1 00:00:19,640 --> 00:00:22,540 what might look like a step backwards is 2 00:00:22,540 --> 00:00:22,550 what might look like a step backwards is 3 00:00:22,550 --> 00:00:26,689 what might look like a step backwards is actually two giant steps forward on the 4 00:00:26,689 --> 00:00:26,699 actually two giant steps forward on the 5 00:00:26,699 --> 00:00:34,040 actually two giant steps forward on the future path of advanced aircraft engine 6 00:00:34,040 --> 00:00:34,050 7 00:00:34,050 --> 00:00:38,040 since 1941 the Lewis Research Center has 8 00:00:38,040 --> 00:00:38,050 since 1941 the Lewis Research Center has 9 00:00:38,050 --> 00:00:39,750 since 1941 the Lewis Research Center has developed an international reputation 10 00:00:39,750 --> 00:00:39,760 developed an international reputation 11 00:00:39,760 --> 00:00:42,060 developed an international reputation for its research on jet propulsion 12 00:00:42,060 --> 00:00:42,070 for its research on jet propulsion 13 00:00:42,070 --> 00:00:46,799 for its research on jet propulsion systems however in 1977 the researchers 14 00:00:46,799 --> 00:00:46,809 systems however in 1977 the researchers 15 00:00:46,809 --> 00:00:49,229 systems however in 1977 the researchers at Louis began to take a new look at the 16 00:00:49,229 --> 00:00:49,239 at Louis began to take a new look at the 17 00:00:49,239 --> 00:00:51,990 at Louis began to take a new look at the propeller their challenge was to combine 18 00:00:51,990 --> 00:00:52,000 propeller their challenge was to combine 19 00:00:52,000 --> 00:00:54,360 propeller their challenge was to combine the efficiency of the propeller with the 20 00:00:54,360 --> 00:00:54,370 the efficiency of the propeller with the 21 00:00:54,370 --> 00:00:56,880 the efficiency of the propeller with the power of the turbine engine what has 22 00:00:56,880 --> 00:00:56,890 power of the turbine engine what has 23 00:00:56,890 --> 00:01:00,630 power of the turbine engine what has evolved is ATP the advanced turboprop 24 00:01:00,630 --> 00:01:00,640 evolved is ATP the advanced turboprop 25 00:01:00,640 --> 00:01:01,579 evolved is ATP the advanced turboprop project 26 00:01:01,579 --> 00:01:01,589 project 27 00:01:01,589 --> 00:01:04,350 project Keith severs manager of the NASA 28 00:01:04,350 --> 00:01:04,360 Keith severs manager of the NASA 29 00:01:04,360 --> 00:01:07,020 Keith severs manager of the NASA advanced turboprop project office at the 30 00:01:07,020 --> 00:01:07,030 advanced turboprop project office at the 31 00:01:07,030 --> 00:01:09,480 advanced turboprop project office at the Lewis Research Center back after World 32 00:01:09,480 --> 00:01:09,490 Lewis Research Center back after World 33 00:01:09,490 --> 00:01:12,600 Lewis Research Center back after World War two jets for the thing the coming 34 00:01:12,600 --> 00:01:12,610 War two jets for the thing the coming 35 00:01:12,610 --> 00:01:14,820 War two jets for the thing the coming thing her powers were very efficient in 36 00:01:14,820 --> 00:01:14,830 thing her powers were very efficient in 37 00:01:14,830 --> 00:01:17,430 thing her powers were very efficient in those days but they couldn't go fast it 38 00:01:17,430 --> 00:01:17,440 those days but they couldn't go fast it 39 00:01:17,440 --> 00:01:20,430 those days but they couldn't go fast it couldn't go to high altitudes and quite 40 00:01:20,430 --> 00:01:20,440 couldn't go to high altitudes and quite 41 00:01:20,440 --> 00:01:23,040 couldn't go to high altitudes and quite frankly they were not jazzy like jet 42 00:01:23,040 --> 00:01:23,050 frankly they were not jazzy like jet 43 00:01:23,050 --> 00:01:24,960 frankly they were not jazzy like jet engines and which gave way them to 44 00:01:24,960 --> 00:01:24,970 engines and which gave way them to 45 00:01:24,970 --> 00:01:27,060 engines and which gave way them to turbofan engines and high bypass ratio 46 00:01:27,060 --> 00:01:27,070 turbofan engines and high bypass ratio 47 00:01:27,070 --> 00:01:29,940 turbofan engines and high bypass ratio engines and when fuel was