1 00:00:00,979 --> 00:00:03,409 the frontiers of flight have been 2 00:00:03,409 --> 00:00:03,419 the frontiers of flight have been 3 00:00:03,419 --> 00:00:07,040 the frontiers of flight have been extended 4 00:00:07,040 --> 00:00:07,050 5 00:00:07,050 --> 00:00:09,290 highly experimental designs for the 6 00:00:09,290 --> 00:00:09,300 highly experimental designs for the 7 00:00:09,300 --> 00:00:10,450 highly experimental designs for the plains of the world 8 00:00:10,450 --> 00:00:10,460 plains of the world 9 00:00:10,460 --> 00:00:13,280 plains of the world this plane is the latest of the x-series 10 00:00:13,280 --> 00:00:13,290 this plane is the latest of the x-series 11 00:00:13,290 --> 00:00:17,179 this plane is the latest of the x-series an aircraft called the x-29 at first 12 00:00:17,179 --> 00:00:17,189 an aircraft called the x-29 at first 13 00:00:17,189 --> 00:00:19,640 an aircraft called the x-29 at first glance the prime seems ordinary until 14 00:00:19,640 --> 00:00:19,650 glance the prime seems ordinary until 15 00:00:19,650 --> 00:00:23,180 glance the prime seems ordinary until your perspective changes 16 00:00:23,180 --> 00:00:23,190 17 00:00:23,190 --> 00:00:25,120 bring back 18 00:00:25,120 --> 00:00:25,130 bring back 19 00:00:25,130 --> 00:00:29,690 bring back beautiful 20 00:00:29,690 --> 00:00:29,700 21 00:00:29,700 --> 00:00:32,490 through the use of the x-29 is a test 22 00:00:32,490 --> 00:00:32,500 through the use of the x-29 is a test 23 00:00:32,500 --> 00:00:34,500 through the use of the x-29 is a test vehicle engineers will be able to 24 00:00:34,500 --> 00:00:34,510 vehicle engineers will be able to 25 00:00:34,510 --> 00:00:36,750 vehicle engineers will be able to explore the forward swept wings unique 26 00:00:36,750 --> 00:00:36,760 explore the forward swept wings unique 27 00:00:36,760 --> 00:00:39,870 explore the forward swept wings unique mixture of speed agility and slow flying 28 00:00:39,870 --> 00:00:39,880 mixture of speed agility and slow flying 29 00:00:39,880 --> 00:00:42,660 mixture of speed agility and slow flying qualities they will also explore the 30 00:00:42,660 --> 00:00:42,670 qualities they will also explore the 31 00:00:42,670 --> 00:00:44,400 qualities they will also explore the interaction of the wings with the 32 00:00:44,400 --> 00:00:44,410 interaction of the wings with the 33 00:00:44,410 --> 00:00:46,979 interaction of the wings with the forward canards and rear straight flaps 34 00:00:46,979 --> 00:00:46,989 forward canards and rear straight flaps 35 00:00:46,989 --> 00:00:50,370 forward canards and rear straight flaps in this design all control surfaces are 36 00:00:50,370 --> 00:00:50,380 in this design all control surfaces are 37 00:00:50,380 --> 00:00:52,190 in this design all control surfaces are linked together by computer 38 00:00:52,190 --> 00:00:52,200 linked together by computer 39 00:00:52,200 --> 00:00:55,140 linked together by computer Walter sepak NASA's program manager for 40 00:00:55,140 --> 00:00:55,150 Walter sepak NASA's program manager for 41 00:00:55,150 --> 00:00:59,610 Walter sepak NASA's program manager for the x-29 all three of these surfaces are 42 00:00:59,610 --> 00:00:59,620 the x-29 all three of these surfaces are 43 00:00:59,620 --> 00:01:04,700 the x-29 all three of these surfaces are tied into a digital computer and their 44 00:01:04,700 --> 00:01:04,710 tied into a digital computer and their 45 00:01:04,710 --> 00:01:07,860 tied into a digital computer and their deflection or movement during flight is 46 00:01:07,860 --> 00:01:07,870 deflection or movement during flight is 47 00:01:07,870 --> 00:01:10,530 deflection or movement during flight is optimized by the flight control 48 00:01:10,530 --> 00:01:10,540 optimized by the flight control 49 00:01:10,540 --> 00:01:13,140 optimized by the flight control computers when the pilot makes a stick 50 00:01:13,140 --> 00:01:13,150 computers when the pilot makes a stick 51 00:01:13,150 --> 00:01:15,600 computers when the pilot makes a stick input to the airplane these three 52 00:01:15,600 --> 00:01:15,610 input to the airplane these three 53 00:01:15,610 --> 00:01:18,300 input to the airplane these three surfaces all right react simultaneously 54 00:01:18,300 --> 00:01:18,310 surfaces all right react simultaneously 55 00:01:18,310 --> 00:01:20,460 surfaces all right react simultaneously to give the optimal response of the 56 00:01:20,460 --> 00:01:20,470 to give the optimal response of the 57 00:01:20,470 --> 00:01:23,490 to give the optimal response of the airplane to minimize