technology
Swiss Solar Plane Sets New Altitude Record at 9,521 Meters
SolarStratos aircraft achieves highest solar-electric flight record above Switzerland, surpassing previous Solar Impulse milestone.

Record-Breaking Achievement
In a groundbreaking achievement for Swiss aviation and renewable energy technology, the SolarStratos aircraft has set a new world altitude record for solar-powered flight. Pilot Raphaël Domjan successfully piloted the aircraft to an impressive altitude of 9,521 meters above Switzerland, surpassing the previous record held by Solar Impulse by nearly 300 meters. The historic flight, which took place from Sion airport in southern Switzerland, represents a significant milestone in solar aviation history.
Flight Details and Technical Specifications
The record-setting flight lasted 5 hours and 9 minutes, departing from Sion airport in the Valais region. The HB-SXA experimental aircraft utilized both solar power and natural thermals provided by the local topography to achieve its remarkable altitude. The achievement is pending official validation from the Fédération Internationale d'Aviation (FAI). The flight demonstrated the impressive capabilities of solar-electric aviation technology and the aircraft's ability to operate efficiently at high altitudes.
Historical Context and Project Background
The SolarStratos project, launched in 2015, emerged from Switzerland's rich tradition of solar aviation innovation. The initiative was inspired by the success of the PlanetSolar Foundation's solar catamaran, which completed a world-first circumnavigation in 2012. This latest achievement builds upon Switzerland's pioneering role in solar aviation, following the legacy of the Solar Impulse project, which previously held the altitude record at 9,235 meters.
Environmental Impact and Future Implications
This achievement demonstrates the vast potential of solar-powered aviation in reducing the environmental impact of air travel. The SolarStratos team emphasizes that this record is more than just a technical achievement - it serves as a powerful symbol for the future of sustainable aviation. The project aims to inspire further development in solar technology and showcase Switzerland's commitment to environmental innovation. With their sights set on reaching the stratosphere using only solar power, the team continues to push the boundaries of what's possible in clean energy aviation.