de Havilland Comet Srs. 1-4 by Philip Birtles

By Philip Birtles

;de Havilland Comet Srs. 1-4 [Aircraft Profile 108] КНИГИ ;ВОЕННАЯ ИСТОРИЯ Название:de Havilland Comet Srs. 1-4 Автор: P.J.Birtles Серия: airplane Profile 108 Издательство: Profile guides Ltd Год издания: 1966 Страниц:16 Формат: PDF в rarЯзык: английский Размер: 11.59 Мб Для сайта: Мир книгde Havilland DH.106 Comet был одним из первых в мире реактивным пассажирским самолётом. Он первым разрабатывался именно в качестве пассажирской реактивной машины, и стал первым, начав коммерческие полёты, опередив ближайших конкурентов более чем на четыре года. На базе самолета создан морской разведывательный самолет Nimrod, до сих пор стоящий на вооружении zero

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Abe Silverstein had in mind a different set of priorities when he looked at the rugged job NASA had ahead of it-managing an affordable but worthwhile national space program. He wanted JPL to be a part of NASA, to participate from the inside. He accepted the need for long-range planning, but NASA had to concentrate on the short run, on the creation of missions that would build congressional confidence so that legislators would support more ambitious projects for the years ahead. As a result, Silverstein was concerned with a different timetable, a launch and planning schedule for 1959.

The JPL group was reminded, however, that the planetary program would be relying on the yet-to-be-developed Centaur launch vehicle for some time, until the more advanced Saturn family was ready. 13 Surveyor, Mariner, and the Centaur As headquarters directed, JPL personnel set about defining a lunar impact mission, but Atlas-Centaurboosted spacecraft of the future were also an active concern. NASA hoped Surveyor, the first of these advanced craft, would allow a "tremendous stride forward in lunar exploration," since it would land **** softly on the moon, carrying a number of experiments, [31] including a surface sampler and an atmosphere analyzer.

According to the estimates, the combination would be able to place 2250 kilograms in a 480-kilometer Earth orbit or send approximately 360 kilograms to the moon. The first Atlas-Vega flight was optimistically scheduled for the fall of 1960. On 17 December 1958 in Washington, representatives from NASA, the Advanced Research Projects Agency, the Army, and the Air Force considered launch vehicle development and agreed that a series of versatile, increasingly powerful launchers was a desirable goal.

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