1 00:00:00,000 --> 00:00:45,510 I 2 00:00:45,510 --> 00:00:45,520 3 00:00:45,520 --> 00:00:49,300 by the year 2000 the FAA will likely 4 00:00:49,300 --> 00:00:49,310 by the year 2000 the FAA will likely 5 00:00:49,310 --> 00:00:52,090 by the year 2000 the FAA will likely require further reductions in aircraft 6 00:00:52,090 --> 00:00:52,100 require further reductions in aircraft 7 00:00:52,100 --> 00:00:55,479 require further reductions in aircraft noise more than a decade of research and 8 00:00:55,479 --> 00:00:55,489 noise more than a decade of research and 9 00:00:55,489 --> 00:00:57,130 noise more than a decade of research and development by the Aeronautics industry 10 00:00:57,130 --> 00:00:57,140 development by the Aeronautics industry 11 00:00:57,140 --> 00:01:02,350 development by the Aeronautics industry has focused on compliance after two 12 00:01:02,350 --> 00:01:02,360 has focused on compliance after two 13 00:01:02,360 --> 00:01:05,049 has focused on compliance after two years of wind tunnel tests a model 14 00:01:05,049 --> 00:01:05,059 years of wind tunnel tests a model 15 00:01:05,059 --> 00:01:07,180 years of wind tunnel tests a model designed to meet that proposed FAA 16 00:01:07,180 --> 00:01:07,190 designed to meet that proposed FAA 17 00:01:07,190 --> 00:01:09,940 designed to meet that proposed FAA standard it's crated and shipped for 18 00:01:09,940 --> 00:01:09,950 standard it's crated and shipped for 19 00:01:09,950 --> 00:01:13,030 standard it's crated and shipped for further testing designed by pratt & 20 00:01:13,030 --> 00:01:13,040 further testing designed by pratt & 21 00:01:13,040 --> 00:01:14,920 further testing designed by pratt & whitney a division of united 22 00:01:14,920 --> 00:01:14,930 whitney a division of united 23 00:01:14,930 --> 00:01:17,920 whitney a division of united technologies the model was tested in two 24 00:01:17,920 --> 00:01:17,930 technologies the model was tested in two 25 00:01:17,930 --> 00:01:20,469 technologies the model was tested in two of the six wind tunnels at NASA Lewis 26 00:01:20,469 --> 00:01:20,479 of the six wind tunnels at NASA Lewis 27 00:01:20,479 --> 00:01:24,400 of the six wind tunnels at NASA Lewis Research Center in Cleveland Ohio the 28 00:01:24,400 --> 00:01:24,410 Research Center in Cleveland Ohio the 29 00:01:24,410 --> 00:01:26,469 Research Center in Cleveland Ohio the joint effort between NASA and this 30 00:01:26,469 --> 00:01:26,479 joint effort between NASA and this 31 00:01:26,479 --> 00:01:29,040 joint effort between NASA and this leading manufacturer of aircraft engines 32 00:01:29,040 --> 00:01:29,050 leading manufacturer of aircraft engines 33 00:01:29,050 --> 00:01:31,900 leading manufacturer of aircraft engines explored the acoustics aerodynamic 34 00:01:31,900 --> 00:01:31,910 explored the acoustics aerodynamic 35 00:01:31,910 --> 00:01:34,480 explored the acoustics aerodynamic performance and the operability of the 36 00:01:34,480 --> 00:01:34,490 performance and the operability of the 37 00:01:34,490 --> 00:01:37,300 performance and the operability of the advanced ducted propeller known as the 38 00:01:37,300 --> 00:01:37,310 advanced ducted propeller known as the 39 00:01:37,310 --> 00:01:41,590 advanced ducted propeller known as the ADP initial indications are that from 40 00:01:41,590 --> 00:01:41,600 ADP initial indications are that from 41 00:01:41,600 --> 00:01:44,350 ADP initial indications are that from this new design a quieter better 42 00:01:44,350 --> 00:01:44,360 this new design a quieter better 43 00:01:44,360 --> 00:01:49,340 this new design a quieter better performing engine will emerge 44 00:01:49,340 --> 00:01:49,350 