| 11. | A Mirage III was the first Western European combat aircraft to exceed Mach 2 in horizontal flight.
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| 12. | The lighthouse's position then changes from vertical to horizontal flight, prompting the following conclusions from various onlookers:
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| 13. | On 23 July 1958, the aircraft made its first full transition from vertical flight to horizontal flight.
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| 14. | It flew in both vertical and horizontal flight modes but never achieved the transition between the two.
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| 15. | Wheeled landing gear-from a Cessna-was added to the aircraft, which went on to make horizontal flights in 1955.
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| 16. | The fans did not generate as much thrust as was hoped, and the vertical-horizontal flight transition was difficult and abrupt.
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| 17. | The first accelerating transition from vertical take-off to horizontal flight took place on its 17th sortie on March 18, 1963.
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| 18. | However, it crashed twice, and proved to generate a disappointing amount of lift, and was difficult to transition to horizontal flight.
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| 19. | The swooper dives to gather speed and then converts it to lift, to sustain a long horizontal flight above the pond.
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| 20. | Lockheed Martin announced Sunday that its X-35B had made two vertical takeoffs and landings, separated by 35-second hovers but no horizontal flight.
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