Buzz
Air travel has become an everyday part of life in our contemporary world. When most people think of commercial planes, they typically envision the classic tube-and-wing design. But aerospace engineers from all corners of the globe are working on futuristic airliner concepts that could revolutionize air travel as we know it.
10. The Aether Airship
Airships were once an integral part of commercial aviation before gradually fading away in the mid-20th century. However, some visionary aerospace designers are now revisiting the idea, working on concepts to reintroduce airships into the aviation scene.
One of the most fascinating designs is the Aether airship. Mac Byers, its designer, understood the need to make his airship look distinct from older models, ensuring it wouldn't be associated with tragic events like the Hindenburg disaster. As a result, the Aether airship features a sleek, shark-like design that conveys both safety and futuristic appeal.
This airship is more akin to a luxury cruise ship than a typical airliner. The Aether airship would journey to various destinations, providing ample amenities to passengers so they wouldn't need to disembark unless they chose to.
Passengers would enjoy a wide array of dining options and spacious rooms for relaxation. Byers’s design embraces the expansive sky with large windows that allow passengers to take in breathtaking views.
While the Aether airship is still just a concept, it offers a fascinating glimpse into the future of air travel. Other companies are also exploring airship designs. They are more cost-efficient, have impressive payload capacities, and provide a unique travel experience for today’s explorers. In the near future, airships may well make a comeback.
9. Boeing Blended-Wing Airliners
Despite Boeing recently beginning production of its 787 airliner, the company’s engineers are already focused on the next big thing. This time, Boeing is planning a bold departure from its traditional designs.
Rather than sticking to the traditional fuselage-and-wing design, Boeing engineers are exploring the creation of a blended-wing airliner. In this innovative design, the wings and fuselage seamlessly merge, eliminating the traditional separation between the two.
Both NASA and Boeing are currently testing blended-wing designs for both commercial and military applications. To investigate the aerodynamic potential, the two organizations collaborated on the development of the X-48, an unmanned jet aircraft featuring a blended-wing structure.
The X-48 tests proved to be successful, demonstrating that the aircraft had a high payload capacity, was quieter than anticipated, and exhibited remarkable fuel efficiency. This indicates that blended-wing technology is poised to be a key feature in the future of aerospace.
NASA is considering the civilian uses of this design, with plans to create airliner prototypes within the next 20 years. Meanwhile, Boeing is focusing on military applications, particularly for airlift and aerial refueling operations.
Lockheed Martin is also exploring the potential of blended-wing technology for future airlift designs. The company aims to develop an aircraft capable of carrying an enormous payload.
Given that these companies are investing in blended-wing technology, it is highly probable that the next generation of airliners will adopt the concepts introduced by the X-48.
8. Reaction Engines A2
Another significant advancement in aerospace is the development of hypersonic airliners. While the Concorde and TU-144 made history as the first commercially operated supersonic airliners, today’s engineers are pushing the boundaries to design aircraft capable of speeds exceeding Mach 5.
At the forefront of this innovation is UK-based Reaction Engines Limited, which has designed a concept for an airliner known as the A2. This cutting-edge aircraft would achieve hypersonic speeds while remaining environmentally friendly.
The A2 is powered by the Scimitar engine, another innovative creation from Reaction Engines. The Scimitar engine utilizes technology derived from the SABRE engine, combining hybrid engine principles. While the SABRE uses rocket propulsion, the Scimitar combines a ramjet and a conventional air-breathing jet engine design.
When the Scimitar reaches high speeds, it operates as a ramjet. However, during takeoff and landing, it switches to a high bypass mode, functioning similarly to a conventional jet engine. The Scimitar uses liquid hydrogen as fuel, which also serves to cool the engine just before ignition. This type of engine, known as a pre-cooled engine, is designed for long-range hypersonic flight.
To mitigate the impact of sonic booms, the A2 would only travel at hypersonic speeds over oceans or sparsely populated areas. When flying over populated regions, it would fly just below the speed of sound.
