In 1897, an airship with an aluminum envelope was built by the Hungarian-Croatian engineer David Schwarz. It made its first flight at Tempelhof field in Berlin after Schwarz had died. His widow, Melanie Schwarz, was paid 15,000 marks by Count Ferdinand von Zeppelin to release the industrialist Carl Berg from his exclusive contract to supply Schwartz with aluminium.Brooks 1992 pp. 27–31.
In 1897, an airship with an aluminum envelope was built by the Hu.ngarian-Croatian engineer David Schwarz. It made its first flight at Tempelhof field in Berlin after Schwarz had died His widow, Melanie Schwarz, was paid 15,000 marks by Count Ferdinand von Zeppelin to release the industrialist Carl Berg from his exclusive contract to supply Schwartz with aluminium.Brooks 1992 pp. 27–31.