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this is the largest test article ever

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built with the curved path the name of

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this project is the passive air elastic

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tailored wing we call it the Pat wing

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because it's easier to say there are

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several differences between this wing

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and a traditional wing first of all it's

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built out of composites the biggest

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difference is in the skins

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we're actually steering the composite

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fibers with this particular design we're

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trying to tailor that stiffness and so

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instead of going straight along the wing

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we're actually curving that fiber in the

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plane of the wing so that we can change

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the stiffness along the whole length

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this was one of the most heavily

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instrumented wings we've ever tested

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there was about 10,000 sensors on a wing

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which included fiber optic strain

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sensing conventional strain sensing

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displacement sensors load sensing and

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also in kilometers surface prep bonding

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wiring checkout so there's quite a bit

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to just go into it the the wing was

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fabricated by Aurora and Mississippi and

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the wing was wrought here of the last

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six months we integrated it into our

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test fixture we used a hydraulic load

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control system to apply load at seven

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stations along the wing

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pressure's up for trial

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[Music]

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the challenges when wings get longer and

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thinner they'd become more flexible and

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so the intention of this particular test

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was to try to control that flexibility

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to allow us to still build a lightweight

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wing with the structural benefits and

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enable the aerodynamic benefit

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simultaneously because this wing was

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going to see largest placements under

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load we design a special loading system

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that included both under wing loading

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and over wing loading the length of the

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wing is 39 feet and the tip is projected

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to deflect on the order of eight feet

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the testing lasted for a couple weeks

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typical positive upload tests took

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approximately an hour and that data will

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be collected and we will take that and

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analyze that over the next six months we

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hope that this will find its way into

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commercial market you know this is

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thoroughly the first step to demonstrate

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that it's not only feasible but then you

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know give us a path towards being able

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to certify the technology so that it can

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be used in commercial aircraft