45 00:01:49,350 --> 00:01:52,560 the model scaled to one-sixth of the 46 00:01:52,560 --> 00:01:52,570 the model scaled to one-sixth of the 47 00:01:52,570 --> 00:01:55,709 the model scaled to one-sixth of the actual design was tested here in this 48 00:01:55,709 --> 00:01:55,719 actual design was tested here in this 49 00:01:55,719 --> 00:01:58,919 actual design was tested here in this tunnel commonly called the 9 by 15 which 50 00:01:58,919 --> 00:01:58,929 tunnel commonly called the 9 by 15 which 51 00:01:58,929 --> 00:02:01,139 tunnel commonly called the 9 by 15 which are the dimensions of the wind chamber 52 00:02:01,139 --> 00:02:01,149 are the dimensions of the wind chamber 53 00:02:01,149 --> 00:02:20,160 are the dimensions of the wind chamber itself 54 00:02:20,160 --> 00:02:20,170 55 00:02:20,170 --> 00:02:22,770 this tunnel is nested in the return leg 56 00:02:22,770 --> 00:02:22,780 this tunnel is nested in the return leg 57 00:02:22,780 --> 00:02:26,070 this tunnel is nested in the return leg of the eight by six tunnel while the 58 00:02:26,070 --> 00:02:26,080 of the eight by six tunnel while the 59 00:02:26,080 --> 00:02:28,800 of the eight by six tunnel while the eight by six has supersonic capabilities 60 00:02:28,800 --> 00:02:28,810 eight by six has supersonic capabilities 61 00:02:28,810 --> 00:02:31,830 eight by six has supersonic capabilities only the subsonic speeds were used to 62 00:02:31,830 --> 00:02:31,840 only the subsonic speeds were used to 63 00:02:31,840 --> 00:02:35,339 only the subsonic speeds were used to test the ADP for the arrow propulsion 64 00:02:35,339 --> 00:02:35,349 test the ADP for the arrow propulsion 65 00:02:35,349 --> 00:02:38,010 test the ADP for the arrow propulsion facilities and experiments division this 66 00:02:38,010 --> 00:02:38,020 facilities and experiments division this 67 00:02:38,020 --> 00:02:41,910 facilities and experiments division this project began over three years ago at 68 00:02:41,910 --> 00:02:41,920 project began over three years ago at 69 00:02:41,920 --> 00:02:44,100 project began over three years ago at that time Lewis engineers started 70 00:02:44,100 --> 00:02:44,110 that time Lewis engineers started 71 00:02:44,110 --> 00:02:46,710 that time Lewis engineers started working closely with Pratt & Whitney to 72 00:02:46,710 --> 00:02:46,720 working closely with Pratt & Whitney to 73 00:02:46,720 --> 00:02:49,220 working closely with Pratt & Whitney to define the test parameters for the model 74 00:02:49,220 --> 00:02:49,230 define the test parameters for the model 75 00:02:49,230 --> 00:02:52,229 define the test parameters for the model this preparation ensured that the wind 76 00:02:52,229 --> 00:02:52,239 this preparation ensured that the wind 77 00:02:52,239 --> 00:02:54,750 this preparation ensured that the wind tunnels and the model were ready for 78 00:02:54,750 --> 00:02:54,760 tunnels and the model were ready for 79 00:02:54,760 --> 00:02:58,530 tunnels and the model were ready for each other the tunnel control room is 80 00:02:58,530 --> 00:02:58,540 each other the tunnel control room is 81 00:02:58,540 --> 00:03:01,470 each other the tunnel control room is the hub of adp research state-of-the-art 82 00:03:01,470 --> 00:03:01,480 the hub of adp research state-of-the-art 83 00:03:01,480 --> 00:03:03,870 the hub of adp research state-of-the-art equipment allows researchers to collect 84 00:03:03,870 --> 00:03:03,880 equipment allows researchers to collect 85 00:03:03,880 --> 00:03:08,190 equipment allows researchers to collect valuable data and monitor testing at the 86 00:03:08,190 --> 00:03:08,200 valuable data and monitor testing at the 87 00:03:08,200 --> 00:03:11,100 valuable data and monitor testing at the close of this last day an engineer 88 00:03:11,100 --> 00:03:11,110 close of this last day an engineer 89 00:03:11,110 --> 00:03:55,350 close of this last day an engineer reviews one of the nine test phases 90 00:03:55,350 --> 00:03:55,360 91 00:03:55,360 --> 00:04:00,100 green light successful testing of any 92 00:04:00,100 --> 00:04:00,110 green light successful testing of any 93 00:04:00,110 --> 00:04:03,010 green light successful testing of any model requires the skills and talents of 94 00:04:03,010 --> 00:04:03,020 model requires the skills and talents of 95 00:04:03,020 --> 00:04:05,770 model requires the skills and talents of a number of people test day brings 96 00:04:05,770 --> 00:04:05,780 a number of people test day brings 97 00:04:05,780 --> 00:04:08,650 a number of people test day brings together those abilities in preparation 98 00:04:08,650 --> 00:04:08,660 together those abilities in preparation 99 00:04:08,660 --> 00:04:24,280 together those abilities in preparation for each experiment 100 00:04:24,280 --> 00:04:24,290 101 00:04:24,290 --> 00:04:32,020 two green lights 102 00:04:32,020 --> 00:04:32,030 103 00:04:32,030 --> 00:04:34,990 blowing air 104 00:04:34,990 --> 00:04:35,000 105 00:04:35,000 --> 00:04:45,550 and so begins the test the tunnel 106 00:04:45,550 --> 00:04:45,560 and so begins the test the tunnel 107 00:04:45,560 --> 00:04:48,010 and so begins the test the tunnel operators control tunnel systems to 108 00:04:48,010 --> 00:04:48,020 operators control tunnel systems to 109 00:04:48,020 --> 00:04:51,400 operators control tunnel systems to obtain desired air speeds the ADP was 110 00:04:51,400 --> 00:04:51,410 obtain desired air speeds the ADP was 111 00:04:51,410 --> 00:04:53,590 obtain desired air speeds the ADP was tested over a Mach number range from 112 00:04:53,590 --> 00:04:53,600 tested over a Mach number range from 113 00:04:53,600 --> 00:04:59,680 tested over a Mach number range from zero 2.85 the model operator controls 114 00:04:59,680 --> 00:04:59,690 zero 2.85 the model operator controls 115 00:04:59,690 --> 00:05:03,040 zero 2.85 the model operator controls rpms by regulating the compressed air to 116 00:05:03,040 --> 00:05:03,050 rpms by regulating the compressed air to 117 00:05:03,050 --> 00:05:06,910 rpms by regulating the compressed air to the models drive turbo rpms for the ADP 118 00:05:06,910 --> 00:05:06,920 the models drive turbo rpms for the ADP 119 00:05:06,920 --> 00:05:13,000 the models drive turbo rpms for the ADP ranged from windmill to 12300 during 120 00:05:13,000 --> 00:05:13,010 ranged from windmill to 12300 during 121 00:05:13,010 --> 00:05:15,690 ranged from windmill to 12300 during testing the models safety is ensured by 122 00:05:15,690 --> 00:05:15,700 testing the models safety is ensured by 123 00:05:15,700 --> 00:05:18,490 testing the models safety is ensured by continuous monitoring of vibration and 124 00:05:18,490 --> 00:05:18,500 continuous monitoring of vibration and 125 00:05:18,500 --> 00:05:23,560 continuous monitoring of vibration and temperatures the engineer who monitors 126 00:05:23,560 --> 00:05:23,570 temperatures the engineer who monitors 127 00:05:23,570 --> 00:05:25,840 temperatures the engineer who monitors stress ensures that the predetermined 128 00:05:25,840 --> 00:05:25,850 stress ensures that the predetermined 129 00:05:25,850 --> 00:05:28,990 stress ensures that the predetermined stress limits on blades stator veins and 130 00:05:28,990 --> 00:05:29,000 stress limits on blades stator veins and 131 00:05:29,000 --> 00:05:35,200 stress limits on blades stator veins and instrumentation