Airbus tests A321neo wing extensions

Airbus said on July 21 that it has begun a new phase of its Wing of Tomorrow research program, using an A321neo as a flying testbed for full-scale wing extensions aimed at future single-aisle aircraft. The company said the three-year campaign will study how higher-span wing geometries behave in real flight conditions rather than only in simulations or wind tunnels. (airbus.com) Airbus said the extensions, each several meters long, will replicate a folding wing in the fully extended position during flight. The work is part of Airbus’s effort to evaluate longer, lighter and more slender wings as one of the main routes to lower fuel burn on a future narrowbody. (ainonline.com) ### Why is Airbus using an A321neo for this test? The A321neo is the aircraft Airbus chose to carry the experimental extensions because it lets the company test full-scale hardware in a representative flying environment, Airbus said. (airbus.com) Over the next three years, the company will design, build and fly several wing-extension configurations on the jet to compare how different geometries perform. Richard MacPherson, an Airbus technology project lead, told reporters at the Farnborough Airshow that the devices are intended to replace the upward-curving Sharklet wingtips used on the A320 family. He said the flight campaign will measure the aerodynamic qualities and performance benefits of longer wings and feed those results into future narrowbody design decisions. (airbus.com) ### What exactly are the extensions meant to simulate? The extensions are designed to simulate a folding wing that is latched and fully locked in its flight position, MacPherson said. Airbus said the hardware will carry extensive instrumentation so engineers can record how the longer span affects handling and behavior in flight. (airbus.com) Airbus said it is separately studying the mechanism that could allow a future wing to fold on the ground. MacPherson said the company has already validated early concepts through digital simulation and carried out intensive wind-tunnel testing to evaluate and optimize different variants before the flight phase. (ainonline.com) ### What problem is Airbus trying to solve with longer wings? Sue Partridge, Airbus head of the Wing of Tomorrow program, said the wing is “one of the biggest levers” available to improve aircraft efficiency. Airbus said the program is centered on creating longer, lighter and more slender wings to maximize aerodynamic efficiency and reduce fuel burn on the next generation of single-aisle aircraft. (airbus.com) MacPherson said wing technology has the potential to deliver efficiency gains comparable to, or greater than, those from next-generation engines. The practical question Airbus is testing is whether a larger effective span can be used in flight while preserving airport compatibility through some form of folding or deployable geometry on the ground, according to Airbus’s description of the demonstrator and the company’s Farnborough briefing. (airbus.com) ### How far along is Wing of Tomorrow already? Airbus said it has already built three 17-meter ground-based wing demonstrators under the program and used them to explore increased wingspan and more than 100 manufacturing and assembly technologies. The company said Wing of Tomorrow has received 227 million pounds of backing since 2014 through the U.K. (airbus.com) Aerospace Technology Institute program, which includes the ATI, the Department for Business and Trade and Innovate UK. AIN reported on July 22 that Airbus expects the first experimental folding-wing hardware to enter assembly soon and hopes to begin flight testing on the A321neo in the second half of 2027. Aviation Week reported that the broader test effort runs through 2029. (ainonline.com) ### Where does the program go next? Airbus said the wing extensions will be assembled at its Wing Technology Development Centre in Filton, England, before flight testing in Toulouse, France. The company said the data from those flights will be used to de-risk longer-wing concepts for its next-generation single-aisle studies. Airbus said on March 25, 2025 that its teams were working toward key decisions on engine type, wing design and other innovations for a next-generation single-aisle aircraft once the technologies reach maturity. (airbus.com) The A321neo extension campaign is now one of the named flight-test steps in that process. (airbus.com) (ainonline.com)