Matches in DBpedia 2014 for { ?s ?p <http://dbpedia.org/resource/Category:Hydrogen-powered_aircraft> . }
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- Avatar_(spacecraft) subject Category:Hydrogen-powered_aircraft.
- Boeing_Phantom_Eye subject Category:Hydrogen-powered_aircraft.
- DLR_Smartfish subject Category:Hydrogen-powered_aircraft.
- Hydrogen-powered_aircraft subject Category:Hydrogen-powered_aircraft.
- Hyfish subject Category:Hydrogen-powered_aircraft.
- Lockheed_CL-400_Suntan subject Category:Hydrogen-powered_aircraft.
- Reaction_Engines_A2 subject Category:Hydrogen-powered_aircraft.
- Rockwell_X-30 subject Category:Hydrogen-powered_aircraft.
- Skylon_(spacecraft) subject Category:Hydrogen-powered_aircraft.
- Tupolev_Tu-155 subject Category:Hydrogen-powered_aircraft.
- Zero_Emission_Hyper_Sonic_Transport subject Category:Hydrogen-powered_aircraft.