At its top speed, the A2 could make the journey from Australia to northern Europe in a mere five hours. However, one major concern with the A2 is passenger comfort. Due to potential stress on the airframe, the A2 does not feature windows, which may cause discomfort for passengers with claustrophobia.
7. Bombardier Antipode
Not wanting to be outdone by the UK in the realm of hypersonic aerospace innovation, Canadian company Bombardier has entered the race with their Antipode concept—a business jet capable of reaching Mach 24. This compact aircraft, designed for only a few passengers, could travel from New York to London in just 11 minutes.
The Antipode concept utilizes a scramjet engine, which is a simplified enhancement of the traditional ramjet. Scramjets operate without any moving components like fans or compressors. Instead, they rely on the aircraft's speed to force air through the engine.
As the scramjet flies at high Mach speeds, hypersonic air enters the engine and slows to supersonic velocities. Additional hypersonic air follows the slowed air, pushing it through the engine and generating thrust through combustion.
To reach the necessary speeds for the scramjet to function, the Antipode would rely on rocket boosters for takeoff. Once the plane reaches cruising altitude and speed, the scramjet would engage, propelling the aircraft to Mach 24.
One major concern is the excessive heat the aircraft body would experience at such high speeds due to air friction. Bombardier has proposed a solution known as long penetration mode, where vents in the nose of the plane would direct chilled supersonic air over the fuselage, cooling it down while also minimizing sonic boom noise.
While it's uncertain whether the Antipode will ever be operational, the technologies developed for it may pave the way for the next generation of airliners.
6. Boeing Pelican
In the early 2000s, Boeing explored the possibility of creating a new transoceanic aircraft called the Pelican. Although originally designed to transport cargo, the ideas behind the Pelican could be applied to commercial aviation. The Pelican was envisioned as a massive airplane that utilized the ground effect to stay airborne.
The ground effect is a phenomenon where low-flying objects with uniquely designed wings trap air beneath them, creating a cushion that allows them to glide swiftly and efficiently over water. The Pelican would use this effect over the ocean, flying just 6 meters (20 ft) above the water’s surface.
When flying over land, the Pelican would operate at standard altitudes. By utilizing the ground effect, Boeing hoped to achieve remarkable fuel efficiency, which was crucial for such a massive aircraft. With a wingspan of 150 meters (500 feet), the Pelican would have been the largest airplane in existence.
Although the design showed great promise, Boeing has not revisited the concept since the early 2000s for reasons unknown. However, the idea of a ground-effect transport may resurface in commercial aviation due to its ability to carry ship-like loads at higher speeds while consuming minimal fuel.
5. SAX-40
Even at subsonic speeds, the noise produced by airplanes' engines is disruptive to those living near airports and can lead to serious health concerns for workers around planes. To address this, a collaboration between MIT and Cambridge University introduced the SAX-40, an innovative airplane concept designed to be significantly quieter.
The main source of noise in airplanes comes from irregularities in their structures, which is why the SAX-40 is exceptionally streamlined. Its aerodynamic design allows it to generate much more lift compared to a typical airplane, eliminating the need for flaps during takeoff and landing and significantly reducing engine noise.
The SAX-40's engine intakes are positioned on top of the aircraft, helping to shield people on the ground from the engine noise. To further minimize the sound of the exhaust, the plane features adjustable exhausts that adapt during flight, ensuring minimal noise.
The SAX-40 features a number of innovative design elements. Thanks to its lifting body and specially designed wings, the aircraft would generate just 63 decibels of noise during takeoff and landing, even outside the airport perimeter. In contrast, conventional jets produce around 100 decibels. The SAX-40 would make as little noise as an air-conditioning unit.
4. SpaceLiner
The German Aerospace Center (GAC) is working on its own cutting-edge design for high-speed transportation. Rather than relying solely on traditional airplane concepts, GAC is developing a revolutionary spaceplane called the SpaceLiner.
