Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q17021508> ?p ?o }
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- Q17021508 subject Q6571493.
- Q17021508 subject Q7003889.
- Q17021508 subject Q8519684.
- Q17021508 abstract "Petróczy, Kármán and Žurovec were three Hungarian engineers who worked on helicopter development immediately before and during World War I. Between them they produced two experimental prototypes, the PKZ-1 and PKZ-2, intended to replace the dangerous hydrogen-filled observation balloons then in use. As such, these craft were tethered on long cables and were not intended to fly freely. After the war other engineers, notably Oszkár von Asboth, further developed the design.".
- Q17021508 thumbnail A_PKZ-helikopter_50_méter_magasságban.jpg?width=300.
- Q17021508 wikiPageWikiLink Q159241.
- Q17021508 wikiPageWikiLink Q164384.
- Q17021508 wikiPageWikiLink Q27091.
- Q17021508 wikiPageWikiLink Q361.
- Q17021508 wikiPageWikiLink Q362539.
- Q17021508 wikiPageWikiLink Q542056.
- Q17021508 wikiPageWikiLink Q556.
- Q17021508 wikiPageWikiLink Q6571493.
- Q17021508 wikiPageWikiLink Q7003889.
- Q17021508 wikiPageWikiLink Q716342.
- Q17021508 wikiPageWikiLink Q8519684.
- Q17021508 comment "Petróczy, Kármán and Žurovec were three Hungarian engineers who worked on helicopter development immediately before and during World War I. Between them they produced two experimental prototypes, the PKZ-1 and PKZ-2, intended to replace the dangerous hydrogen-filled observation balloons then in use. As such, these craft were tethered on long cables and were not intended to fly freely. After the war other engineers, notably Oszkár von Asboth, further developed the design.".
- Q17021508 label "Petróczy-Kármán-Žurovec".
- Q17021508 depiction A_PKZ-helikopter_50_méter_magasságban.jpg.