PATW Passive Aeroelastic Tailored Wing

1. 0:16this is the largest test article ever built with the curved path the name of this project is the passive air elastic
2. 0:26tailored wing we call it the Pat wing because it's easier to say there are several differences between this wing
3. 0:38and a traditional wing first of all it's built out of composites the biggest difference is in the skins
4. 0:44we're actually steering the composite fibers with this particular design we're trying to tailor that stiffness and so
5. 0:52instead of going straight along the wing we're actually curving that fiber in the
6. 0:57plane of the wing so that we can change the stiffness along the whole length this was one of the most heavily
7. 1:05instrumented wings we've ever tested there was about 10,000 sensors on a wing which included fiber optic strain
8. 1:11sensing conventional strain sensing displacement sensors load sensing and also in kilometers surface prep bonding wiring checkout so there's quite a bit
9. 1:24to just go into it the the wing was fabricated by Aurora and Mississippi and
10. 1:28the wing was wrought here of the last six months we integrated it into our test fixture we used a hydraulic load
11. 1:35control system to apply load at seven stations along the wing pressure's up for trial
12. 2:08the challenges when wings get longer and thinner they'd become more flexible and so the intention of this particular test
13. 2:17was to try to control that flexibility to allow us to still build a lightweight wing with the structural benefits and
14. 2:26enable the aerodynamic benefit simultaneously because this wing was going to see largest placements under load we design a special loading system
15. 2:34that included both under wing loading and over wing loading the length of the
16. 2:38wing is 39 feet and the tip is projected to deflect on the order of eight feet
17. 2:45the testing lasted for a couple weeks typical positive upload tests took approximately an hour and that data will
18. 2:53be collected and we will take that and analyze that over the next six months we
19. 2:58hope that this will find its way into commercial market you know this is thoroughly the first step to demonstrate
20. 3:04that it's not only feasible but then you know give us a path towards being able
21. 3:09to certify the technology so that it can be used in commercial aircraft

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