1 00:00:23,359 --> 00:00:24,390 the ability to 2 00:00:24,390 --> 00:00:24,400 the ability to 3 00:00:24,400 --> 00:00:27,029 the ability to take off in a short distance and land in 4 00:00:27,029 --> 00:00:27,039 take off in a short distance and land in 5 00:00:27,039 --> 00:00:28,390 take off in a short distance and land in a short distance 6 00:00:28,390 --> 00:00:28,400 a short distance 7 00:00:28,400 --> 00:00:31,349 a short distance or vertically is something aeronautical 8 00:00:31,349 --> 00:00:31,359 or vertically is something aeronautical 9 00:00:31,359 --> 00:00:33,670 or vertically is something aeronautical engineers have strived towards 10 00:00:33,670 --> 00:00:33,680 engineers have strived towards 11 00:00:33,680 --> 00:00:36,870 engineers have strived towards since world war two early attempts at 12 00:00:36,870 --> 00:00:36,880 since world war two early attempts at 13 00:00:36,880 --> 00:00:37,190 since world war two early attempts at this 14 00:00:37,190 --> 00:00:37,200 this 15 00:00:37,200 --> 00:00:41,030 this include the autogyro the helicopter 16 00:00:41,030 --> 00:00:41,040 include the autogyro the helicopter 17 00:00:41,040 --> 00:00:45,910 include the autogyro the helicopter the vertiget and other research aircraft 18 00:00:45,910 --> 00:00:45,920 the vertiget and other research aircraft 19 00:00:45,920 --> 00:00:48,869 the vertiget and other research aircraft today we have machines like the v-22 20 00:00:48,869 --> 00:00:48,879 today we have machines like the v-22 21 00:00:48,879 --> 00:00:50,150 today we have machines like the v-22 osprey 22 00:00:50,150 --> 00:00:50,160 osprey 23 00:00:50,160 --> 00:00:53,270 osprey a tilt rotor aircraft 24 00:00:53,270 --> 00:00:53,280 a tilt rotor aircraft 25 00:00:53,280 --> 00:00:56,150 a tilt rotor aircraft the quiet short-haul research aircraft 26 00:00:56,150 --> 00:00:56,160 the quiet short-haul research aircraft 27 00:00:56,160 --> 00:00:56,830 the quiet short-haul research aircraft or 28 00:00:56,830 --> 00:00:56,840 or 29 00:00:56,840 --> 00:00:59,670 or qsra and the rotor system 30 00:00:59,670 --> 00:00:59,680 qsra and the rotor system 31 00:00:59,680 --> 00:01:03,029 qsra and the rotor system research aircraft or rsra 32 00:01:03,029 --> 00:01:03,039 research aircraft or rsra 33 00:01:03,039 --> 00:01:05,429 research aircraft or rsra which are in flight testing programs at 34 00:01:05,429 --> 00:01:05,439 which are in flight testing programs at 35 00:01:05,439 --> 00:01:06,710 which are in flight testing programs at other nasa centers 36 00:01:06,710 --> 00:01:06,720 other nasa centers 37 00:01:06,720 --> 00:01:09,670 other nasa centers in the united states there is one 38 00:01:09,670 --> 00:01:09,680 in the united states there is one 39 00:01:09,680 --> 00:01:11,990 in the united states there is one aircraft currently being used that is a 40 00:01:11,990 --> 00:01:12,000 aircraft currently being used that is a 41 00:01:12,000 --> 00:01:12,469 aircraft currently being used that is a true 42 00:01:12,469 --> 00:01:12,479 true 43 00:01:12,479 --> 00:01:15,350 true stovl type aircraft it is the british 44 00:01:15,350 --> 00:01:15,360 stovl type aircraft it is the british 45 00:01:15,360 --> 00:01:16,469 stovl type aircraft it is the british made harrier 46 00:01:16,469 --> 00:01:16,479 made harrier 47 00:01:16,479 --> 00:01:19,429 made harrier jump jet this plane is manufactured in 48 00:01:19,429 --> 00:01:19,439 jump jet this plane is manufactured in 49 00:01:19,439 --> 00:01:20,469 jump jet this plane is manufactured in the united states 50 00:01:20,469 --> 00:01:20,479 the united states 51 00:01:20,479 --> 00:01:23,270 the united states by mcdonnell douglas under license as 52 00:01:23,270 --> 00:01:23,280 by mcdonnell douglas under license as 53 00:01:23,280 --> 00:01:25,270 by mcdonnell douglas under license as the av-8a 54 00:01:25,270 --> 00:01:25,280 