NASA’s supersonic “Son of Concorde” plane which will halve the travel time between London and New York is zooming ever closer to take-off.
The X-59 jet will even break the sound barrier when it flies – but won’t produce a sonic boom, thanks to its unique design.
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When up and running, the aircraft will hurtle along at altitudes of at speeds of 937mph at 55,000 feet up.
Nasa revealed it struck another milestone in the plane’s journey toward the skies with crucial low-speed taxiing tests.
The X-59 moved around purely under its own power for the first time at US Air Force Plant 42 on July 10.
Taxiing is the final stage of ground tests before Nasa can take it up into the skies – and the maiden voyage is chalked for later this year.
Over the coming weeks, pilots will gradually increase the speed on the runway – leading to high-speed manoeuvres when it will travel fast enough to take off.
Engineers tested key systems like steering and breaking during the low-speed run through.
Nasa said: “These checks help ensure the aircraft’s stability and control across a range of conditions, giving pilots and engineers confidence that all systems are functioning as expected.”
The X-59 is the crown jewel in Nasa’s Quesst mission – which aims to prove supersonic flight is possible without a deafening sonic boom.
Instead, the X-59 will produce a much quieter sonic “thump”.
Currently, commercial passenger planes are banned from going at such speeds – if they were able to – over land in the UK and US on account of the noise levels.
The 30m-long and 9m-wide X-59 has a sharp, stiletto-style nose that engineers believe will reduce the noise
The space agency believes their new jet could fly from London to New York in three-and-a-half hours.
Lori Ozoroski, a project manager at Nasa, previously said: “We had a commercial supersonic aircraft, the Concorde.
“But it was limited during its flights that it could not fly, say into, you know, somewhere in the middle of the U.S.
“You were not allowed to fly supersonic over land.
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“So most of the flights were back and forth just over the ocean. And so again, that ban has been in place for 50 years, over 50 years in the US.
“A lot of international countries as well have similar bans.
“And so the whole goal of this research that we’re doing right now is to lift that ban and set a speed limit for commercial supersonic aircraft rather than a speed limit.”
Lori added: “The sound level is more like – we’ve done studies – it’s more like a car door closing, you know, across the street at your neighbour’s house rather than the very loud typical sonic boom.”
Supersonic and Hypersonic Jets
There are several types of hypersonic and supersonic jets. A breakdown of what’s been happening in the industry and what’s expected in the coming years.
Talon-A
- Built by Stratolaunch
- Reported speeds of Mach 5
- The first test flight conducted in 2024
X-59 Quesst
- Built by Nasa and Lockheed Martin
- Predicted max speeds of Mach 1.4
- The first test flight in 2025 – but subject to delays
Venus Stargazer M4
- Built by Venus Aerospace and Velontra
- Predicted max speeds of Mach 6
- First test flight in 2025
Quarterhorse MKII
- Built by Hermeus
- Predicted max speeds of Mach 2.5
- First test flight in 2026
Halcyon
- Built by Hermeus
- Predicted max speeds of Mach 5
- First test flight by 2030
Nanqiang No 1
- Built by China’s hypersonic plane programme
- Predicted max speeds of Mach 6
- First test flight in 2025
DART
- Built by Hypersonix Launch Systems
- Predicted max speeds of Mach 7
- First test flight in 2025
