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Project Manhigh : ウィキペディア英語版
Project Manhigh

Project Manhigh was a pre–Space Age military project that took men in balloons to the middle layers of the stratosphere.
==History==
The project started in December 1955 to study the effects of cosmic rays on humans. Three balloon flights to the stratosphere were made during the program:
* Manhigh I to 29,500 m (96,784 feet), by Captain Joseph W. Kittinger on June 2, 1957
* Manhigh II to 30,900 m (101,516 feet), by Major David G. Simons on August 19–20, 1957 for a 32-hour flight〔Kane, item 1541, p. 47〕
* Manhigh III to 29,900 m (98,097 feet), by Lieutenant Clifton M. McClure on October 8, 1958〔(Clifton McClure; Rode Balloon to Edge of Space )〕
With the pilot and the scientific payload, the Manhigh II gondola had a total mass of . At maximum altitude, the balloon expanded to a diameter of with a volume of over .
A similar project in which a man in a gondola reached an altitude of was performed in 1931 by the Swiss physicist Auguste Piccard.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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