the av-8a 55 00:01:25,280 --> 00:01:29,429 the av-8a and av8b here at lewis research center 56 00:01:29,429 --> 00:01:29,439 and av8b here at lewis research center 57 00:01:29,439 --> 00:01:31,670 and av8b here at lewis research center we are currently testing scale models of 58 00:01:31,670 --> 00:01:31,680 we are currently testing scale models of 59 00:01:31,680 --> 00:01:32,469 we are currently testing scale models of advanced 60 00:01:32,469 --> 00:01:32,479 advanced 61 00:01:32,479 --> 00:01:35,590 advanced supersonic stoval concepts hot gas 62 00:01:35,590 --> 00:01:35,600 supersonic stoval concepts hot gas 63 00:01:35,600 --> 00:01:36,550 supersonic stoval concepts hot gas ingestion 64 00:01:36,550 --> 00:01:36,560 ingestion 65 00:01:36,560 --> 00:01:38,950 ingestion and controls and propulsion system 66 00:01:38,950 --> 00:01:38,960 and controls and propulsion system 67 00:01:38,960 --> 00:01:40,230 and controls and propulsion system technology 68 00:01:40,230 --> 00:01:40,240 technology 69 00:01:40,240 --> 00:01:42,870 technology lewis's main role then is to develop 70 00:01:42,870 --> 00:01:42,880 lewis's main role then is to develop 71 00:01:42,880 --> 00:01:44,950 lewis's main role then is to develop advanced propulsion concepts for air 72 00:01:44,950 --> 00:01:44,960 advanced propulsion concepts for air 73 00:01:44,960 --> 00:01:45,590 advanced propulsion concepts for air breathing 74 00:01:45,590 --> 00:01:45,600 breathing 75 00:01:45,600 --> 00:01:48,230 breathing aircraft a stovall is an air breathing 76 00:01:48,230 --> 00:01:48,240 aircraft a stovall is an air breathing 77 00:01:48,240 --> 00:01:49,190 aircraft a stovall is an air breathing aircraft 78 00:01:49,190 --> 00:01:49,200 aircraft 79 00:01:49,200 --> 00:01:52,310 aircraft we develop the engines we develop the 80 00:01:52,310 --> 00:01:52,320 we develop the engines we develop the 81 00:01:52,320 --> 00:01:54,469 we develop the engines we develop the propulsion components that are required 82 00:01:54,469 --> 00:01:54,479 propulsion components that are required 83 00:01:54,479 --> 00:01:55,670 propulsion components that are required to 84 00:01:55,670 --> 00:01:55,680 to 85 00:01:55,680 --> 00:01:58,469 to power these type of aircraft there are 86 00:01:58,469 --> 00:01:58,479 power these type of aircraft there are 87 00:01:58,479 --> 00:02:00,870 power these type of aircraft there are five types of propulsion concepts for 88 00:02:00,870 --> 00:02:00,880 five types of propulsion concepts for 89 00:02:00,880 --> 00:02:03,109 five types of propulsion concepts for stovle type aircraft 90 00:02:03,109 --> 00:02:03,119 stovle type aircraft 91 00:02:03,119 --> 00:02:07,749 stovle type aircraft vectored thrust ejector augmenter 92 00:02:07,749 --> 00:02:07,759 vectored thrust ejector augmenter 93 00:02:07,759 --> 00:02:11,190 vectored thrust ejector augmenter augmented lift system lift plus 94 00:02:11,190 --> 00:02:11,200 augmented lift system lift plus 95 00:02:11,200 --> 00:02:14,229 augmented lift system lift plus lift crews and the tandem fan 96 00:02:14,229 --> 00:02:14,239 lift crews and the tandem fan 97 00:02:14,239 --> 00:02:17,430 lift crews and the tandem fan configuration the one that we see 98 00:02:17,430 --> 00:02:17,440 configuration the one that we see 99 00:02:17,440 --> 00:02:19,110 configuration the one that we see the most of in the news today is the 100 00:02:19,110 --> 00:02:19,120 the most of in the news today is the 101 00:02:19,120 --> 00:02:20,550 the most of in the news today is the harrier and that's the vector 102 00:02:20,550 --> 00:02:20,560 harrier and that's the vector 103 00:02:20,560 --> 00:02:22,949 harrier and that's the vector thrust type of configuration it uses an 104 00:02:22,949 --> 00:02:22,959 thrust type of configuration it uses an 105 00:02:22,959 --> 00:02:24,390 thrust type of configuration it uses an engine has