are not exceeded the 132 00:05:35,200 --> 00:05:35,210 instrumentation are not exceeded the 133 00:05:35,210 --> 00:05:37,210 instrumentation are not exceeded the primary researcher has lead 134 00:05:37,210 --> 00:05:37,220 primary researcher has lead 135 00:05:37,220 --> 00:05:40,240 primary researcher has lead responsibility for all aspects of ADP 136 00:05:40,240 --> 00:05:40,250 responsibility for all aspects of ADP 137 00:05:40,250 --> 00:05:43,540 responsibility for all aspects of ADP testing ongoing communications about the 138 00:05:43,540 --> 00:05:43,550 testing ongoing communications about the 139 00:05:43,550 --> 00:05:45,760 testing ongoing communications about the tunnel and model aid the Lewis 140 00:05:45,760 --> 00:05:45,770 tunnel and model aid the Lewis 141 00:05:45,770 --> 00:05:47,890 tunnel and model aid the Lewis researcher in making decisions about 142 00:05:47,890 --> 00:05:47,900 researcher in making decisions about 143 00:05:47,900 --> 00:05:51,490 researcher in making decisions about each test condition the primary 144 00:05:51,490 --> 00:05:51,500 each test condition the primary 145 00:05:51,500 --> 00:05:54,040 each test condition the primary researcher is supported by a counterpart 146 00:05:54,040 --> 00:05:54,050 researcher is supported by a counterpart 147 00:05:54,050 --> 00:05:58,870 researcher is supported by a counterpart who helps monitor online test data all 148 00:05:58,870 --> 00:05:58,880 who helps monitor online test data all 149 00:05:58,880 --> 00:06:01,840 who helps monitor online test data all these people depend on the electronics 150 00:06:01,840 --> 00:06:01,850 these people depend on the electronics 151 00:06:01,850 --> 00:06:04,630 these people depend on the electronics engineer who has complete responsibility 152 00:06:04,630 --> 00:06:04,640 engineer who has complete responsibility 153 00:06:04,640 --> 00:06:06,969 engineer who has complete responsibility for the electronics in the model the 154 00:06:06,969 --> 00:06:06,979 for the electronics in the model the 155 00:06:06,979 --> 00:06:09,580 for the electronics in the model the hardware the instrumentation and the 156 00:06:09,580 --> 00:06:09,590 hardware the instrumentation and the 157 00:06:09,590 --> 00:06:13,090 hardware the instrumentation and the computer system the ADP is a gear-driven 158 00:06:13,090 --> 00:06:13,100 computer system the ADP is a gear-driven 159 00:06:13,100 --> 00:06:16,090 computer system the ADP is a gear-driven fan with variable pitch much like a 160 00:06:16,090 --> 00:06:16,100 fan with variable pitch much like a 161 00:06:16,100 --> 00:06:19,750 fan with variable pitch much like a turboprop however a duct encircles the 162 00:06:19,750 --> 00:06:19,760 turboprop however a duct encircles the 163 00:06:19,760 --> 00:06:22,450 turboprop however a duct encircles the fan to suppress noise generated by the 164 00:06:22,450 --> 00:06:22,460 fan to suppress noise generated by the 165 00:06:22,460 --> 00:06:30,140 fan to suppress noise generated by the airfoil 166 00:06:30,140 --> 00:06:30,150 167 00:06:30,150 --> 00:06:33,300 researchers discuss a primary focus of 168 00:06:33,300 --> 00:06:33,310 researchers discuss a primary focus of 169 00:06:33,310 --> 00:06:41,250 researchers discuss a primary focus of this ADP testing acoustics 170 00:06:41,250 --> 00:06:41,260 171 00:06:41,260 --> 00:06:44,340 various Inlet and spinner configurations 172 00:06:44,340 --> 00:06:44,350 various Inlet and spinner configurations 173 00:06:44,350 --> 00:06:46,890 various Inlet and spinner configurations were tested in the eighth by six to help 174 00:06:46,890 --> 00:06:46,900 were tested in the eighth by six to