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Hans Georg Friedrich Groß
Hans Georg Friedrich Groß, (4 May 1860 - 27 February 1924), was a German balloonist and airship constructor.〔Luisenstadt 2008〕
== Balloons ==
In the 1890s, the ''Verein zur Förderung der Luftschifffahrt'' (an association promoting airflight founded in 1881) conducted scientific balloon ascents to study the upper atmosphere on the initiative of Richard Assmann. Hans Groß was ''Premiereleutnant'' of the ''Berliner Luftschifferabteilung'' (Berlin airship department), and as balloon pilot took part in 28 of these studies.
Hydrogen balloon plans by Groß led to the construction of the ''Humboldt''. This performed six ascents, two ending in non-fatal crashes; during deflation after its final landing in 26 April 1893, it exploded due to electrostatic charging and burnt. For his next balloon, the ''Phönix'', Groß developed a variant of the ''Reißbahn'' invented by John Wise in 1844. This allowed the pilot to rapidly deflate a gas balloon upon landing. The ''Phönix'' performed 23 manned ascents from 1893 to 1896, a total 180 hours in the air and reached a maximum altitude of 9155 metres on 1894-12-04 with Arthur Berson.
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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