cheap people 48 00:01:29,940 --> 00:01:29,950 engines and when fuel was cheap people 49 00:01:29,950 --> 00:01:31,919 engines and when fuel was cheap people didn't worry much about it 10 cents a 50 00:01:31,919 --> 00:01:31,929 didn't worry much about it 10 cents a 51 00:01:31,929 --> 00:01:34,499 didn't worry much about it 10 cents a gallon as long as they get speed high 52 00:01:34,499 --> 00:01:34,509 gallon as long as they get speed high 53 00:01:34,509 --> 00:01:36,899 gallon as long as they get speed high altitude capability which the air 54 00:01:36,899 --> 00:01:36,909 altitude capability which the air 55 00:01:36,909 --> 00:01:39,359 altitude capability which the air transport system required propellers 56 00:01:39,359 --> 00:01:39,369 transport system required propellers 57 00:01:39,369 --> 00:01:42,240 transport system required propellers just kind of withered on the vine for 20 58 00:01:42,240 --> 00:01:42,250 just kind of withered on the vine for 20 59 00:01:42,250 --> 00:01:45,510 just kind of withered on the vine for 20 or 30 years the Arab oil embargo of the 60 00:01:45,510 --> 00:01:45,520 or 30 years the Arab oil embargo of the 61 00:01:45,520 --> 00:01:47,819 or 30 years the Arab oil embargo of the early 70s not only hit American 62 00:01:47,819 --> 00:01:47,829 early 70s not only hit American 63 00:01:47,829 --> 00:01:50,340 early 70s not only hit American consumers at the corner gas station but 64 00:01:50,340 --> 00:01:50,350 consumers at the corner gas station but 65 00:01:50,350 --> 00:01:52,620 consumers at the corner gas station but was also reflected at the airline ticket 66 00:01:52,620 --> 00:01:52,630 was also reflected at the airline ticket 67 00:01:52,630 --> 00:01:54,990 was also reflected at the airline ticket counter due to the soaring price of jet 68 00:01:54,990 --> 00:01:55,000 counter due to the soaring price of jet 69 00:01:55,000 --> 00:01:59,550 counter due to the soaring price of jet fuel in 1973 the price of a gallon of 70 00:01:59,550 --> 00:01:59,560 fuel in 1973 the price of a gallon of 71 00:01:59,560 --> 00:02:02,370 fuel in 1973 the price of a gallon of jet fuel was 12 cents and represented 72 00:02:02,370 --> 00:02:02,380 jet fuel was 12 cents and represented 73 00:02:02,380 --> 00:02:04,590 jet fuel was 12 cents and represented one-quarter of the direct operating cost 74 00:02:04,590 --> 00:02:04,600 one-quarter of the direct operating cost 75 00:02:04,600 --> 00:02:08,310 one-quarter of the direct operating cost of the jet by 1979 the price had risen 76 00:02:08,310 --> 00:02:08,320 of the jet by 1979 the price had risen 77 00:02:08,320 --> 00:02:11,699 of the jet by 1979 the price had risen to 63 cents a gallon and represented 78 00:02:11,699 --> 00:02:11,709 to 63 cents a gallon and represented 79 00:02:11,709 --> 00:02:14,310 to 63 cents a gallon and represented half of the direct operating cost in 80 00:02:14,310 --> 00:02:14,320 half of the direct operating cost in 81 00:02:14,320 --> 00:02:17,759 half of the direct operating cost in 1981 the cost of jet fuel was over a 82 00:02:17,759 --> 00:02:17,769 1981 the cost of jet fuel was over a 83 00:02:17,769 --> 00:02:20,490 1981 the cost of jet fuel was over a dollar eight cents a gallon with the 84 00:02:20,490 --> 00:02:20,500 dollar eight cents a gallon with the 85 00:02:20,500 --> 00:02:23,310 dollar eight cents a gallon with the rising fuel prices a fuel efficient 86 00:02:23,310 --> 00:02:23,320 rising fuel prices a fuel efficient 87 00:02:23,320 --> 00:02:25,530 rising fuel prices a fuel efficient propeller engine again became the object 88 00:02:25,530 --> 00:02:25,540 propeller engine again became the object 89 00:02:25,540 --> 00:02:27,660 propeller engine again became the object of an aeronautical propulsion research 90 00:02:27,660 --> 00:02:27,670 of an aeronautical propulsion research 91 00:02:27,670 --> 00:02:31,199 of an aeronautical propulsion research effort the researchers objectives were 92 00:02:31,199 --> 00:02:31,209 effort the researchers objectives were 93 00:02:31,209 --> 00:02:34,470 effort the researchers objectives were to develop a powerplant that would be 94 00:02:34,470 --> 00:02:34,480 to develop a powerplant that would be 95 00:02:34,480 --> 00:02:38,780 to develop a powerplant that would be fuel efficient dew point eight mach 96 00:02:38,780 --> 00:02:38,790 fuel efficient dew point eight mach 97 00:02:38,790 --> 00:02:44,129 fuel efficient dew point eight mach cruise at 35,000 feet operate at a 98 00:02:44,129 --> 00:02:44,139 cruise at 35,000 feet operate at a 99 00:02:44,139 --> 00:02:45,990 cruise at 35,000 feet operate at a reduced noise level 100 00:02:45,990 --> 00:02:46,000 reduced noise level 101 00:02:46,000 --> 00:02:47,640 reduced noise level these propellers look a lot different 102 00:02:47,640 --> 00:02:47,650 these propellers look a lot different 103 00:02:47,650 --> 00:02:49,200 these propellers look a lot different there are very highly swept they're very 104 00:02:49,200 --> 00:02:49,210 there are very highly swept they're very 105 00:02:49,210 --> 00:02:51,480 there are very highly swept they're very thin compared to old propellers and the 106 00:02:51,480 --> 00:02:51,490 thin compared to old propellers and the 107 00:02:51,490 --> 00:02:53,490 thin compared to old propellers and the thing it hits you first is they're eight 108 00:02:53,490 --> 00:02:53,500 thing it hits you first is they're eight 109 00:02:53,500 --> 00:02:56,430 thing it hits you first is they're eight to ten blades on these are rather than 110 00:02:56,430 --> 00:02:56,440 to ten blades on these are rather than 111 00:02:56,440 --> 00:02:57,960 to ten blades on these are rather than three or four is that you've been 112 00:02:57,960 --> 00:02:57,970 three or four is that you've been 113 00:02:57,970 --> 00:03:00,840 three or four is that you've been accustomed to in the past and what the 114 00:03:00,840 --> 00:03:00,850 accustomed to in the past and what the 115 00:03:00,850 --> 00:03:02,760 accustomed to in the past and what the sweep doesn't in the propeller end of 116 00:03:02,760 --> 00:03:02,770 sweep doesn't in the propeller end of 117 00:03:02,770 --> 00:03:05,430 sweep doesn't in the propeller end of finis is is to reduce the drag losses at 118 00:03:05,430 --> 00:03:05,440 finis is is to reduce the drag losses at 119 00:03:05,440 --> 00:03:07,080 finis is is to reduce the drag losses at the higher tip speeds and higher Mach 120 00:03:07,080 --> 00:03:07,090 the higher tip speeds and higher Mach 121 00:03:07,090 --> 00:03:09,420 the higher tip speeds and higher Mach numbers also helps to reduce the source 122 00:03:09,420 --> 00:03:09,430 numbers also helps to reduce the source 123 00:03:09,430 --> 00:03:12,870 numbers also helps to reduce the source noise of the propellers the higher blade 124 00:03:12,870 --> 00:03:12,880 noise of the propellers the higher blade 125 00:03:12,880 --> 00:03:14,790 noise of the propellers the higher blade count and we've loaded these blades up 126 00:03:14,790 --> 00:03:14,800 count and we've loaded these blades up 127 00:03:14,800 --> 00:03:17,070 count and we've loaded these blades up much higher than old propellers so we 128 00:03:17,070 --> 00:03:17,080 much higher than old propellers so we 129 00:03:17,080 --> 00:03:18,870 much higher than old propellers so we get a lot more power at a lot smaller 130 00:03:18,870 --> 00:03:18,880 get a lot more power at a lot smaller 131 00:03:18,880 --> 00:03:21,540 get a lot more power at a lot smaller diameter and this saves weight on the 132 00:03:21,540 --> 00:03:21,550 diameter and this saves weight on the 133 00:03:21,550 --> 00:03:23,490 diameter and this saves weight on the propeller say it's weight on the engine 134 00:03:23,490 --> 00:03:23,500 propeller say it's weight on the engine 135 00:03:23,500 --> 00:03:25,979 propeller say it's weight on the engine and it also packages better on the 136 00:03:25,979 --> 00:03:25,989 and it also packages better on the 137 00:03:25,989 --> 00:03:28,800 and it also packages better on the aircraft earlier two turbo props were 138 00:03:28,800 --> 00:03:28,810 aircraft earlier two turbo props were 139 00:03:28,810 --> 00:03:33,570 aircraft earlier two turbo props were limited both in horsepower and in flight 140 00:03:33,570 --> 00:03:33,580 limited both in horsepower and in flight 141 00:03:33,580 --> 00:03:36,420 limited both in horsepower and in flight speed mainly because of the 142 00:03:36,420 --> 00:03:36,430 speed mainly because of the 143 00:03:36,430 --> 00:03:38,940 speed mainly because of the compressibility effects that occur at 144 00:03:38,940 --> 00:03:38,950 compressibility effects that occur at 145 00:03:38,950 --> 00:03:44,220 compressibility effects that occur at the propeller tips with the recent 146 00:03:44,220 --> 00:03:44,230 the propeller tips with the recent 147 00:03:44,230 --> 00:03:46,770 the propeller tips with the recent advances in computer design technology 148 00:03:46,770 --> 00:03:46,780 advances in computer design technology 149 00:03:46,780 --> 00:03:49,290 advances in computer design technology we are now able to optimize the blade 150 00:03:49,290 --> 00:03:49,300 we are now able to optimize the blade 151 00:03:49,300 --> 00:03:52,289 we are now able to optimize the blade shape to minimize the compressibility 152 00:03:52,289 --> 00:03:52,299 shape to minimize the compressibility 153 00:03:52,299 --> 00:03:54,680 shape to minimize the compressibility effects occurring at the blade tips 154 00:03:54,680 --> 00:03:54,690 effects occurring at the blade tips 155 00:03:54,690 --> 00:03:57,900 effects occurring at the blade tips allowing the planes to fly faster up to 156 00:03:57,900 --> 00:03:57,910 allowing the planes to fly faster up to 157 00:03:57,910 --> 00:04:01,199 allowing the planes to fly faster up to six hundred miles an hour and at higher 158 00:04:01,199 --> 00:04:01,209 six hundred miles an hour and at higher 159 00:04:01,209 --> 00:04:04,680 six hundred miles an hour and at higher altitudes up to 35,000 feet as you 160 00:04:04,680 --> 00:04:04,690 altitudes up to 35,000 feet as you 161 00:04:04,690 --> 00:04:08,789 altitudes up to 35,000 feet as you approach the speed of sound you run into 162 00:04:08,789 --> 00:04:08,799 approach the speed of sound you run into 163 00:04:08,799 --> 00:04:11,400 approach the speed of sound you run into a problem where the apparent pressure 164 00:04:11,400 --> 00:04:11,410 a problem where the apparent pressure 165 00:04:11,410 --> 00:04:13,500 a problem where the apparent pressure that you're trying to push through 166 00:04:13,500 --> 00:04:13,510 that you're trying to push through 167 00:04:13,510 --> 00:04:17,090 that you're trying to push through suddenly takes a quantum leap and 168 00:04:17,090 --> 00:04:17,100 suddenly takes a quantum leap and 169 00:04:17,100 --> 00:04:20,699 suddenly takes a quantum leap and because the blades are very large in 170 00:04:20,699 --> 00:04:20,709 because the blades are very large in 171 00:04:20,709 --> 00:04:25,230 because the blades are very large in diameter to 13 feet in diameter the tip 172 00:04:25,230 --> 00:04:25,240 diameter to 13 feet in diameter the tip 173 00:04:25,240 --> 00:04:30,030 diameter to 13 feet in diameter the tip speed is upwards of 800 feet per second 174 00:04:30,030 --> 00:04:30,040 speed is upwards of 800 feet per second 175 00:04:30,040 --> 00:04:34,950 speed is upwards of 800 feet per second which is just under Mach 1 or the speed 176 00:04:34,950 --> 00:04:34,960 which is just under Mach 1 or the speed 177 00:04:34,960 --> 00:04:37,110 which is just under Mach 1 or the speed of sound as you try to push through that 178 00:04:37,110 --> 00:04:37,120 of sound as you try to push through that 179 00:04:37,120 --> 00:04:41,130 of sound as you try to push through that Mach 1 range you run into this 180 00:04:41,130 --> 00:04:41,140 Mach 1 range you run into this 181 00:04:41,140 --> 00:04:43,380 Mach 1 range you run into this compressibility factor it's almost like 182 00:04:43,380 --> 00:04:43,390 compressibility factor it's almost like 183 00:04:43,390 --> 00:04:45,240 compressibility