Rolls-Royce celebrates with Warwick Uni and Electroflight on all-electric aircraft flight record

The all-electric ‘Spirit of Innovation’ aircraft, developed by Rolls-Royce and supported by Cheltenham-based aviation energy storage specialist Electroflight and a team at WMG, University of Warwick, is officially the world’s fastest all-electric aircraft, having set two new world records which have now been independently confirmed. At 15.45 (GMT) on 16 November 2021, the aircraft reached a top speed of 555.9 km/h (345.4 mph) over 3 kilometres, smashing the existing record by 213.04 km/h (132mph).

In further runs at the UK Ministry of Defence’s Boscombe Down experimental aircraft testing site, the aircraft achieved 532.1km/h (330 mph) over 15 kilometres – 292.8km/h (182 mph) faster than the previous record.

Both records have been officially verified by the Fédération Aéronautique Internationale (FAI), the World Air Sports Federation that controls and certifies world aeronautical and astronautical records. During its record-breaking runs, the aircraft, which is part of the UK Government-backed ACCEL or ‘Accelerating the Electrification of Flight’ project, also clocked up a maximum top speed of 623km/h (387.4mph) making it the world’s fastest all-electric vehicle.

Using  facilities at WMG’s Energy Innovation Centre, researchers at WMG supported the team through the development process, conducting extensive electrical, thermal, safety, and vibration & shock testing. This was delivered all the way from Electroflight’s initial single lithium-ion cell selection through to the battery module and finally the battery pack for a full propulsion battery system.

Testing included cell selection, fire protection system design, module level thermal management, system testing and pack level testing, and also included sub-powertrain testing of the battery system and electric machines connected together.

Individual components such as the battery casing materials, individual lithium-ion cells, cell clusters and sub-modules were all examined in WMG’s battery testing laboratories including the Battery Abuse Testing Centre. Aerospace DO-160G shock and vibration testing was performed in WMG’s battery vibration facility – the first time an aircraft propulsion battery has successfully completed DO-160G testing in the UK.

Chief Engineer Mark Amor-Segan, from WMG, University of Warwick, said: “It’s incredibly exciting to see Rolls-Royce’s ‘Spirit of Innovation’ be awarded two new world records and officially be titled the World’s fastest all-electric aircraft. It has been a tremendous journey to share with Electroflight, to help verify and validate the battery system end-to-end and help create the most power-dense propulsion battery ever for Aerospace.

“We have worked closely with Electroflight and Rolls-Royce throughout this process, cementing new collaborative relationships and helping achieve world-class pioneering technology. To see it progress from literally a single cell into a full-scale battery system and a world-record breaking flight, is tribute to the incredible dedication and capability of the whole team at ACCEL. This project has played a very important part in our work in Aerospace, and we’re excited to continue our research into electrification and the future of sustainable flight.”

Douglas Campbell, Technical Director of Electroflight said: “This has been a landmark project for our company and our industry – one which opens up a world of possibilities in the electrification of aviation. We’re thrilled to have played such an important part in this success and grateful to our partners at WMG for their support throughout this endeavour.”

Customer Director Matheu Parr from Rolls-Royce added: “The support we received from Warwick Manufacturing Group to develop the battery technology that would power the world’s fastest all-electric aircraft was critical for the team’s record-breaking triumphs. Rolls-Royce has a long-standing relationship with WMG to ensure we are the forefront of technology and we will build on this capability to deliver propulsion and power systems for the advanced air mobility market.”