Airbus Validates Wake Energy Retrieval in Transatlantic Flight Trials

This article is based on an official press release from Airbus and the SESAR Joint Undertaking.

Airbus and Partners Validate “Wake Energy Retrieval” Operations in Transatlantic Trials

On February 25, 2026, Airbus and a consortium of airline and air traffic management partners announced significant progress in the effort to reduce aviation emissions through biomimicry. The GEESE (Gain Environmental Efficiency by Saving Energy) project has successfully validated the operational procedures required for Wake Energy Retrieval (WER), a technique designed to save up to 5% in fuel consumption on long-haul flights.

According to the official announcement from Airbus, the milestones were achieved during a series of transatlantic flight trials conducted in late 2025. These trials demonstrated that commercial aircraft can be reliably paired in mid-flight to fly in formation, mimicking the energy-saving V-formation used by migrating geese. The project focuses specifically on the Air Traffic Management (ATM) challenges of coordinating such maneuvers without disrupting standard airspace operations.

The successful validation of these procedures marks a critical step toward commercial deployment, proving that existing navigation technology and new coordination tools can bring two independent aircraft to a precise rendezvous point in the middle of the ocean.

Trial Results: Precision and Potential Savings

The recent trials involved eight specific flights over the North Atlantic, designed to test the feasibility of guiding two aircraft from different departure points to a single geographic location at the exact same time. Airbus reports that the trials achieved a 75% success rate, with the aircraft reaching their designated rendezvous positions as scheduled.

While these specific trials maintained vertical separation, meaning the aircraft flew at different altitudes for safety reasons, data analysis projected the efficiency gains that would have occurred had the aircraft engaged in actual formation flying.

“Data analysis revealed that if the six successful pairings had engaged in actual Wake Energy Retrieval… they would have saved a total of 12 tonnes of fuel.”

This equates to approximately 2 tonnes of fuel saved per flight. The concept relies on a “follower” aircraft positioning itself approximately 1.5 to 2 nautical miles (3 km) behind a “leader” aircraft. In this position, the follower rides the smooth updraft of air, or wake, created by the leader, generating “free lift” that allows the trailing aircraft to reduce engine thrust.

The Four-Step Coordination Process

A primary goal of the GEESE project is to establish a safe, repeatable process for Air Traffic Control (ATC) and airlines to manage these pairings. The trials validated a four-step operational workflow:

1. Trajectory Computation: The Airbus Pairing Assistance Tool (PAT) calculates optimized flight paths and rendezvous instructions in real-time.
2. Operational Assessment: Dispatchers, flight crews, and ATC centers review the proposed trajectories to ensure they meet all safety and operational standards.
3. Visibility & Monitoring: A dedicated interface at the EUROCONTROL Innovation Hub allows all stakeholders to monitor the status of the pairing decision.
4. Commitment: Flight crews activate a cockpit function to “commit” to the rendezvous, adjusting speeds to ensure simultaneous arrival at the meeting point.

This process confirmed that the Pairing Assistance Tool (PAT) can effectively guide aircraft to a merge point while maintaining standard safety protocols.

AirPro News Analysis

The GEESE project represents a shift in how the aviation industry approaches efficiency. Historically, fuel savings have been driven by hardware improvements, lighter materials and more efficient engines. Wake Energy Retrieval, however, is a software and operations-driven solution.

Achieving a 5% reduction in fuel burn without modifying the airframe or engines is substantial. For context, a typical engine upgrade on a widebody aircraft might yield a 10-15% improvement but requires billions in development and years of certification. A 5% gain purely through formation flying offers a complementary “operational upgrade” that could be deployed alongside new engine technologies. The challenge remains regulatory: moving from vertically separated trials to actual close-formation flying (1.5nm separation) will require rigorous safety cases to satisfy global aviation authorities.

Project Background and Partners

The GEESE project is an evolution of Airbus’s earlier “fello’fly” demonstrator, which focused on the aerodynamics and flight control systems required for formation flying. GEESE expands this scope to address the logistical challenge of integrating these formations into global air traffic.

The collaboration involves a wide range of industry stakeholders, including:

• Lead: Airbus
• Airlines: Air France, Delta Air Lines, French bee, Virgin Atlantic
• Air Navigation Service Providers (ANSPs): AirNav Ireland, DSNA (France), NATS (UK), EUROCONTROL
• Technology Partners: Indra, ENAC, CIRA, DLR, Frequentis, Boeing

Airbus has stated that the project targets full commercial deployment by the mid-next decade. The next phase of development will focus on regulatory approval to allow aircraft to fly at the same altitude with reduced separation, a prerequisite for realizing the fuel savings demonstrated in the simulations.

Sources: Airbus | SESAR Joint Undertaking