11. A Mirage III was the first Western European combat aircraft to exceed Mach 2 in horizontal flight . 12. The lighthouse's position then changes from vertical to horizontal flight , prompting the following conclusions from various onlookers: 13. On 23 July 1958, the aircraft made its first full transition from vertical flight to horizontal flight . 14. It flew in both vertical and horizontal flight modes but never achieved the transition between the two. 15. Wheeled landing gear-from a Cessna-was added to the aircraft, which went on to make horizontal flights in 1955. 16. The fans did not generate as much thrust as was hoped, and the vertical-horizontal flight transition was difficult and abrupt. 17. The first accelerating transition from vertical take-off to horizontal flight took place on its 17th sortie on March 18, 1963. 18. However, it crashed twice, and proved to generate a disappointing amount of lift, and was difficult to transition to horizontal flight . 19. The swooper dives to gather speed and then converts it to lift, to sustain a long horizontal flight above the pond. 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 .
