Flight tests are a big part of how NASA turns breakthrough ideas into reality. From flying humans faster than the speed of sound to proving designs that helped shape the space shuttle, flight testing transforms bold concepts into safer, more efficient technologies that benefit the public.
“Flight tests are a way to safely and effectively prove new technology, which helps certification authorities certify equipment,” said Wayne Ringelberg, chief pilot at NASA’s Armstrong Flight Research Center in Edwards, California. “It helps industry iterate and make systems better, and it promotes research in areas where new ideas can be developed.”
For nearly 80 years, teams at NASA Armstrong have used flight testing in the Southern California desert to push the limits of aerodynamics and advance aviation. Thanks to that work, NASA-developed innovations are aboard every U.S. commercial aircraft and inside every control tower today.
“The space side of NASA uses flight test, too. Every mission, like Artemis II, is never routine,” Ringelberg said. “Everything we’re doing when flying a test mission is something new or different.”
Every NASA test flight — whether it’s studying new software, hardware, or the revolutionary technology of an experimental X-plane — relies on engineers, researchers, pilots, maintenance crew, control room operators, and many others working together.
“Experienced operators and engineers evaluate how things work in flight,” Ringelberg said. “Most new technologies are designed to work in a lab or can be tested in a wind tunnel or other facility, but you never really know how they’ll perform until you fly them.”
Preflight tests often include computer analysis, simulation, wind tunnel testing, and ground tests focused on an aircraft’s ability to withstand the forces of flight and the environments through which it may fly. After hardware or software is deemed safe to fly, researchers turn the mission over to the flight test team.
To support testing, NASA Armstrong maintains an aircraft fleet modified to create space for new hardware or instruments, as well as the ability to integrate new software. These aircraft are flying laboratories, and pilots are trained to accomplish experimental missions.
For example, flight testing recently helped NASA gather critical data on laminar flow, or the smooth flow of air, over a wing. The work could lower fuel costs for future airliners. Computer modeling, wind tunnel tests, and other methods helped advance the research, but to find out even more about how the wing concept could reduce drag for future airliners, NASA used a scale model in actual flight.
NASA researchers strapped the Crossflow Attenuated Natural Laminar Flow (CATNLF) model wing to the belly of one of NASA Armstrong’s F-15s. The arrangement allowed them to collect all the information they would need without doing the extensive, costly modifications required to install a full-scale wing on an aircraft.
After a flight series is complete, engineers and researchers analyze the data. Did the instrument work as designed? Did the experimental aircraft perform safely at a high altitude? Did the software operate as planned? Each test raises its own set of questions to evaluate.
NASA continues working with academia, the Department of War, and industry partners to advance U.S. aviation through flight test and bring new benefits to the flying public.
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