helicopters and their diverse capabilities, from search and rescue missions to military operations and aerial photography.
In this Video, we will explore the main types of helicopter rotor systems and how they contribute to the helicopter’s functionality and performance.
1. Single Rotor System
The single rotor system is characterized by a single main rotor blade that is responsible for generating lift. To counteract the torque produced by this rotor, a tail rotor is used. This setup is essential for maintaining directional control and stability during flight.
Uses: This design is prevalent in most conventional helicopters, including iconic models such as the Bell 206 and the Robinson R22. The simplicity of the single rotor system not only reduces mechanical complexity but also enhances efficiency. As a result, it is favored for a variety of applications, including aerial tours, law enforcement, and emergency medical services, where reliability and straightforward operation are paramount.
2. Tandem Rotor System
The tandem rotor system features two parallel rotors of equal size that rotate in opposite directions. This counter-rotation helps to cancel out the torque that each rotor would otherwise produce, resulting in a balanced and stable flight profile.
Uses: This configuration is typically employed in heavy-lift helicopters, such as the CH-47 Chinook. The tandem design allows for an increased payload capacity and enhanced stability, making it particularly effective for transporting troops, equipment, and supplies in military operations, as well as for civilian applications like logging and construction, where heavy lifting is required.
3. Coaxial Rotor System
The coaxial rotor system consists of two rotors mounted one above the other on the same mast, rotating in opposite directions. This innovative design minimizes the need for a tail rotor, allowing for a more compact helicopter structure.
Uses: Coaxial rotor systems can be found in helicopters such as the Kamov Ka-50. This design offers several advantages, including enhanced lift capabilities, improved maneuverability, and better control in various flight conditions. These features make it particularly suitable for military applications, where agility and quick response times are crucial, as well as for specific civilian operations that require high performance in tight spaces.
4. Intermeshing Rotor System
The intermeshing rotor system consists of two rotors that rotate in opposite directions while intersecting each other, but without colliding. This unique configuration creates a highly efficient aerodynamic profile.
Uses: This system is utilized in helicopters like the Kaman K-MAX, designed specifically for heavy lifting and aerial work. The intermeshing rotors provide remarkable stability and lift capabilities, making it particularly effective for operations in confined spaces, such as urban environments or dense forests. It is ideal for missions that involve heavy external loads, including construction, firefighting, and disaster relief efforts.
5. Transverse rotor system
The transverse rotor system has two parallel rotors that spin in opposite directions, improving lift and stability. This design enhances the aircraft’s aerodynamic efficiency and maneuverability.
A notable example of this system is the V-22 Osprey, a tiltrotor aircraft that merges helicopter vertical lift with the speed of a fixed-wing plane. allowing the Osprey to operate in tough environments like urban areas and remote locations. It can carry heavy loads and personnel, making it suitable for troop transport, search and rescue, medical evacuation, and logistical support in military operations. Overall, the transverse rotor system enhances the V-22 Osprey’s effectiveness and operational flexibility.
6. Compound Rotor System
The compound rotor system combines traditional rotor systems with fixed wings and other aerodynamic features to enhance efficiency and speed. This hybrid approach allows for greater aerodynamic performance than standard rotorcraft.
Uses: Advanced helicopters like the Sikorsky X2 and Boeing’s DBF (Defiant) utilize the compound rotor system. These helicopters are designed for higher speeds and longer ranges, making them suitable for military operations, search-and-rescue missions, and law enforcement tasks where rapid response and extended operational capabilities are essential.
7. NOTAR system
NOTAR system replaces the traditional tail rotor with a ducted fan and directional airflow to counter the torque from the main rotor. It works by pushing air through the tail boom and out through side vents, creating thrust that stabilizes the helicopter. This design reduces noise, boosts safety, and cuts down on maintenance.
Uses: The NOTAR system is found in helicopters like the MD 520N and MD 902 Explorer. Without an exposed tail rotor, it lowers the risk of rotor strikes, making it safer for operations in tight spaces. Its quieter performance is ideal for missions where low noise is needed, such as urban air operations, police work, and medical evacuations.
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