SION, Switzerland and CENTENNIAL, Colo., - H55, an electric aviation pioneer born from a Solar Impulse project, has completed a series of high-density altitude, high- temperature demonstration flights in Colorado as part of its Across USA Tour. These tests confirm the real-world performance of the H55-powered Bristell B23 Energic, illustrating the operational performance of electric aviation.
The Colorado mission flights took place from an airfield situated at 5,800 feet above sea level, with temperatures reaching 36°C (96.8°F) and a takeoff density altitude of 9,500ft. The B23 Energic provided smooth, 500 feet per minute climbs using normal runway distance for departures. This 'hot and high' scenario tests an aircraft's take-off distance, climb performance, and overall efficiency. In contrast to conventional combustion engines which face degraded performance in such operating environments, the electric propulsion system of the B23 Energic delivered steady results.
Gregory Blatt, Co- Founder and Mission Director of H55, said, "Colorado offers one of the most demanding environments for aviation. This stop gives us a chance to demonstrate how electric propulsion is not only sustainable, but operationally consistent in conditions previously considered restrictive for many aircraft types. We're especially grateful to Centennial Airport and jetCenters of Colorado for their warm welcome and support. Their commitment to innovation and sustainability reflects the shared mission of accelerating the adoption of clean aviation solutions."
A First for Colorado
Centennial Flyers, a leading flight school based at Centennial Airport (KAPA), signed a Letter of Intent (LOI) during H55's Colorado stop-over, becoming the first operator in the State to formally commit to adopting electric aviation. This engagement further strengthens H55's expanding order book and underscores the market's readiness for certified electric aircraft.
Proving Electric Flight in Real Environmental Settings
Electric propulsion systems face heightened scrutiny when tested outside of controlled environments.
In Colorado's hot, high-altitude climate, H55's certified Electric Propulsion System (EPS) excels, maintaining performance despite the challenges posed by both elevated temperatures and reduced air density. The system delivered consistent climb rates and demonstrated efficient battery cooling, proving that electric flight can operate effectively in diverse climates and geographies year-round.
