Matches in DBpedia 2016-04 for { ?s ?p "The PZL SM-4 Łątka (Polish: Dragonfly) was a prototype three-seat helicopter of the 1960s, developed by WSK PZL-Świdnik in Poland. Of largely conventional design and construction, a single prototype was built, but was not flown as a result of engine problems."@en }
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- PZL_SM-4_Łątka abstract "The PZL SM-4 Łątka (Polish: Dragonfly) was a prototype three-seat helicopter of the 1960s, developed by WSK PZL-Świdnik in Poland. Of largely conventional design and construction, a single prototype was built, but was not flown as a result of engine problems.".
- Q580734 abstract "The PZL SM-4 Łątka (Polish: Dragonfly) was a prototype three-seat helicopter of the 1960s, developed by WSK PZL-Świdnik in Poland. Of largely conventional design and construction, a single prototype was built, but was not flown as a result of engine problems.".
- PZL_SM-4_Łątka comment "The PZL SM-4 Łątka (Polish: Dragonfly) was a prototype three-seat helicopter of the 1960s, developed by WSK PZL-Świdnik in Poland. Of largely conventional design and construction, a single prototype was built, but was not flown as a result of engine problems.".
- Q580734 comment "The PZL SM-4 Łątka (Polish: Dragonfly) was a prototype three-seat helicopter of the 1960s, developed by WSK PZL-Świdnik in Poland. Of largely conventional design and construction, a single prototype was built, but was not flown as a result of engine problems.".