help 175 00:06:46,900 --> 00:06:49,230 were tested in the eighth by six to help determine aircraft noise affecting 176 00:06:49,230 --> 00:06:49,240 determine aircraft noise affecting 177 00:06:49,240 --> 00:06:52,140 determine aircraft noise affecting communities cabin noise affecting 178 00:06:52,140 --> 00:06:52,150 communities cabin noise affecting 179 00:06:52,150 --> 00:06:58,760 communities cabin noise affecting passengers is also a consideration 180 00:06:58,760 --> 00:06:58,770 181 00:06:58,770 --> 00:07:02,220 twelve microphones for these tests were 182 00:07:02,220 --> 00:07:02,230 twelve microphones for these tests were 183 00:07:02,230 --> 00:07:04,020 twelve microphones for these tests were mounted on a one-inch thick aluminum 184 00:07:04,020 --> 00:07:04,030 mounted on a one-inch thick aluminum 185 00:07:04,030 --> 00:07:07,620 mounted on a one-inch thick aluminum plate and suspended above the model they 186 00:07:07,620 --> 00:07:07,630 plate and suspended above the model they 187 00:07:07,630 --> 00:07:11,480 plate and suspended above the model they are calibrated daily to ensure accuracy 188 00:07:11,480 --> 00:07:11,490 are calibrated daily to ensure accuracy 189 00:07:11,490 --> 00:07:14,430 are calibrated daily to ensure accuracy Pratt & Whitney is kept informed during 190 00:07:14,430 --> 00:07:14,440 Pratt & Whitney is kept informed during 191 00:07:14,440 --> 00:07:18,480 Pratt & Whitney is kept informed during each phase of testing pratt & whitney's 192 00:07:18,480 --> 00:07:18,490 each phase of testing pratt & whitney's 193 00:07:18,490 --> 00:07:21,420 each phase of testing pratt & whitney's interest is supervised by company vice 194 00:07:21,420 --> 00:07:21,430 interest is supervised by company vice 195 00:07:21,430 --> 00:07:25,020 interest is supervised by company vice president william webb the testing here 196 00:07:25,020 --> 00:07:25,030 president william webb the testing here 197 00:07:25,030 --> 00:07:27,600 president william webb the testing here at lewis is possible because of the wind 198 00:07:27,600 --> 00:07:27,610 at lewis is possible because of the wind 199 00:07:27,610 --> 00:07:29,160 at lewis is possible because of the wind tunnel facilities here at lewis are 200 00:07:29,160 --> 00:07:29,170 tunnel facilities here at lewis are 201 00:07:29,170 --> 00:07:31,290 tunnel facilities here at lewis are capable of doing both performance 202 00:07:31,290 --> 00:07:31,300 capable of doing both performance 203 00:07:31,300 --> 00:07:33,300 capable of doing both performance testing and noise testing with one set 204 00:07:33,300 --> 00:07:33,310 testing and noise testing with one set 205 00:07:33,310 --> 00:07:35,640 testing and noise testing with one set up not many tunnels in the United States 206 00:07:35,640 --> 00:07:35,650 up not many tunnels in the United States 207 00:07:35,650 --> 00:07:38,610 up not many tunnels in the United States are capable of doing that lewis is 208 00:07:38,610 --> 00:07:38,620 are capable of doing that lewis is 209 00:07:38,620 --> 00:07:40,440 are capable of doing that lewis is developed what we call a rotating 210 00:07:40,440 --> 00:07:40,450 developed what we call a rotating 211 00:07:40,450 --> 00:07:43,020 developed what we call a rotating microphone that lets us measure noise 212 00:07:43,020 --> 00:07:43,030 microphone that lets us measure noise 213 00:07:43,030 --> 00:07:45,320 microphone that lets us measure noise and separate the things within the 214 00:07:45,320 --> 00:07:45,330 and separate the things within the 215 00:07:45,330 --> 00:07:48,690 and separate the things within the engine that create those noise such that 216 00:07:48,690 --> 00:07:48,700 