Electrifying Short-Haul Aviation: Series Hybridisation as a Path to Zero-Carbon Flight

The aviation industry faces mounting pressure to cut emissions, with 2030 and 2050 targets driving urgent innovation. While sustainable aviation fuels and full electrification dominate headlines, a more practical solution is emerging: series hybridisation for short-haul routes. In this Aero-Mag article, Derek Jordanou-Bailey, Chief Engineer – Aerospace at Helix, explains how series hybrid aircraft—powered exclusively by electric motors and batteries, with an onboard fuel tank and generator for backup—can reduce fuel burn by over 70% compared to conventional aircraft on flights under 270 nautical miles.

The technical advantage lies in efficiency. Unlike parallel hybrid systems where engine and motor co-drive the aircraft, series hybrids eliminate redundant drivetrain connections and allow the fuel generator to operate within its optimal performance range. This architecture is particularly powerful for short-haul flights, which are the aviation industry’s most carbon-intensive category due to the disproportionate fuel consumption during takeoff and landing. Short-haul flights currently emit 155g of CO2 per passenger kilometre—75% higher than the industry average—making them an immediate target for decarbonisation.

However, realising these benefits requires more than technological innovation; it demands a fundamental shift in how aviation networks operate. Rather than the current hub-and-spoke model concentrating traffic at major international airports like London and Frankfurt, series hybridisation enables point-to-point travel using regional airports. This redistribution would not only slash emissions but also alleviate airport congestion and delays, translating into cost savings for airlines and improved experience for passengers.

Read the full article: Electrifying the Future – Aero-Mag, March 2026