Will air travel ever be faster?

Will air travel ever be faster? Aerospace start-ups are working on making this a reality with supersonic and hypersonic planes. Supersonic means faster than the speed of sound (Mach 1), while hypersonic means travelling at five times faster than the speed of sound (Mach 5).



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Aerospace start-ups are working on making this a reality with supersonic and hypersonic planes. Supersonic means faster than the speed of sound (Mach 1), while hypersonic means travelling at five times faster than the speed of sound (Mach 5).

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Fifty years ago, the federal government banned all civilian supersonic flights over land. The rule prohibits non-military aircraft from flying faster than sound so their resulting sonic booms won't startle the public below or concern them about potential property damage.

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The next generation of aircraft At the other end of the scale are eVTOL (electric vertical take-off and landing) aircraft – air taxis that are expected to become commercially active within the next few years. “Air taxis are not only sustainable, but they will change our lives completely.

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Hybrid and all-electric planes
Experts believe hybrid and fully battery-powered planes, which offer less range than conventional aircraft, will begin to dominate the short-haul flight sector by 2030, becoming the go-to craft for flights under three hours.

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The power, or volume, of the shock wave depends on the quantity of air that is being accelerated, and thus the size and shape of the aircraft. As the aircraft increases speed the shock cone gets tighter around the craft and becomes weaker to the point that at very high speeds and altitudes no boom is heard.

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Changes in speed are expressed in multiples of gravitational acceleration, or 'G'. Most of us can withstand up to 4-6G. Fighter pilots can manage up to about 9G for a second or two. But sustained G-forces of even 6G would be fatal.

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Currently, U.S. law prohibits flight in excess of Mach 1 over land unless specifically authorized by the FAA for purposes stated in the regulations. The two supersonic rulemaking activities would not rescind the prohibition of flight in excess of Mach 1 over land.

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According to Drela, today's airplane builders actually favor a smaller, lighter, and therefore slower aircraft that peaks its fuel efficiency at slower speeds. (Cars also become more efficient at slower speeds on highways.)

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Over the next 10-15 years, the global pilot workforce will undergo a dramatic change. Aviation is continuing to grow, creating a demand for pilots that exceeds supply in most places; at the same time, an increasing number of pilots in the baby-boom generation are reaching mandatory retirement age.

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Aside from the realities of the physics of flight, people will always want to be on the move. Demand for air travel will keep growing in the foreseeable future, according to IATA, whose recent figures show that demand is expected to reach 94% of 2019 levels in 2023 and will increase to 103% in 2024 and 111% in 2025.

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The wings of a 747 are nowhere near strong enough to mount an engine capable of supersonic flight. Generally, engines used in aircraft like the Concorde or the F-22 are skinny and long. They also weigh quite a fair amount, further requiring a complete overhaul of the way the engines would be supported.

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Fifty years ago, the federal government banned all civilian supersonic flights over land. The rule prohibits non-military aircraft from flying faster than sound so their resulting sonic booms won't startle the public below or concern them about potential property damage.

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If you're WONDERing about how pilots handle sonic booms, they actually don't hear them. They can see the pressure waves around the plane, but people on board the airplane can't hear the sonic boom. Like the wake of a ship, the boom carpet unrolls behind the airplane.

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In the current estimate for 2021-2040, over the next two decades 612,000 new pilots will be required worldwide, with 130,000 of these in North America, primarily the U.S.. Expectations are similar for other staff in the aviation industry such as mechanics and cabin crew, as the whole market expands.

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Air travel accounts for approximately 2.5% of the world's CO2 emissions. By contrast, 18% of CO2 emissions come from animal agriculture and nearly 20% from deforestation. If we really want to reduce CO2 emissions, cutting out meat and putting a stop to deforestation would make much more of an impact.

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