engine that create those noise such that 217 00:07:48,700 --> 00:07:50,760 engine that create those noise such that if we have one component that's creating 218 00:07:50,760 --> 00:07:50,770 if we have one component that's creating 219 00:07:50,770 --> 00:07:52,890 if we have one component that's creating an offensive signal we can then work on 220 00:07:52,890 --> 00:07:52,900 an offensive signal we can then work on 221 00:07:52,900 --> 00:07:55,080 an offensive signal we can then work on that one component and not have to waste 222 00:07:55,080 --> 00:07:55,090 that one component and not have to waste 223 00:07:55,090 --> 00:07:57,270 that one component and not have to waste our time struggling through all of the 224 00:07:57,270 --> 00:07:57,280 our time struggling through all of the 225 00:07:57,280 --> 00:08:01,430 our time struggling through all of the engine that same focused approach 226 00:08:01,430 --> 00:08:01,440 engine that same focused approach 227 00:08:01,440 --> 00:08:03,840 engine that same focused approach characterized all of the acoustic 228 00:08:03,840 --> 00:08:03,850 characterized all of the acoustic 229 00:08:03,850 --> 00:08:07,400 characterized all of the acoustic testing which included blade angles 230 00:08:07,400 --> 00:08:07,410 testing which included blade angles 231 00:08:07,410 --> 00:08:12,410 testing which included blade angles inlets and spinners stator veins and 232 00:08:12,410 --> 00:08:12,420 inlets and spinners stator veins and 233 00:08:12,420 --> 00:08:17,580 inlets and spinners stator veins and angles of attack the other primary focus 234 00:08:17,580 --> 00:08:17,590 angles of attack the other primary focus 235 00:08:17,590 --> 00:08:20,700 angles of attack the other primary focus of a DP testing was aerodynamic 236 00:08:20,700 --> 00:08:20,710 of a DP testing was aerodynamic 237 00:08:20,710 --> 00:08:23,290 of a DP testing was aerodynamic performance 238 00:08:23,290 --> 00:08:23,300 239 00:08:23,300 --> 00:08:26,020 during the past two years testing 240 00:08:26,020 --> 00:08:26,030 during the past two years testing 241 00:08:26,030 --> 00:08:28,029 during the past two years testing focused on four inlet spinner 242 00:08:28,029 --> 00:08:28,039 focused on four inlet spinner 243 00:08:28,039 --> 00:08:30,700 focused on four inlet spinner configurations and numerous blade angle 244 00:08:30,700 --> 00:08:30,710 configurations and numerous blade angle 245 00:08:30,710 --> 00:08:34,060 configurations and numerous blade angle settings mechanics were called on to 246 00:08:34,060 --> 00:08:34,070 settings mechanics were called on to 247 00:08:34,070 --> 00:08:37,769 settings mechanics were called on to make changes for each configuration 248 00:08:37,769 --> 00:08:37,779 make changes for each configuration 249 00:08:37,779 --> 00:08:40,779 make changes for each configuration hundreds of performance tests including 250 00:08:40,779 --> 00:08:40,789 hundreds of performance tests including 251 00:08:40,789 --> 00:08:42,690 hundreds of performance tests including investigation of thrust and drag 252 00:08:42,690 --> 00:08:42,700 investigation of thrust and drag 253 00:08:42,700 --> 00:08:45,870 investigation of thrust and drag resulted in thousands of test points a 254 00:08:45,870 --> 00:08:45,880 resulted in thousands of test points a 255 00:08:45,880 --> 00:08:48,970 resulted in thousands of test points a sheet laser flow test provides an image 256 00:08:48,970 --> 00:08:48,980 sheet laser flow test provides an image 257 00:08:48,980 --> 00:08:51,250 sheet laser flow test provides an image of reverse thrust necessary during 258 00:08:51,250 --> 00:08:51,260 of reverse thrust necessary