factor it's almost like running into a brick wall with the blade 184 00:04:45,240 --> 00:04:45,250 running into a brick wall with the blade 185 00:04:45,250 --> 00:04:47,490 running into a brick wall with the blade the blade construction is now a 186 00:04:47,490 --> 00:04:47,500 the blade construction is now a 187 00:04:47,500 --> 00:04:49,620 the blade construction is now a composite type arrangement where you 188 00:04:49,620 --> 00:04:49,630 composite type arrangement where you 189 00:04:49,630 --> 00:04:52,020 composite type arrangement where you have a metallic leading edge such as 190 00:04:52,020 --> 00:04:52,030 have a metallic leading edge such as 191 00:04:52,030 --> 00:04:54,930 have a metallic leading edge such as aluminum and a graphite epoxy resign'd 192 00:04:54,930 --> 00:04:54,940 aluminum and a graphite epoxy resign'd 193 00:04:54,940 --> 00:04:57,180 aluminum and a graphite epoxy resign'd internal construction that allows the 194 00:04:57,180 --> 00:04:57,190 internal construction that allows the 195 00:04:57,190 --> 00:04:59,559 internal construction that allows the blades to be very lightweight and 196 00:04:59,559 --> 00:04:59,569 blades to be very lightweight and 197 00:04:59,569 --> 00:05:01,779 blades to be very lightweight and cause they're lighter weight minimizes 198 00:05:01,779 --> 00:05:01,789 cause they're lighter weight minimizes 199 00:05:01,789 --> 00:05:03,820 cause they're lighter weight minimizes the centrifugal stresses that occur when 200 00:05:03,820 --> 00:05:03,830 the centrifugal stresses that occur when 201 00:05:03,830 --> 00:05:05,709 the centrifugal stresses that occur when the propeller system is rotated at 202 00:05:05,709 --> 00:05:05,719 the propeller system is rotated at 203 00:05:05,719 --> 00:05:09,239 the propeller system is rotated at 12,000 rpm ultimate goal is to save fuel 204 00:05:09,239 --> 00:05:09,249 12,000 rpm ultimate goal is to save fuel 205 00:05:09,249 --> 00:05:11,889 12,000 rpm ultimate goal is to save fuel commercial aircraft and also military 206 00:05:11,889 --> 00:05:11,899 commercial aircraft and also military 207 00:05:11,899 --> 00:05:15,159 commercial aircraft and also military aircraft were it can be applied and this 208 00:05:15,159 --> 00:05:15,169 aircraft were it can be applied and this 209 00:05:15,169 --> 00:05:17,290 aircraft were it can be applied and this fuel saving is very dramatic compared to 210 00:05:17,290 --> 00:05:17,300 fuel saving is very dramatic compared to 211 00:05:17,300 --> 00:05:20,070 fuel saving is very dramatic compared to the fuel burn that aircraft have today 212 00:05:20,070 --> 00:05:20,080 the fuel burn that aircraft have today 213 00:05:20,080 --> 00:05:24,059 the fuel burn that aircraft have today such as a 727 737 that type of air cream 214 00:05:24,059 --> 00:05:24,069 such as a 727 737 that type of air cream 215 00:05:24,069 --> 00:05:27,609 such as a 727 737 that type of air cream aircraft a prop van driven airplane can 216 00:05:27,609 --> 00:05:27,619 aircraft a prop van driven airplane can 217 00:05:27,619 --> 00:05:30,219 aircraft a prop van driven airplane can do the same mission that like forty to 218 00:05:30,219 --> 00:05:30,229 do the same mission that like forty to 219 00:05:30,229 --> 00:05:32,199 do the same mission that like forty to fifty percent of the fuel that they use 220 00:05:32,199 --> 00:05:32,209 fifty percent of the fuel that they use 221 00:05:32,209 --> 00:05:35,790 fifty percent of the fuel that they use today if you look at just the u.s. fleet 222 00:05:35,790 --> 00:05:35,800 today if you look at just the u.s. fleet 223 00:05:35,800 --> 00:05:38,980 today if you look at just the u.s. fleet existing today for medium to short range 224 00:05:38,980 --> 00:05:38,990 existing today for medium to short range 225 00:05:38,990 --> 00:05:42,909 existing today for medium to short range aircraft I'm talking 727 737 is dc-9s 226 00:05:42,909 --> 00:05:42,919 aircraft I'm talking 727 737 is dc-9s 227 00:05:42,919 --> 00:05:46,269 aircraft I'm talking 727 737 