four 106 00:02:24,390 --> 00:02:24,400 engine has four 107 00:02:24,400 --> 00:02:28,309 engine has four variable nozzles on it that can be aimed 108 00:02:28,309 --> 00:02:28,319 variable nozzles on it that can be aimed 109 00:02:28,319 --> 00:02:28,710 variable nozzles on it that can be aimed in a 110 00:02:28,710 --> 00:02:28,720 in a 111 00:02:28,720 --> 00:02:31,990 in a either in the vertical direction or or 112 00:02:31,990 --> 00:02:32,000 either in the vertical direction or or 113 00:02:32,000 --> 00:02:34,390 either in the vertical direction or or horizontally for forward flight each of 114 00:02:34,390 --> 00:02:34,400 horizontally for forward flight each of 115 00:02:34,400 --> 00:02:36,070 horizontally for forward flight each of these systems have specific 116 00:02:36,070 --> 00:02:36,080 these systems have specific 117 00:02:36,080 --> 00:02:39,110 these systems have specific advantages and disadvantages but one of 118 00:02:39,110 --> 00:02:39,120 advantages and disadvantages but one of 119 00:02:39,120 --> 00:02:40,470 advantages and disadvantages but one of the main problems 120 00:02:40,470 --> 00:02:40,480 the main problems 121 00:02:40,480 --> 00:02:43,430 the main problems is one of technology there are several 122 00:02:43,430 --> 00:02:43,440 is one of technology there are several 123 00:02:43,440 --> 00:02:45,670 is one of technology there are several really key concepts that 124 00:02:45,670 --> 00:02:45,680 really key concepts that 125 00:02:45,680 --> 00:02:48,070 really key concepts that propulsion technologies that have to be 126 00:02:48,070 --> 00:02:48,080 propulsion technologies that have to be 127 00:02:48,080 --> 00:02:49,270 propulsion technologies that have to be developed 128 00:02:49,270 --> 00:02:49,280 developed 129 00:02:49,280 --> 00:02:52,390 developed one of the more obvious ones is that you 130 00:02:52,390 --> 00:02:52,400 one of the more obvious ones is that you 131 00:02:52,400 --> 00:02:54,550 one of the more obvious ones is that you in order to make these airplanes flyable 132 00:02:54,550 --> 00:02:54,560 in order to make these airplanes flyable 133 00:02:54,560 --> 00:02:56,390 in order to make these airplanes flyable you have to get lightweight 134 00:02:56,390 --> 00:02:56,400 you have to get lightweight 135 00:02:56,400 --> 00:02:58,790 you have to get lightweight propulsion systems nasa and the 136 00:02:58,790 --> 00:02:58,800 propulsion systems nasa and the 137 00:02:58,800 --> 00:03:00,710 propulsion systems nasa and the department of defense have a major 138 00:03:00,710 --> 00:03:00,720 department of defense have a major 139 00:03:00,720 --> 00:03:03,190 department of defense have a major activity going on to develop lightweight 140 00:03:03,190 --> 00:03:03,200 activity going on to develop lightweight 141 00:03:03,200 --> 00:03:04,630 activity going on to develop lightweight high thrust await 142 00:03:04,630 --> 00:03:04,640 high thrust await 143 00:03:04,640 --> 00:03:07,830 high thrust await basic engine concepts that applies to 144 00:03:07,830 --> 00:03:07,840 basic engine concepts that applies to 145 00:03:07,840 --> 00:03:09,430 basic engine concepts that applies to all advanced fighters 146 00:03:09,430 --> 00:03:09,440 all advanced fighters 147 00:03:09,440 --> 00:03:11,430 all advanced fighters in the case of stovall then there's some 148 00:03:11,430 --> 00:03:11,440 in the case of stovall then there's some 149 00:03:11,440 --> 00:03:13,110 in the case of stovall then there's some other special issues 150 00:03:13,110 --> 00:03:13,120 other special issues 151 00:03:13,120 --> 00:03:15,589 other special issues one is the lift concepts themselves the 152 00:03:15,589 --> 00:03:15,599 one is the lift concepts themselves the 153 00:03:15,599 --> 00:03:16,949 one is the lift concepts themselves the ejector system 154 00:03:16,949 --> 00:03:16,959 ejector system 155 