NASA researchers have been pushing the boundaries of wing design, testing a new 15-foot model to find its structural limits. The focus is on developing technologies for future ultra-efficient aircraft, with the potential to save fuel and reduce emissions. The wing design, known as the Structural Wing Experiment Evaluating Truss-bracing (SWEET-15), incorporates a long wing supported by an aerodynamic strut.
The research team has been working to understand how the new wing design behaves under the kinds of forces experienced in flight. To do this, they have been conducting a series of tests, including bending the wing in the Flight Loads Laboratory at NASA’s Armstrong Flight Research Center.
Wing Design and Testing
The SWEET-15 design originated from combining five different advanced composite manufacturing and assembly technologies. The 15-foot-long test article was designed and fabricated at NASA’s Langley Research Center in Hampton, Virginia, before traveling to NASA’s Armstrong Flight Research Center in Edwards, California, for testing.
Over several months, NASA engineers intentionally bent the test wing, using numerous strain and load sensors to track how the wing responded as forces increased. The data from the sensors confirmed the predictions made by NASA’s computer models, providing the team with confidence in the new manufacturing approaches and methods for connecting wing parts used in SWEET-15.
Key Findings and Implications
The test concluded with a deliberate test-to-failure, where engineers increased loads beyond the wing’s design limits to determine how and where it would fail. The structure ultimately failed at roughly 127% of its design limit load, with visible damage appearing near the back edge of the wing and in the upper wing cover.
This element of testing provided valuable insight into how the joints connecting the wing to its main strut and a secondary one, called a jury strut, behave under forces beyond the expected flight envelope. The results have significant implications for the development of future ultra-efficient aircraft, with the potential to reduce fuel consumption and emissions.
Future Directions and Applications
The successful testing of the SWEET-15 model marks a milestone in NASA’s aeronautics research. The work is being conducted through NASA’s Subsonic Flight Demonstrator project, with the goal of developing more efficient aviation technologies. The research team will now analyze the data collected during testing to inform future airframe designs and support NASA’s ongoing efforts to develop more efficient aircraft.
- Advanced composite manufacturing and assembly technologies
- Ultra-efficient aircraft designs
- Reduced fuel consumption and emissions
- Improved aircraft performance and safety
Conclusion and Next Steps
The wing design test has provided valuable insights into the potential for ultra-efficient aircraft. As the research team continues to analyze the data and develop new technologies, the future of aviation looks promising. With the potential to reduce fuel consumption and emissions, the new wing design could have a significant impact on the environment and the aviation industry as a whole.
Source: nasa.gov.
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