during 259 00:08:51,260 --> 00:08:55,210 of reverse thrust necessary during landing the laser doppler velocimeter or 260 00:08:55,210 --> 00:08:55,220 landing the laser doppler velocimeter or 261 00:08:55,220 --> 00:08:58,420 landing the laser doppler velocimeter or LDV is a non intrusive measurement of 262 00:08:58,420 --> 00:08:58,430 LDV is a non intrusive measurement of 263 00:08:58,430 --> 00:09:01,720 LDV is a non intrusive measurement of velocity with light beams it was used to 264 00:09:01,720 --> 00:09:01,730 velocity with light beams it was used to 265 00:09:01,730 --> 00:09:05,400 velocity with light beams it was used to map the reverse thrust velocity profile 266 00:09:05,400 --> 00:09:05,410 map the reverse thrust velocity profile 267 00:09:05,410 --> 00:09:08,650 map the reverse thrust velocity profile to determine the operability of the ADP 268 00:09:08,650 --> 00:09:08,660 to determine the operability of the ADP 269 00:09:08,660 --> 00:09:11,110 to determine the operability of the ADP the model was tested at various angles 270 00:09:11,110 --> 00:09:11,120 the model was tested at various angles 271 00:09:11,120 --> 00:09:14,170 the model was tested at various angles of attack simulating takeoff and landing 272 00:09:14,170 --> 00:09:14,180 of attack simulating takeoff and landing 273 00:09:14,180 --> 00:09:21,210 of attack simulating takeoff and landing configurations 274 00:09:21,210 --> 00:09:21,220 275 00:09:21,220 --> 00:09:23,879 when modifications were necessary for a 276 00:09:23,879 --> 00:09:23,889 when modifications were necessary for a 277 00:09:23,889 --> 00:09:26,840 when modifications were necessary for a specific investigation model changes 278 00:09:26,840 --> 00:09:26,850 specific investigation model changes 279 00:09:26,850 --> 00:09:28,800 specific investigation model changes instrumentation and repairs were 280 00:09:28,800 --> 00:09:28,810 instrumentation and repairs were 281 00:09:28,810 --> 00:09:31,790 instrumentation and repairs were performed on site by Lewis experts 282 00:09:31,790 --> 00:09:31,800 performed on site by Lewis experts 283 00:09:31,800 --> 00:09:34,079 performed on site by Lewis experts minimizing any delays in the test 284 00:09:34,079 --> 00:09:34,089 minimizing any delays in the test 285 00:09:34,089 --> 00:09:40,259 minimizing any delays in the test program NASA researchers are responsible 286 00:09:40,259 --> 00:09:40,269 program NASA researchers are responsible 287 00:09:40,269 --> 00:09:42,509 program NASA researchers are responsible for accurate gathering of the real time 288 00:09:42,509 --> 00:09:42,519 for accurate gathering of the real time 289 00:09:42,519 --> 00:09:46,400 for accurate gathering of the real time data on the escort d+ computer system 290 00:09:46,400 --> 00:09:46,410 data on the escort d+ computer system 291 00:09:46,410 --> 00:09:49,740 data on the escort d+ computer system the laborious process of analyzing and 292 00:09:49,740 --> 00:09:49,750 the laborious process of analyzing and 293 00:09:49,750 --> 00:09:51,749 the laborious process of analyzing and interpreting the information will 294 00:09:51,749 --> 00:09:51,759 interpreting the information will 295 00:09:51,759 --> 00:09:55,139 interpreting the information will continue for several months researchers 296 00:09:55,139 --> 00:09:55,149 continue for several months researchers 297 00:09:55,149 --> 00:09:57,600 continue for several months researchers map a trend within the test data and 298 00:09:57,600 --> 00:09:57,610 map a trend within the test data and 299 00:09:57,610 --> 00:10:00,179 map a trend within the test data and determine engine noise and performance 300 00:10:00,179 --> 00:10:00,189 