00:03:16,959 --> 00:03:20,949 ejector system the raw system lift engines 156 00:03:20,949 --> 00:03:20,959 the raw system lift engines 157 00:03:20,959 --> 00:03:23,430 the raw system lift engines those all have to be the technologies 158 00:03:23,430 --> 00:03:23,440 those all have to be the technologies 159 00:03:23,440 --> 00:03:25,270 those all have to be the technologies associated with those concepts have to 160 00:03:25,270 --> 00:03:25,280 associated with those concepts have to 161 00:03:25,280 --> 00:03:26,710 associated with those concepts have to be developed 162 00:03:26,710 --> 00:03:26,720 be developed 163 00:03:26,720 --> 00:03:28,149 be developed specifically here at lewis we're 164 00:03:28,149 --> 00:03:28,159 specifically here at lewis we're 165 00:03:28,159 --> 00:03:30,630 specifically here at lewis we're investigating the ejector concept 166 00:03:30,630 --> 00:03:30,640 investigating the ejector concept 167 00:03:30,640 --> 00:03:34,070 investigating the ejector concept as part of our current program um 168 00:03:34,070 --> 00:03:34,080 as part of our current program um 169 00:03:34,080 --> 00:03:39,589 as part of our current program um then additional items uh on the list uh 170 00:03:39,589 --> 00:03:39,599 then additional items uh on the list uh 171 00:03:39,599 --> 00:03:42,390 then additional items uh on the list uh a lot of these concepts have uh complex 172 00:03:42,390 --> 00:03:42,400 a lot of these concepts have uh complex 173 00:03:42,400 --> 00:03:43,830 a lot of these concepts have uh complex internal ducting that 174 00:03:43,830 --> 00:03:43,840 internal ducting that 175 00:03:43,840 --> 00:03:46,630 internal ducting that that occurs inside the aircraft fan air 176 00:03:46,630 --> 00:03:46,640 that occurs inside the aircraft fan air 177 00:03:46,640 --> 00:03:47,830 that occurs inside the aircraft fan air collection systems 178 00:03:47,830 --> 00:03:47,840 collection systems 179 00:03:47,840 --> 00:03:49,589 collection systems valves and so on these things have to be 180 00:03:49,589 --> 00:03:49,599 valves and so on these things have to be 181 00:03:49,599 --> 00:03:51,910 valves and so on these things have to be developed to make them compact 182 00:03:51,910 --> 00:03:51,920 developed to make them compact 183 00:03:51,920 --> 00:03:55,350 developed to make them compact lightweight efficient yet at the same 184 00:03:55,350 --> 00:03:55,360 lightweight efficient yet at the same 185 00:03:55,360 --> 00:03:57,670 lightweight efficient yet at the same time not have large pressure losses 186 00:03:57,670 --> 00:03:57,680 time not have large pressure losses 187 00:03:57,680 --> 00:04:00,390 time not have large pressure losses at the 9 by 15 foot low speed wind 188 00:04:00,390 --> 00:04:00,400 at the 9 by 15 foot low speed wind 189 00:04:00,400 --> 00:04:00,869 at the 9 by 15 foot low speed wind tunnel 190 00:04:00,869 --> 00:04:00,879 tunnel 191 00:04:00,879 --> 00:04:03,350 tunnel at louis we are looking at some of the 192 00:04:03,350 --> 00:04:03,360 at louis we are looking at some of the 193 00:04:03,360 --> 00:04:05,030 at louis we are looking at some of the problem areas 194 00:04:05,030 --> 00:04:05,040 problem areas 195 00:04:05,040 --> 00:04:08,390 problem areas hot gas ingestion avoidance and ground 196 00:04:08,390 --> 00:04:08,400 hot gas ingestion avoidance and ground 197 00:04:08,400 --> 00:04:09,910 hot gas ingestion avoidance and ground flow field effects 198 00:04:09,910 --> 00:04:09,920 flow field effects 199 00:04:09,920 --> 00:04:12,789 flow field effects on stovall aircraft another technical 200 00:04:12,789 --> 00:04:12,799 on stovall aircraft another technical 201 00:04:12,799 --> 00:04:13,990 on stovall aircraft another technical problem that we're looking at 202 00:04:13,990 --> 00:04:14,000 problem that we're looking at 203 00:04:14,000 --> 00:04:17,110 problem that we're