is dc-9s md-80s those aircraft in a typical year 228 00:05:46,269 --> 00:05:46,279 md-80s those aircraft in a typical year 229 00:05:46,279 --> 00:05:49,510 md-80s those aircraft in a typical year burn about 5 billion gallons of fuel if 230 00:05:49,510 --> 00:05:49,520 burn about 5 billion gallons of fuel if 231 00:05:49,520 --> 00:05:52,989 burn about 5 billion gallons of fuel if these aircrafts were equipped with pop 232 00:05:52,989 --> 00:05:52,999 these aircrafts were equipped with pop 233 00:05:52,999 --> 00:05:54,879 these aircrafts were equipped with pop fans they could do the same mission 234 00:05:54,879 --> 00:05:54,889 fans they could do the same mission 235 00:05:54,889 --> 00:05:57,279 fans they could do the same mission they're doing today and save two to two 236 00:05:57,279 --> 00:05:57,289 they're doing today and save two to two 237 00:05:57,289 --> 00:05:58,749 they're doing today and save two to two and a half billion gallons of fuel per 238 00:05:58,749 --> 00:05:58,759 and a half billion gallons of fuel per 239 00:05:58,759 --> 00:06:08,309 and a half billion gallons of fuel per year 240 00:06:08,309 --> 00:06:08,319 241 00:06:08,319 --> 00:06:10,379 propeller-driven airplanes have 242 00:06:10,379 --> 00:06:10,389 propeller-driven airplanes have 243 00:06:10,389 --> 00:06:12,629 propeller-driven airplanes have traditionally been noisy advanced 244 00:06:12,629 --> 00:06:12,639 traditionally been noisy advanced 245 00:06:12,639 --> 00:06:15,149 traditionally been noisy advanced turboprop researchers are tackling the 246 00:06:15,149 --> 00:06:15,159 turboprop researchers are tackling the 247 00:06:15,159 --> 00:06:16,920 turboprop researchers are tackling the problem of trying to build a turboprop 248 00:06:16,920 --> 00:06:16,930 problem of trying to build a turboprop 249 00:06:16,930 --> 00:06:19,559 problem of trying to build a turboprop to rival the relative quiet and 250 00:06:19,559 --> 00:06:19,569 to rival the relative quiet and 251 00:06:19,569 --> 00:06:22,950 to rival the relative quiet and smoothness of the ship well we've had to 252 00:06:22,950 --> 00:06:22,960 smoothness of the ship well we've had to 253 00:06:22,960 --> 00:06:24,959 smoothness of the ship well we've had to look at the entire aircraft as a system 254 00:06:24,959 --> 00:06:24,969 look at the entire aircraft as a system 255 00:06:24,969 --> 00:06:26,670 look at the entire aircraft as a system we didn't look just at sticking a new 256 00:06:26,670 --> 00:06:26,680 we didn't look just at sticking a new 257 00:06:26,680 --> 00:06:29,219 we didn't look just at sticking a new widget called a prop fan on them better 258 00:06:29,219 --> 00:06:29,229 widget called a prop fan on them better 259 00:06:29,229 --> 00:06:30,839 widget called a prop fan on them better look at what to do they do to the rest 260 00:06:30,839 --> 00:06:30,849 look at what to do they do to the rest 261 00:06:30,849 --> 00:06:32,999 look at what to do they do to the rest of the aircraft and particularly we're 262 00:06:32,999 --> 00:06:33,009 of the aircraft and particularly we're 263 00:06:33,009 --> 00:06:35,219 of the aircraft and particularly we're concerned about passenger comfort it 264 00:06:35,219 --> 00:06:35,229 concerned about passenger comfort it 265 00:06:35,229 --> 00:06:37,049 concerned about passenger comfort it doesn't matter how much fuel was saved 266 00:06:37,049 --> 00:06:37,059 doesn't matter how much fuel was saved 267 00:06:37,059 --> 00:06:39,570 doesn't matter how much fuel was saved if people don't like it or they're 268 00:06:39,570 --> 00:06:39,580 if people don't like it or they're 269 00:06:39,580 --> 00:06:43,049 if people don't like it or they're uncomfortable sound vibration and 270 00:06:43,049 --> 00:06:43,059 uncomfortable sound vibration and 271 00:06:43,059 --> 00:06:44,070 uncomfortable sound vibration and they're not going to write it so it 272 00:06:44,070 --> 00:06:44,080 they're not going to write it so it 273 00:06:44,080 --> 00:06:46,350 they're not going to write it so it won't matter so