Connect with us

Aviation

QANTAS’ NEW YORK TO SYDNEY NON-STOP RESEARCH FLIGHT SET FOR TAKE-OFF

qantas newyork

Qantas’ first Project Sunrise (opens in new window) research flight is set to take off from New York to Sydney this evening. 

Qantas Flight 7879, with 50 passengers and crew on board, will depart New York’s John F Kennedy Airport at 9pm New York as the first commercial airline to fly non-stop between New York and Sydney.

The 787-9 aircraft has been positioned to New York after being delivered from the Boeing factory in Seattle. After the research flight is complete, it will enter normal commercial service with Qantas. 

The purpose of the record-breaking flight is to conduct scientific research on passengers and crew on an ultra-long haul flight, with the aim of increasing health and wellness, minimising jetlag and identifying optimum crew rest and work periods.

It is part of Qantas’ ongoing quest to launch commercial flights between the east coast of Australia (Sydney, Melbourne and Brisbane) and New York and London. The direct flights would save passengers up to four hours in total travel time and follow the successful Perth-London route, which started in March 2018 and is the only direct link between Australia and Europe.

Qantas Unveils Limited Edition Scarf ..!!(Opens in a new browser tab)

Advertisement

 

While not designed for the 16,200 kilometre (10,200 mile) journey from New York to Sydney, the 787-9 being used for today’s research flight will take off with maximum fuel and a restricted passenger and baggage load (and no cargo) to allow the aircraft to operate the flight non-stop. All carbon emissions from this flight, and two additional research flights from New York and London to Sydney in November and December, will be offset. 

Airbus and Boeing have pitched aircraft (the A350 and 777X respectively) with the range to operate Project Sunrise flights on a commercial basis. These pitches, together with findings from the research flights and other streams of work, will form part of a business case being developed by Qantas to inform a final yes/no decision on Project Sunrise expected by the end of this year. If approved, flights would start in 2022/23.    

Qantas has named its endeavor “Project Sunrise” after the airline’s historic ‘Double Sunrise’ endurance flights during the Second World War, which remained airborne long enough to see two sunrises.

 

Advertisement
Advertisement

Aviation

Exploring the Different Types of Helicopter Rotor Systems and the Science Behind Them

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.

Advertisement

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.

Advertisement

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.

Advertisement

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.

Continue Reading

Trending