WEBVTT

1
00:00:15.650 --> 00:00:28.710
this is the largest test article ever built with the curved path the name of this project is the passive air elastic

2
00:00:26.340 --> 00:00:40.080
tailored wing we call it the Pat wing because it's easier to say there are several differences between this wing

3
00:00:37.950 --> 00:00:46.170
and a traditional wing first of all it's built out of composites the biggest difference is in the skins

4
00:00:43.680 --> 00:00:54.180
we're actually steering the composite fibers with this particular design we're trying to tailor that stiffness and so

5
00:00:51.870 --> 00:00:58.620
instead of going straight along the wing we're actually curving that fiber in the

6
00:00:56.550 --> 00:01:07.050
plane of the wing so that we can change the stiffness along the whole length this was one of the most heavily

7
00:01:05.220 --> 00:01:13.070
instrumented wings we've ever tested there was about 10,000 sensors on a wing which included fiber optic strain

8
00:01:11.070 --> 00:01:25.560
sensing conventional strain sensing displacement sensors load sensing and also in kilometers surface prep bonding wiring checkout so there's quite a bit

9
00:01:23.670 --> 00:01:30.660
to just go into it the the wing was fabricated by Aurora and Mississippi and

10
00:01:28.320 --> 00:01:38.400
the wing was wrought here of the last six months we integrated it into our test fixture we used a hydraulic load

11
00:01:34.980 --> 00:01:49.480
control system to apply load at seven stations along the wing pressure's up for trial

12
00:02:07.970 --> 00:02:19.620
the challenges when wings get longer and thinner they'd become more flexible and so the intention of this particular test

13
00:02:17.340 --> 00:02:26.940
was to try to control that flexibility to allow us to still build a lightweight wing with the structural benefits and

14
00:02:25.500 --> 00:02:36.030
enable the aerodynamic benefit simultaneously because this wing was going to see largest placements under load we design a special loading system

15
00:02:33.870 --> 00:02:41.790
that included both under wing loading and over wing loading the length of the

16
00:02:38.400 --> 00:02:48.060
wing is 39 feet and the tip is projected to deflect on the order of eight feet

17
00:02:45.140 --> 00:02:55.680
the testing lasted for a couple weeks typical positive upload tests took approximately an hour and that data will

18
00:02:53.340 --> 00:03:00.360
be collected and we will take that and analyze that over the next six months we

19
00:02:58.440 --> 00:03:06.870
hope that this will find its way into commercial market you know this is thoroughly the first step to demonstrate

20
00:03:04.380 --> 00:03:11.160
that it's not only feasible but then you know give us a path towards being able

21
00:03:09.030 --> 00:03:14.390
to certify the technology so that it can be used in commercial aircraft