part of our project goal 274 00:06:46,350 --> 00:06:46,360 won't matter so part of our project goal 275 00:06:46,360 --> 00:06:49,079 won't matter so part of our project goal is to to make sure that people have the 276 00:06:49,079 --> 00:06:49,089 is to to make sure that people have the 277 00:06:49,089 --> 00:06:50,549 is to to make sure that people have the same comfort that they're used to on 278 00:06:50,549 --> 00:06:50,559 same comfort that they're used to on 279 00:06:50,559 --> 00:06:53,239 same comfort that they're used to on today's wide-body aircraft in addition 280 00:06:53,239 --> 00:06:53,249 today's wide-body aircraft in addition 281 00:06:53,249 --> 00:06:55,499 today's wide-body aircraft in addition we're concerned about community noise 282 00:06:55,499 --> 00:06:55,509 we're concerned about community noise 283 00:06:55,509 --> 00:06:57,209 we're concerned about community noise these things are allowed and we have to 284 00:06:57,209 --> 00:06:57,219 these things are allowed and we have to 285 00:06:57,219 --> 00:06:58,739 these things are allowed and we have to provide the technology sort of the 286 00:06:58,739 --> 00:06:58,749 provide the technology sort of the 287 00:06:58,749 --> 00:07:01,529 provide the technology sort of the equivalent existing far 36-yard stage 288 00:07:01,529 --> 00:07:01,539 equivalent existing far 36-yard stage 289 00:07:01,539 --> 00:07:04,740 equivalent existing far 36-yard stage three regulate 290 00:07:04,740 --> 00:07:04,750 three regulate 291 00:07:04,750 --> 00:07:18,680 by around airports and communities 292 00:07:18,680 --> 00:07:18,690 293 00:07:18,690 --> 00:07:20,879 most the time we really don't even know 294 00:07:20,879 --> 00:07:20,889 most the time we really don't even know 295 00:07:20,889 --> 00:07:22,620 most the time we really don't even know what's running inside the cockpit it's 296 00:07:22,620 --> 00:07:22,630 what's running inside the cockpit it's 297 00:07:22,630 --> 00:07:25,409 what's running inside the cockpit it's that quiet and we're only what 15 feet 298 00:07:25,409 --> 00:07:25,419 that quiet and we're only what 15 feet 299 00:07:25,419 --> 00:07:27,930 that quiet and we're only what 15 feet away from after several years of wind 300 00:07:27,930 --> 00:07:27,940 away from after several years of wind 301 00:07:27,940 --> 00:07:30,689 away from after several years of wind tunnel and static engine testing a full 302 00:07:30,689 --> 00:07:30,699 tunnel and static engine testing a full 303 00:07:30,699 --> 00:07:32,580 tunnel and static engine testing a full flight test of the advanced propeller 304 00:07:32,580 --> 00:07:32,590 flight test of the advanced propeller 305 00:07:32,590 --> 00:07:36,210 flight test of the advanced propeller system was held on May 19 1987 at 306 00:07:36,210 --> 00:07:36,220 system was held on May 19 1987 at 307 00:07:36,220 --> 00:07:38,850 system was held on May 19 1987 at Lockheed Georgia company in Marietta 308 00:07:38,850 --> 00:07:38,860 Lockheed Georgia company in Marietta 309 00:07:38,860 --> 00:07:41,610 Lockheed Georgia company in Marietta Georgia so far operation has been very 310 00:07:41,610 --> 00:07:41,620 Georgia so far operation has been very 311 00:07:41,620 --> 00:07:44,700 Georgia so far operation has been very good everything is about as predicted 312 00:07:44,700 --> 00:07:44,710 good everything is about as predicted 313 00:07:44,710 --> 00:07:47,820 good everything is about as predicted that the engineers had predicted from 314 00:07:47,820 --> 00:07:47,830 that the engineers had predicted from 315 00:07:47,830 --> 00:07:49,520 that the engineers had predicted from their initial assessment of the program 316 00:07:49,520 --> 00:07:49,530 their initial assessment of the program 317 00:07:49,530 --> 00:07:51,990 their initial assessment of the program we haven't really had any big surprises 318 00:07:51,990 --> 00:07:52,000 we haven't really had any big surprises 319 00:07:52,000 --> 00:07:56,010 we haven't really had any big surprises I should say when you pull the prop