Delta to Retrofit 240 Boeing 737NG Aircraft with Aerodynamic Finlets

The decision follows extensive technical collaboration between the two companies, involving flight test validations and computational fluid dynamics analysis to measure performance gains on the 737NG platform. These finlets, small aerodynamic devices installed on the rear fuselage, mitigate flow separation and stabilize pressure distribution, directly addressing the primary sources of drag in cruise flight.

For Delta, the move serves as a practical lever to lower the carbon footprint of its operations. With jet fuel consumption accounting for approximately 90% of the airline’s total carbon emissions, the modification is a key component of its broader environmental strategy. Amelia DeLuca, Delta’s Chief Sustainability Officer, noted that the partnership reflects a focus on innovations that generate tangible long-term operational benefits alongside environmental improvements.

Gil Morgan, CEO of Vortex Control Technologies, characterized the agreement as a milestone for the Seattle-based firm. The company’s technology has previously been deployed to reduce fuel consumption and prevent over 100,000 metric tons of CO₂ emissions across various commercial and military fleets. By integrating these modifications, Delta aims to improve the operating economics of its 737 fleet while maintaining its commitment to fleet-wide efficiency standards.