NASA has released a time-lapse video of construction work on an experimental new supersonic jet dubbed “son of Concorde”.
The 40-second clip shows manufacturing of the X-59 Quiet SuperSonic Technology, or QueSST, aircraft from May 2019 to June 2021.
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Aerospace giant Lockheed Martin is carrying out the work at a facility in Palmdale, California. Nasa says it’s on track to start flight tests in 2022.
Once completed, the X-59 will cruise at Mach 1.4 – which is 925mph and faster than the speed of sound (767mph).
Its party trick is that its sonic boom is expected to sound no louder than the thump of a car door closing at ground level.
That means the jet can fly without producing a startling boom for people below, a problem suffered by Concorde, which was retired in 2003.
Before any flights can take place, Lockheed engineers and technicians are working to merge the major aircraft sections together.
The time-lapse released on Tuesday shows the nascent vehicle looking like an actual aircraft for the first time since construction began 2018.
“We’ve now transitioned from being a bunch of separate parts sitting around on different parts of the production floor to an airplane,” said Nasa engineer Jay Brandon.
The aircraft is being put together using features on the structure that allow engineers to precisely line-up its components.
Those include the aircraft’s wing, tail assembly, and fuselage or forward section – all three of which are connected in the video.
Laser projections are then used to ensure each part has been precisely fitted.
It all fits together a bit like Lego bricks, according to Lockheed Martin’s David Richardson.
“The extensive use of features and pre-drilled, full-size fastener holes has significantly reduced the time it takes to locate and fit parts, especially mating large assemblies like this,” he said.
“It is sort of like how Legos go together. We used the laser tracker to make sure it is all aligned per the engineering specs before we permanently bolted it all together.”
Quiet as a mouse
Nasa greenlit the project to be built by Lockheed Martin in 2019. The cost of the program is $247.5million (£189.7million).
Once fully constructed, the X-59 is expected to be 94 feet long with a wingspan of 29.5 feet.
It will boast a maximum take-off weight of 32,300lbs, and cruise at an altitude of 55,000 feet.
The craft will be propelled by a single General Electric F414 engine, and will sport a 4K camera at the front for added visibility.
The goal is to create a plane that can cruise at Mach 1.42 speeds, with a sonic boom one-thousand times quieter than previous supersonic aircraft.
The barrier for supersonic flight is 768mph – a speed known as Mach 1.
When flying at the speed, sound waves can’t get out of the way fast enough, and so create an audio “wake”.
This is known as a sonic boom, and is a loud and annoying giveaway that a supersonic plane is flying overhead.
A Concorde’s “perceived” sound was 110dB – which is thousands of times louder than the X-59’s planned noise level.
Air experts hope the shape of the X-59 will max its sonic boom out at between 60dB and 75dB for people on the ground.
If successful, Nasa’s design could be rolled out for commercial flights – or possibly even the US military.
Lockheed Martin is constructing the aircraft at a facility in Palmdale, California[/caption]
Once completed, the X-59 will move faster than the speed of sound[/caption]
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