Matches in DBpedia 2014 for { ?s ?p <http://dbpedia.org/resource/Category:Aircraft_piston_engines_1920–1929> . }
- Walter_NZ_120 subject Category:Aircraft_piston_engines_1920–1929.
- Walter_NZ_60 subject Category:Aircraft_piston_engines_1920–1929.
- Walter_Vega subject Category:Aircraft_piston_engines_1920–1929.
- Walter_Venus subject Category:Aircraft_piston_engines_1920–1929.
- Warner_Scarab subject Category:Aircraft_piston_engines_1920–1929.
- Wright_Cyclone_series subject Category:Aircraft_piston_engines_1920–1929.
- Wright_R-540 subject Category:Aircraft_piston_engines_1920–1929.
- Wright_R-760 subject Category:Aircraft_piston_engines_1920–1929.
- Wright_R-790_Whirlwind subject Category:Aircraft_piston_engines_1920–1929.
- Wright_R-975 subject Category:Aircraft_piston_engines_1920–1929.
- Wright_T-3_Tornado subject Category:Aircraft_piston_engines_1920–1929.
- Wright_Whirlwind subject Category:Aircraft_piston_engines_1920–1929.