The SpaceLiner concept merges the advantages of both a rocket and an airplane. Much like the US space shuttle, the SpaceLiner utilizes a two-stage design. It is propelled into high orbit by a cryogenic rocket booster, which is then detached once the desired altitude is reached.
In order to ensure reusability, the GAC is developing specialized planes that will be capable of capturing the falling booster mid-air. At extremely high altitudes, the SpaceLiner can accelerate to Mach 25, allowing it to travel from Australia to Europe in under 90 minutes.
At the end of its journey, the SpaceLiner descends and lands just like a regular airplane. This innovative project offers numerous benefits, including remarkable speed and reusability. Additionally, the SpaceLiner is environmentally conscious. By utilizing liquid hydrogen and liquid oxygen as rocket fuel, its engines produce only water vapor as a by-product. The GAC envisions the SpaceLiner becoming operational by 2050.
3. Mobula
Designed by Chris Cooke of Coventry University, the Mobula is one of the most unconventional airliner concepts in recent years. This stunning design merges the ideas of airplanes and ocean liners. With the capacity to carry over 1,000 passengers across five decks, the Mobula offers more than just a means of transport; it promises an unforgettable journey.
Similar to the Pelican, the Mobula is an ekranoplan. It flies just a few meters above the ocean's surface, utilizing the ground effect for both lift and swift travel. For operations on water, the Mobula is equipped with floating capabilities, allowing it to rest effortlessly on the water’s surface.
Inspired by the shapes found in nature, Cooke designed the Mobula with an organic aesthetic. However, the design isn’t just for visual appeal. In wind tunnel experiments, the Mobula demonstrated outstanding performance for low-altitude flight with minimal drag.
While the Mobula will likely remain a conceptual design, it offers a glimpse into the potential future of air travel. Large, high-speed ekranoplans could revolutionize how we travel across oceans. Even if the Mobula never comes to life, it may still serve as an essential precursor to a future transformation in aviation.
2. Concorde 2
Though the Concorde, the world’s first supersonic airliner, was retired, its legacy endures in the next generation of aircraft. Recently, Airbus secured patent rights for the design of a new aircraft called the Concorde 2. Like its predecessor, this updated version aims to redefine aviation by becoming the first hypersonic airliner.
The standout feature of the new Concorde 2 would be its impressive Mach 4.5 cruising speed. However, the plane boasts several other unique characteristics, particularly its propulsion system. The Concorde 2 would be powered by three distinct types of engines.
For takeoff, the Concorde 2 would employ lift jets for a vertical ascent, similar to the Harrier jump jet. After getting airborne, a rocket engine would propel the aircraft to its designated altitude and supersonic speeds. Finally, wing-mounted ramjets would push the plane to its Mach 4.5 cruising velocity.
To minimize sonic booms, the Concorde 2 features an unconventional wing design that also offers significant lift. While the Concorde 2 would achieve greater speeds than the original, it would have a much smaller passenger capacity, seating just 20 people compared to the Concorde's 120.
1. AWWA-QG Progress Eagle
The AWWA-QG Progress Eagle is one of the most intricate concept aircraft in development. At first glance, it may seem like a fusion of every futuristic technology imaginable, but in reality, the Progress Eagle is a legitimate proposal for a large, eco-friendly passenger airplane.
The Progress Eagle is an enormous aircraft, dwarfing all other airliners with its three-tiered design and a capacity of 800 passengers. To accommodate its immense size, the Progress Eagle features folding wings, ensuring that existing airports won't need significant renovations.
Powered by six hydrogen engines, the Progress Eagle generates electricity during its flight. However, most of the electrical power comes from the solar panels integrated into its wings, which incorporate quantum dot materials to enhance efficiency.
The Progress Eagle is also equipped with a CO2 scrubber that actively cleans the air as it flies. Designer Oscar Vinals is hopeful that his innovative aircraft will enter service by 2030.
