Though the battery pack can be topped up over any AC outlet, no special infrastructure needed, fast-charging is also supported for up to 80% capacity in under 15 minutes. The aircraft also recovers energy in flight through wing-mounted solar panels and a regenerative system that spins the propeller as a wind turbine during glides and descents. "Regenerative flight can significantly extend the aircraft's range," Iturmendi said after the test flights.
The Helios Horizon itself started life as a Pipistrel Taurus motorized glider. Iturmendi's team added proprietary battery management, a custom propulsion stack, thermodynamic controls, and solar panel wing extensions. The aircraft already holds the world altitude record for electric planes in its weight class, having reached 24,000 ft (7,315 m). The next goal is 40,000 ft (12,192 m), commercial cruising altitude, in stratospheric flights planned for later this year.
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