looking at is the hot gas ingestion problem 204 00:04:17,110 --> 00:04:17,120 is the hot gas ingestion problem 205 00:04:17,120 --> 00:04:18,789 is the hot gas ingestion problem this is where while many of these 206 00:04:18,789 --> 00:04:18,799 this is where while many of these 207 00:04:18,799 --> 00:04:20,390 this is where while many of these concepts have 208 00:04:20,390 --> 00:04:20,400 concepts have 209 00:04:20,400 --> 00:04:22,710 concepts have hot gas which is produced forward on the 210 00:04:22,710 --> 00:04:22,720 hot gas which is produced forward on the 211 00:04:22,720 --> 00:04:25,430 hot gas which is produced forward on the aircraft usually by burning fuel in 212 00:04:25,430 --> 00:04:25,440 aircraft usually by burning fuel in 213 00:04:25,440 --> 00:04:28,310 aircraft usually by burning fuel in in the vertical lift system this hot gas 214 00:04:28,310 --> 00:04:28,320 in the vertical lift system this hot gas 215 00:04:28,320 --> 00:04:30,070 in the vertical lift system this hot gas goes down hits the ground 216 00:04:30,070 --> 00:04:30,080 goes down hits the ground 217 00:04:30,080 --> 00:04:32,390 goes down hits the ground is is reflected back up and ingested by 218 00:04:32,390 --> 00:04:32,400 is is reflected back up and ingested by 219 00:04:32,400 --> 00:04:34,790 is is reflected back up and ingested by the inlet systems on the aircraft 220 00:04:34,790 --> 00:04:34,800 the inlet systems on the aircraft 221 00:04:34,800 --> 00:04:39,189 the inlet systems on the aircraft and turbine engines do not like hot gas 222 00:04:39,189 --> 00:04:39,199 and turbine engines do not like hot gas 223 00:04:39,199 --> 00:04:41,270 and turbine engines do not like hot gas they lose their power or they or 224 00:04:41,270 --> 00:04:41,280 they lose their power or they or 225 00:04:41,280 --> 00:04:42,629 they lose their power or they or something else happens and 226 00:04:42,629 --> 00:04:42,639 something else happens and 227 00:04:42,639 --> 00:04:44,950 something else happens and it's a major problem there are other 228 00:04:44,950 --> 00:04:44,960 it's a major problem there are other 229 00:04:44,960 --> 00:04:46,790 it's a major problem there are other problems that are associated with 230 00:04:46,790 --> 00:04:46,800 problems that are associated with 231 00:04:46,800 --> 00:04:48,310 problems that are associated with stovall aircraft 232 00:04:48,310 --> 00:04:48,320 stovall aircraft 233 00:04:48,320 --> 00:04:50,710 stovall aircraft and in conjunction with nasa langley 234 00:04:50,710 --> 00:04:50,720 and in conjunction with nasa langley 235 00:04:50,720 --> 00:04:51,830 and in conjunction with nasa langley research center 236 00:04:51,830 --> 00:04:51,840 research center 237 00:04:51,840 --> 00:04:54,950 research center and nasa ames research center the nasa 238 00:04:54,950 --> 00:04:54,960 and nasa ames research center the nasa 239 00:04:54,960 --> 00:04:57,270 and nasa ames research center the nasa lewis research center is continuing in 240 00:04:57,270 --> 00:04:57,280 lewis research center is continuing in 241 00:04:57,280 --> 00:04:58,230 lewis research center is continuing in its quest 242 00:04:58,230 --> 00:04:58,240 its quest 243 00:04:58,240 --> 00:05:02,070 its quest to produce a viable lightweight reliable 244 00:05:02,070 --> 00:05:02,080 to produce a viable lightweight reliable 245 00:05:02,080 --> 00:05:04,469 to produce a viable lightweight reliable propulsion system these aircraft have to 246 00:05:04,469 --> 00:05:04,479 propulsion system these aircraft have to 247 00:05:04,479 --> 00:05:06,790 propulsion system these aircraft have to operate efficiently at supersonic speeds 248 00:05:06,790 --> 00:05:06,800 operate efficiently at supersonic speeds 249 00:05:06,800 --> 00:05:09,430 operate efficiently at supersonic speeds as well as at very low speeds 250 00:05:09,430 --> 00:05:09,440 as well as at