drag and maximize 58 00:01:23,490 --> 00:01:23,500 airplane to minimize drag and maximize 59 00:01:23,500 --> 00:01:26,100 airplane to minimize drag and maximize performance the forward swept wing 60 00:01:26,100 --> 00:01:26,110 performance the forward swept wing 61 00:01:26,110 --> 00:01:28,230 performance the forward swept wing concept was first explored during World 62 00:01:28,230 --> 00:01:28,240 concept was first explored during World 63 00:01:28,240 --> 00:01:30,510 concept was first explored during World War two when the Germans built a test 64 00:01:30,510 --> 00:01:30,520 War two when the Germans built a test 65 00:01:30,520 --> 00:01:33,090 War two when the Germans built a test bomber with 15 degree forward swept 66 00:01:33,090 --> 00:01:33,100 bomber with 15 degree forward swept 67 00:01:33,100 --> 00:01:36,120 bomber with 15 degree forward swept wings the bomber had a limitation which 68 00:01:36,120 --> 00:01:36,130 wings the bomber had a limitation which 69 00:01:36,130 --> 00:01:38,280 wings the bomber had a limitation which is inherent to all forward swept wings 70 00:01:38,280 --> 00:01:38,290 is inherent to all forward swept wings 71 00:01:38,290 --> 00:01:41,340 is inherent to all forward swept wings it is called structural divergence and 72 00:01:41,340 --> 00:01:41,350 it is called structural divergence and 73 00:01:41,350 --> 00:01:44,130 it is called structural divergence and is illustrated here as soon as higher 74 00:01:44,130 --> 00:01:44,140 is illustrated here as soon as higher 75 00:01:44,140 --> 00:01:46,290 is illustrated here as soon as higher speeds are realized the wingtips 76 00:01:46,290 --> 00:01:46,300 speeds are realized the wingtips 77 00:01:46,300 --> 00:01:47,580 speeds are realized the wingtips experience tremendous 78 00:01:47,580 --> 00:01:47,590 experience tremendous 79 00:01:47,590 --> 00:01:50,190 experience tremendous twisting loads which flex the wings and 80 00:01:50,190 --> 00:01:50,200 twisting loads which flex the wings and 81 00:01:50,200 --> 00:01:53,610 twisting loads which flex the wings and can literally tear them off the x-29 82 00:01:53,610 --> 00:01:53,620 can literally tear them off the x-29 83 00:01:53,620 --> 00:01:56,490 can literally tear them off the x-29 swing is criss-crossed with 750 84 00:01:56,490 --> 00:01:56,500 swing is criss-crossed with 750 85 00:01:56,500 --> 00:01:58,950 swing is criss-crossed with 750 composite tapes of such material as 86 00:01:58,950 --> 00:01:58,960 composite tapes of such material as 87 00:01:58,960 --> 00:02:02,790 composite tapes of such material as carbon Kevlar and glass the materials 88 00:02:02,790 --> 00:02:02,800 carbon Kevlar and glass the materials 89 00:02:02,800 --> 00:02:04,920 carbon Kevlar and glass the materials are woven in a way to counteract the 90 00:02:04,920 --> 00:02:04,930 are woven in a way to counteract the 91 00:02:04,930 --> 00:02:07,260 are woven in a way to counteract the twisting forces encountered by the wing 92 00:02:07,260 --> 00:02:07,270 twisting forces encountered by the wing 93 00:02:07,270 --> 00:02:13,870 twisting forces encountered by the wing at transonic and subsonic speeds 94 00:02:13,870 --> 00:02:13,880 95 00:02:13,880 --> 00:02:15,520 is to prove the benefits of the 96 00:02:15,520 --> 00:02:15,530 is to prove the benefits of the 97 00:02:15,530 --> 00:02:19,350 is to prove the benefits of the forward-swept wing to confirm the x-29 98 00:02:19,350 --> 00:02:19,360 forward-swept wing to confirm the x-29 99 00:02:19,360 --> 00:02:22,410 forward-swept wing to confirm the x-29 and when these goals are accomplished to 100 00:02:22,410 --> 00:02:22,420 and when these goals are accomplished to 101 00:02:22,420 --> 00:02:24,510 and when these goals are accomplished to make sure the results are transferred to 102 00:02:24,510 --> 00:02:24,520 make sure the results are transferred to 103 00:02:24,520 --> 00:02:27,840 make sure the results are transferred to government and industry what we learned 104 00:02:27,840 --> 00:02:27,850 government and industry what we learned 105 00:02:27,850 --> 00:02:29,970 government and industry what we learned this program will help build the next 106 00:02:29,970 --> 00:02:29,980 this program will help build the next 107 00:02:29,980 --> 00:02:32,250 this program will help build the next generation of fighter and commercial 108 00:02:32,250 --> 00:02:32,260 generation of fighter and commercial 109 00:02:32,260 --> 00:02:33,320 generation of fighter and commercial ever 110 00:02:33,320 --> 00:02:33,330 ever 111 00:02:33,330 --> 00:02:35,390 ever you