fan 320 00:07:56,010 --> 00:07:56,020 I should say when you pull the prop fan 321 00:07:56,020 --> 00:07:58,980 I should say when you pull the prop fan in and add power to it the pilot really 322 00:07:58,980 --> 00:07:58,990 in and add power to it the pilot really 323 00:07:58,990 --> 00:08:01,230 in and add power to it the pilot really knows it but there again this airplane 324 00:08:01,230 --> 00:08:01,240 knows it but there again this airplane 325 00:08:01,240 --> 00:08:02,939 knows it but there again this airplane wasn't really designed to fly with an 326 00:08:02,939 --> 00:08:02,949 wasn't really designed to fly with an 327 00:08:02,949 --> 00:08:05,969 wasn't really designed to fly with an engine out on a on the left wing but 328 00:08:05,969 --> 00:08:05,979 engine out on a on the left wing but 329 00:08:05,979 --> 00:08:08,879 engine out on a on the left wing but again what our engineers predicted is 330 00:08:08,879 --> 00:08:08,889 again what our engineers predicted is 331 00:08:08,889 --> 00:08:09,960 again what our engineers predicted is pretty much what's happening with the 332 00:08:09,960 --> 00:08:09,970 pretty much what's happening with the 333 00:08:09,970 --> 00:08:12,029 pretty much what's happening with the airplane so I'd have to say so far it 334 00:08:12,029 --> 00:08:12,039 airplane so I'd have to say so far it 335 00:08:12,039 --> 00:08:14,640 airplane so I'd have to say so far it looks good so far it looks very good if 336 00:08:14,640 --> 00:08:14,650 looks good so far it looks very good if 337 00:08:14,650 --> 00:08:17,279 looks good so far it looks very good if all goes to plan prop fans will probably 338 00:08:17,279 --> 00:08:17,289 all goes to plan prop fans will probably 339 00:08:17,289 --> 00:08:19,560 all goes to plan prop fans will probably be fitted on short to medium range 340 00:08:19,560 --> 00:08:19,570 be fitted on short to medium range 341 00:08:19,570 --> 00:08:22,980 be fitted on short to medium range aircraft we hope to have as a part of 342 00:08:22,980 --> 00:08:22,990 aircraft we hope to have as a part of 343 00:08:22,990 --> 00:08:25,650 aircraft we hope to have as a part of the project goal to have a technology in 344 00:08:25,650 --> 00:08:25,660 the project goal to have a technology in 345 00:08:25,660 --> 00:08:29,010 the project goal to have a technology in hand by the end of 1980s so that 346 00:08:29,010 --> 00:08:29,020 hand by the end of 1980s so that 347 00:08:29,020 --> 00:08:31,770 hand by the end of 1980s so that industry the engine people the aircraft 348 00:08:31,770 --> 00:08:31,780 industry the engine people the aircraft 349 00:08:31,780 --> 00:08:33,540 industry the engine people the aircraft people can make marketing decisions 350 00:08:33,540 --> 00:08:33,550 people can make marketing decisions 351 00:08:33,550 --> 00:08:36,510 people can make marketing decisions because it involves a lot of private 352 00:08:36,510 --> 00:08:36,520 because it involves a lot of private 353 00:08:36,520 --> 00:08:39,000 because it involves a lot of private capital that's a make sure breaks our 354 00:08:39,000 --> 00:08:39,010 capital that's a make sure breaks our 355 00:08:39,010 --> 00:08:42,079 capital that's a make sure breaks our company so the way things are proceeding 356 00:08:42,079 --> 00:08:42,089 company so the way things are proceeding 357 00:08:42,089 --> 00:08:45,600 company so the way things are proceeding right now it looks like Boeing and 358 00:08:45,600 --> 00:08:45,610 right now it looks like Boeing and 359 00:08:45,610 --> 00:08:48,060 right now it looks like Boeing and McDonnell Douglas are aiming for new 360 00:08:48,060 --> 00:08:48,070 McDonnell Douglas are aiming for new 361 00:08:48,070 --> 00:08:50,310 McDonnell Douglas are aiming for new aircraft injuries so with prop vans in 362 00:08:50,310 --> 00:08:50,320 aircraft injuries so with prop vans in 363 00:08:50,320 --> 00:08:59,680 aircraft injuries so with prop vans in say the 1991 92 93 timeframe 364 00:08:59,680 --> 00:08:59,690 365 00:08:59,690 --> 00:09:01,750 you