390 Electric Airplane Test Flight: Max Trescott Reviews the Bristell B23 Energic

Max Trescott takes listeners inside the cockpit of the future in episode 390, as he shares his firsthand experience flying the fully electric Bristell B23 Energic trainer and talks with executives from H55, the Swiss company behind its electric propulsion system. This in-depth episode explores the technical, operational, and strategic aspects of electric flight training aircraft.

The B23 Energic is a joint project between Czech aircraft manufacturer BRM Aero and H55, the latter founded by the team behind the Solar Impulse aircraft that flew around the world on solar power. Max discusses how H55 is focusing on producing electric propulsion systems—batteries, controllers, and motors—for aircraft manufacturers, rather than building entire aircraft themselves. This modular approach is designed to speed up certification and lower development costs.

H55 CEO Martin Larose shares how the company is involved in several projects worldwide, including with CAE to retrofit Piper Archers, Harbour Air to electrify floatplanes, and Pratt & Whitney on a hybrid Dash 8-400. He also explains H55’s plan to manufacture battery systems in both Switzerland and Montreal to serve global markets while avoiding costly and complex battery transport logistics.

Max’s test flight takes place at Palo Alto Airport, where the B23 Energic was on a U.S. tour. He notes the aircraft’s similarities to the Piper Sport Cruiser in handling and design, due to a shared designer. The electric version offers about 60 minutes of flight time and a 10-minute reserve, although U.S. FAA rules would require a 30-minute reserve, limiting U.S. endurance to 40 minutes unless additional batteries are added.

The aircraft uses NCA lithium-ion batteries and features a liquid-cooled motor and controller, but air-cooled batteries to keep things simple. While the plane’s payload is about 73 pounds less than its piston counterpart, it offers dramatically lower operating costs—estimated at $8–9 per hour for electricity versus $50+ per hour in fuel and oil for conventional trainers.

The certification process, especially in Europe under EASA, remains H55’s biggest challenge, with 90% of company resources dedicated to achieving approval. The motor is built by Equipmake in the UK to H55’s design and features dual windings for redundancy—ensuring safe single-failure tolerance.

Max also interviews Laurent, the demo pilot, and Céline, a project engineer, learning about how H55 built hundreds of hours of bench testing before the aircraft even flew. Their insights underscore the care and rigorous engineering that go into preparing electric aircraft for real-world flight training environments.

In-flight, Max describes the aircraft as well-balanced and intuitive, with a quiet cabin that enhances concentration—an important advantage for student pilots. He praises the center stick control, wide cabin, and visibility. The landing was smooth and predictable, and energy use during the short flight was minimal—about 6 kWh for a pattern and 360 turn.

Finally, Max reflects on how quickly the electric nature of the aircraft faded into the background during flight—exactly what H55 wants. The B23 Energic is expected to launch in Europe in 2026 and U.S. in 2027, with a price of $431,000 for early buyers and $500,000 later. It will be certified for Day VFR only, making it a strong candidate for cost-effective flight training.

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