very low speeds 251 00:05:09,440 --> 00:05:12,390 as well as at very low speeds with very high air flows and as a result 252 00:05:12,390 --> 00:05:12,400 with very high air flows and as a result 253 00:05:12,400 --> 00:05:14,310 with very high air flows and as a result there's a problem of getting 254 00:05:14,310 --> 00:05:14,320 there's a problem of getting 255 00:05:14,320 --> 00:05:16,150 there's a problem of getting inlets that have high performance both 256 00:05:16,150 --> 00:05:16,160 inlets that have high performance both 257 00:05:16,160 --> 00:05:18,390 inlets that have high performance both at supersonic conditions and also at 258 00:05:18,390 --> 00:05:18,400 at supersonic conditions and also at 259 00:05:18,400 --> 00:05:20,790 at supersonic conditions and also at essentially static conditions while in 260 00:05:20,790 --> 00:05:20,800 essentially static conditions while in 261 00:05:20,800 --> 00:05:21,510 essentially static conditions while in hover 262 00:05:21,510 --> 00:05:21,520 hover 263 00:05:21,520 --> 00:05:23,909 hover possibly at high angles of attack which 264 00:05:23,909 --> 00:05:23,919 possibly at high angles of attack which 265 00:05:23,919 --> 00:05:25,029 possibly at high angles of attack which which result in 266 00:05:25,029 --> 00:05:25,039 which result in 267 00:05:25,039 --> 00:05:29,110 which result in in flow problems for the inlet system 268 00:05:29,110 --> 00:05:29,120 in flow problems for the inlet system 269 00:05:29,120 --> 00:05:32,790 in flow problems for the inlet system nozzle systems are a key problem here 270 00:05:32,790 --> 00:05:32,800 nozzle systems are a key problem here 271 00:05:32,800 --> 00:05:33,670 nozzle systems are a key problem here from the 272 00:05:33,670 --> 00:05:33,680 from the 273 00:05:33,680 --> 00:05:35,670 from the standpoint that they tend to be in 274 00:05:35,670 --> 00:05:35,680 standpoint that they tend to be in 275 00:05:35,680 --> 00:05:37,590 standpoint that they tend to be in today's aircraft very heavy if we 276 00:05:37,590 --> 00:05:37,600 today's aircraft very heavy if we 277 00:05:37,600 --> 00:05:39,830 today's aircraft very heavy if we put the kind of requirements that a 278 00:05:39,830 --> 00:05:39,840 put the kind of requirements that a 279 00:05:39,840 --> 00:05:41,110 put the kind of requirements that a stovall has so 280 00:05:41,110 --> 00:05:41,120 stovall has so 281 00:05:41,120 --> 00:05:43,350 stovall has so so a major program has to be evolved to 282 00:05:43,350 --> 00:05:43,360 so a major program has to be evolved to 283 00:05:43,360 --> 00:05:44,390 so a major program has to be evolved to develop advanced 284 00:05:44,390 --> 00:05:44,400 develop advanced 285 00:05:44,400 --> 00:05:47,830 develop advanced nozzle concepts and last but not least 286 00:05:47,830 --> 00:05:47,840 nozzle concepts and last but not least 287 00:05:47,840 --> 00:05:48,950 nozzle concepts and last but not least is the 288 00:05:48,950 --> 00:05:48,960 is the 289 00:05:48,960 --> 00:05:50,790 is the is the main is a key problem for the 290 00:05:50,790 --> 00:05:50,800 is the main is a key problem for the 291 00:05:50,800 --> 00:05:52,150 is the main is a key problem for the pilot and that is 292 00:05:52,150 --> 00:05:52,160 pilot and that is 293 00:05:52,160 --> 00:05:54,550 pilot and that is the pilot has to be able to control this 294 00:05:54,550 --> 00:05:54,560 the pilot has to be able to control this 295 00:05:54,560 --> 00:05:55,590 the pilot has to be able to control this beast while he's 296 00:05:55,590 --> 00:05:55,600 beast while he's 297 00:05:55,600 --> 00:05:58,950 beast while he's uh doing his mission and 298 00:05:58,950 --> 00:05:58,960 uh doing his mission and 299 00:05:58,960 --> 00:06:01,430 uh doing his mission and the harrier is a difficult aircraft to 300 00:06:01,430 --> 00:06:01,440 the harrier is a difficult aircraft to 301 