| 21. | Pellets are designed to travel at subsonic speeds.
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| 22. | Other work examined the problem of compressibility at high subsonic speeds, known as the Prandtl-Glauert correction.
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| 23. | The plane returned to Heathrow at subsonic speed.
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| 24. | The plane, piloted by an Air France team, carried no passengers and flew at subsonic speed.
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| 25. | The bomber itself will fly at subsonic speeds.
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| 26. | A continuous wind tunnel is driven by large fans and typically is only capable of subsonic speeds.
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| 27. | At subsonic speeds, the aircraft guzzles fuel.
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| 28. | Air France, which has conducted Concorde test flights at subsonic speeds, hopes to fly again by autumn.
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| 29. | Manned space vehicles must be slowed to subsonic speeds before parachutes or air brakes may be deployed.
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| 30. | The jet raced into foggy skies with a deafening roar and flew without passengers at subsonic speed.
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