determine engine noise and performance 301 00:10:00,189 --> 00:10:03,410 determine engine noise and performance this helps to validate analytical codes 302 00:10:03,410 --> 00:10:03,420 this helps to validate analytical codes 303 00:10:03,420 --> 00:10:05,360 this helps to validate analytical codes ultimately leading to improved 304 00:10:05,360 --> 00:10:05,370 ultimately leading to improved 305 00:10:05,370 --> 00:10:08,579 ultimately leading to improved technology and design codes for future 306 00:10:08,579 --> 00:10:08,589 technology and design codes for future 307 00:10:08,589 --> 00:10:13,410 technology and design codes for future industry use our technology readiness 308 00:10:13,410 --> 00:10:13,420 industry use our technology readiness 309 00:10:13,420 --> 00:10:15,600 industry use our technology readiness development program is scheduled to run 310 00:10:15,600 --> 00:10:15,610 development program is scheduled to run 311 00:10:15,610 --> 00:10:20,309 development program is scheduled to run through 1995 we anticipate that it we 312 00:10:20,309 --> 00:10:20,319 through 1995 we anticipate that it we 313 00:10:20,319 --> 00:10:22,139 through 1995 we anticipate that it we could be ready to start the development 314 00:10:22,139 --> 00:10:22,149 could be ready to start the development 315 00:10:22,149 --> 00:10:24,900 could be ready to start the development of a commercial product in the 1994 to 316 00:10:24,900 --> 00:10:24,910 of a commercial product in the 1994 to 317 00:10:24,910 --> 00:10:28,230 of a commercial product in the 1994 to 1995 time period if the market is there 318 00:10:28,230 --> 00:10:28,240 1995 time period if the market is there 319 00:10:28,240 --> 00:10:30,449 1995 time period if the market is there that would support the cost of 320 00:10:30,449 --> 00:10:30,459 that would support the cost of 321 00:10:30,459 --> 00:10:33,090 that would support the cost of developing a new product that would let 322 00:10:33,090 --> 00:10:33,100 developing a new product that would let 323 00:10:33,100 --> 00:10:34,980 developing a new product that would let us put an engine in service that is 324 00:10:34,980 --> 00:10:34,990 us put an engine in service that is 325 00:10:34,990 --> 00:10:37,379 us put an engine in service that is carrying revenue-generating passengers 326 00:10:37,379 --> 00:10:37,389 carrying revenue-generating passengers 327 00:10:37,389 --> 00:10:41,009 carrying revenue-generating passengers around the year 2000 NASA louis's 328 00:10:41,009 --> 00:10:41,019 around the year 2000 NASA louis's 329 00:10:41,019 --> 00:10:43,350 around the year 2000 NASA louis's leading role in long-range aeronautics 330 00:10:43,350 --> 00:10:43,360 leading role in long-range aeronautics 331 00:10:43,360 --> 00:10:46,170 leading role in long-range aeronautics research consistently places the center 332 00:10:46,170 --> 00:10:46,180 research consistently places the center 333 00:10:46,180 --> 00:10:48,240 research consistently places the center at the forefront of technology 334 00:10:48,240 --> 00:10:48,250 at the forefront of technology 335 00:10:48,250 --> 00:10:52,639 at the forefront of technology development 336 00:10:52,639 --> 00:10:52,649 337 00:10:52,649 --> 00:10:57,170 as flying on the ground for the model 338 00:10:57,170 --> 00:10:57,180 as flying on the ground for the model 339 00:10:57,180 --> 00:11:00,470 as flying on the ground for the model ends the future for advanced ducted 340 00:11:00,470 --> 00:11:00,480 ends the future for advanced ducted 341 00:11:00,480 --> 00:12:14,889 ends the future for advanced ducted propulsion begins 342 00:12:14,889 --> 00:12:14,899 343 00:12:14,899 --> 00:12:16,959 you