00:06:01,440 --> 00:06:03,990 the harrier is a difficult aircraft to fly 302 00:06:03,990 --> 00:06:04,000 303 00:06:04,000 --> 00:06:05,749 one of the areas that we in conjunction 304 00:06:05,749 --> 00:06:05,759 one of the areas that we in conjunction 305 00:06:05,759 --> 00:06:07,430 one of the areas that we in conjunction with aims we have a joint program with 306 00:06:07,430 --> 00:06:07,440 with aims we have a joint program with 307 00:06:07,440 --> 00:06:09,590 with aims we have a joint program with aim specifically in this area 308 00:06:09,590 --> 00:06:09,600 aim specifically in this area 309 00:06:09,600 --> 00:06:12,390 aim specifically in this area to address how do we get the right pilot 310 00:06:12,390 --> 00:06:12,400 to address how do we get the right pilot 311 00:06:12,400 --> 00:06:13,350 to address how do we get the right pilot interfaces 312 00:06:13,350 --> 00:06:13,360 interfaces 313 00:06:13,360 --> 00:06:16,150 interfaces there to fly the airplane in a manner 314 00:06:16,150 --> 00:06:16,160 there to fly the airplane in a manner 315 00:06:16,160 --> 00:06:16,629 there to fly the airplane in a manner which 316 00:06:16,629 --> 00:06:16,639 which 317 00:06:16,639 --> 00:06:19,110 which which makes it easy for him to fly we 318 00:06:19,110 --> 00:06:19,120 which makes it easy for him to fly we 319 00:06:19,120 --> 00:06:21,510 which makes it easy for him to fly we could build a stovall airplane today 320 00:06:21,510 --> 00:06:21,520 could build a stovall airplane today 321 00:06:21,520 --> 00:06:23,189 could build a stovall airplane today the problem is that it would be too 322 00:06:23,189 --> 00:06:23,199 the problem is that it would be too 323 00:06:23,199 --> 00:06:25,590 the problem is that it would be too heavy and not particularly practical 324 00:06:25,590 --> 00:06:25,600 heavy and not particularly practical 325 00:06:25,600 --> 00:06:28,150 heavy and not particularly practical for what it can do for a mission okay 326 00:06:28,150 --> 00:06:28,160 for what it can do for a mission okay 327 00:06:28,160 --> 00:06:28,629 for what it can do for a mission okay and 328 00:06:28,629 --> 00:06:28,639 and 329 00:06:28,639 --> 00:06:30,469 and the main thing that we're trying to 330 00:06:30,469 --> 00:06:30,479 the main thing that we're trying to 331 00:06:30,479 --> 00:06:31,830 the main thing that we're trying to develop now 332 00:06:31,830 --> 00:06:31,840 develop now 333 00:06:31,840 --> 00:06:35,350 develop now is a supersonic capability an aircraft 334 00:06:35,350 --> 00:06:35,360 is a supersonic capability an aircraft 335 00:06:35,360 --> 00:06:35,670 is a supersonic capability an aircraft with 336 00:06:35,670 --> 00:06:35,680 with 337 00:06:35,680 --> 00:06:38,870 with adequate range and reasonable payload 338 00:06:38,870 --> 00:06:38,880 adequate range and reasonable payload 339 00:06:38,880 --> 00:06:41,270 adequate range and reasonable payload and that that's the main thrust of of 340 00:06:41,270 --> 00:06:41,280 and that that's the main thrust of of 341 00:06:41,280 --> 00:06:43,510 and that that's the main thrust of of the advanced technology 342 00:06:43,510 --> 00:06:43,520 the advanced technology 343 00:06:43,520 --> 00:06:45,909 the advanced technology we know that stovall works it's a 344 00:06:45,909 --> 00:06:45,919 we know that stovall works it's a 345 00:06:45,919 --> 00:06:47,909 we know that stovall works it's a question of getting an aircraft which 346 00:06:47,909 --> 00:06:47,919 question of getting an aircraft which 347 00:06:47,919 --> 00:06:49,510 question of getting an aircraft which provides the 348 00:06:49,510 --> 00:06:49,520 provides the 349 00:06:49,520 --> 00:06:51,189 provides the or meets the requirements that the 350 00:06:51,189 --> 00:06:51,199 or meets the requirements that the 351 00:06:51,199 --> 00:07:00,639 or meets the requirements that the services want