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David Schwarz ((クロアチア語:David Švarc), ;〔''David'' in isolation: .〕 20 December 1852 – 13 January 1897)〔 was a Hungarian-Croatian aviation pioneer of Jewish descent. He is known for creating the first airship with an external hull made entirely of metal, but he died before it was flown. Some sources〔 have claimed that Count Ferdinand Graf von Zeppelin purchased Schwarz's airship patent from his widow, a claim which has been disputed.〔 He was the father of the opera and operetta soprano Vera Schwarz (1888–1964). Sources for his date of birth vary. The OCLC cites Rotem, Ẓ. giving it as 7 December 1850, while Brockhaus gives it as 20 December 1850〔 The OCLC, as well as Brockhaus, show Schwarz's place of birth as Zalaegerszeg, ''ドイツ語:Ungarn'' (Hungary).〔 Sources do not agree regarding Schwarz's nationality: some claim Austrian, others Croatian or Hungarian.〔 == Early life == David Schwarz was born in Keszthely, Kingdom of Hungary, the son of Jewish parents.〔〔 He was a timber merchant raised in Županja, but he spent most of his life in Zagreb, then part of the Austro-Hungarian Empire.〔〔 Although Schwarz had no special technical training, he became interested in technology and developed improvements for woodcutting machinery. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「David Schwarz (aviation inventor)」の詳細全文を読む スポンサード リンク
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