Imagine a future where airplanes fly like migrating geese, conserving fuel and reducing emissions. Airbus, along with partners like Air France, Delta Air Lines, and Virgin Atlantic, has just taken a significant step towards making this a reality!
In December 2025, Airbus announced the successful completion of a new phase of trials for its 'fello’fly' project. This innovative initiative, inspired by the efficiency of geese flying in formation, aims to reduce fuel consumption by pairing flights. The concept, known as 'wake energy retrieval,' involves one aircraft creating an 'uplift' that helps the following aircraft save fuel. The potential fuel savings on long-haul flights could be as high as 5% once fully operational – a significant step towards greener aviation.
The recent trials, conducted over the North Atlantic Ocean between September and October 2025, were part of the SESAR Joint Undertaking GEESE project. The primary goal was to demonstrate the feasibility and safety of guiding two aircraft to meet at a specific time and location (a 'rendezvous process') while adhering to air traffic regulations and maintaining vertical separation. Although actual wake energy retrieval wasn't tested on commercial flights during these trials, the successful completion of the rendezvous process is a critical milestone.
These trials required close coordination among various stakeholders, including the ground operational control centers of the participating airlines, four air traffic control centers, and two flight crews. The collaboration of AirNav Ireland, Air France, Delta Air Lines, DSNA, EUROCONTROL Network Manager, French bee, NATS, and Virgin Atlantic, using the EUROCONTROL Innovation hub interface, was crucial in proving the concept's safety and practicality.
But here's where it gets interesting: the process involves a sophisticated, four-step approach:
- The Airbus Pairing Assistance Tool (PAT) calculates new aircraft trajectories and shares rendezvous instructions in real-time.
- Airlines' dispatchers, flight crews, and Air Traffic Control (ATC) assess the new trajectories to ensure they're operationally sound. The EUROCONTROL Innovation Hub interface provides all stakeholders with real-time visibility of the decision status.
- One of the participating flights adjusts its planned route to join the other.
- Both flight crews activate a cockpit function, ensuring the aircraft arrive at the designated meeting point at a precisely predetermined time.
Launched in 2019, fello’fly is a project rooted in biomimicry. The GEESE project, supported by SESAR’s Digital European Sky program, was launched in 2023 to facilitate collaboration and testing in air traffic management. Additional partners include Bulatsa, Indra, ENAC, CIRA, Boeing, Frequentis, UAB, Oro Navigacija, DLR, UCLouvain, and WaPT.
This project represents a significant step towards more sustainable aviation. Do you think this approach is the future of air travel? What other innovative solutions could further reduce the environmental impact of flying? Share your thoughts in the comments!
