| 41. | Descents would also be performed in a precise way to reduce sonic boom levels until subsonic speeds were reached.
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| 42. | Turbofans are usually more efficient than turbojets at subsonic speeds, but their large frontal area also generates more drag.
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| 43. | At supersonic speeds, airfoils generate lift in an entirely different manner than at subsonic speeds, and are invariably less efficient.
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| 44. | Concordes take off at subsonic speeds and do not break the speed of sound until they are over the ocean.
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| 45. | This eliminates the need for a splitter plate, while compressing the air to slow it down from supersonic to subsonic speeds.
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| 46. | This gas is then passed through the tips of the fan to provide driving power to the fan at subsonic speeds.
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| 47. | In space, the violent encounter slows the solar wind from supersonic velocity to subsonic speed, and causes a pileup of particles.
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| 48. | But at subsonic speeds, especially during takeoffs, the roar of its jet engines and after-burners made conventional jets sound like purrs.
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| 49. | The Victor was designed for flight at high subsonic speeds, although multiple instances have occurred in which the sound barrier was broken.
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| 50. | These aircraft were capable of flying at high subsonic speeds and were primarily designed for penetrating the airspace of the Soviet Union.
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