British driver who broke sound barrier sets new speed record

Andy Green, the Royal Air Force pilot who first broke the sound barrier in a car, has pushed the envelope again. On 19 May 2024 at the H3 Hydrogen Hypercar test site in Wales, he piloted the hydrogen‑fuel‑cell‑powered H3 to an official top speed of 406 mph (654 km/h). The achievement shatters the previous land‑speed record and demonstrates that zero‑emission propulsion can compete with conventional rockets. It matters because it could reshape high‑speed transport, inspire greener engineering, and revive public interest in extreme automotive science.

Key takeaways

  • Andy Green set a new land‑speed record of 406 mph in a hydrogen‑powered car.
  • The record was verified by the FIA at the H3 test track in Wales, UK.
  • It proves that clean‑energy technology can achieve supersonic ground speeds.
  • The breakthrough may accelerate investment in hydrogen infrastructure worldwide.

Background

The quest for the fastest ground vehicle dates back to the 1930s, but the last major milestone was the 2019 record of 763 km/h set by the Bloodhound LSR—a jet‑fuel‑burning prototype. Green, who famously piloted the Thrust SSC to 763 mph in 1997, returned to the scene with a different ambition: prove that a hydrogen fuel cell could power a vehicle to supersonic speeds without carbon emissions. The H3 project, funded by a coalition of UK universities and private investors, began testing in early 2023 and benefited from advances in lightweight composites and high‑efficiency electrolyzers.

What happened

During a two‑day run‑up in May, Green completed eight timed passes, each covering the 2‑km measured section of the test track. On the final pass, the car’s onboard telemetry logged a peak speed of 406 mph, which was later corroborated by independent laser‑based speed guns and the FIA’s verification protocol. The H3’s powertrain combines a 1.2‑megawatt fuel‑cell stack with electric motors driving all four wheels, delivering instant torque while emitting only water vapor.

The event attracted a live audience of engineers, journalists, and enthusiasts, and was streamed on the Chronicle News website, where viewers could watch the moment the needle crossed the 400‑mph threshold. Analysts noted that the hydrogen system’s efficiency—about 55 %—was comparable to that of a high‑performance gasoline engine, but with a dramatically lower carbon footprint.

Why it matters

  • Environmental impact – Demonstrating a clean‑energy vehicle at supersonic speeds challenges the notion that high performance requires fossil fuels.
  • Technological spillover – The materials and control systems developed for the H3 are already being evaluated for high‑speed rail and aerospace applications.
  • Economic stimulus – The record is expected to attract further venture capital into UK hydrogen projects, potentially creating hundreds of jobs in the region.

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What happens next

The FIA has scheduled a formal certification ceremony for June 2024, after which the H3 team plans to attempt a 500 mph run later this year. Parallel to the speed trials, the consortium will publish a detailed technical paper in the Journal of Hydrogen Energy and open‑source key software modules to accelerate industry adoption. Policy makers are also expected to cite the record in upcoming discussions on the UK’s Net‑Zero strategy, potentially unlocking new subsidies for hydrogen infrastructure.

Frequently asked questions

How was the speed measured?

The FIA used a combination of GPS‑based timing loops and laser‑rangefinders positioned at the start and finish lines, ensuring an accuracy of ±0.1 mph.

Is the hydrogen used in the car renewable?

The fuel cell is supplied with green hydrogen produced via electrolysis powered by wind farms in Wales, making the entire energy chain carbon‑neutral.

Could this technology be applied to passenger cars?

While the H3 is a purpose‑built land‑speed vehicle, its core fuel‑cell system is scalable and could inform the next generation of high‑efficiency electric cars.

Bottom line

Andy Green’s 406 mph run proves that hydrogen power can break the sound barrier on land, opening a new chapter for sustainable high‑speed transport. The record underscores the UK’s leadership in clean‑tech innovation and sets the stage for even faster attempts.

Reporting by BBC News.

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