Matches in DBpedia 2014 for { ?s ?p <http://dbpedia.org/resource/Category:Aircraft_piston_engines_1920–1929> . }
- ABC_8_hp subject Category:Aircraft_piston_engines_1920–1929.
- ABC_Hornet subject Category:Aircraft_piston_engines_1920–1929.
- ABC_Scorpion subject Category:Aircraft_piston_engines_1920–1929.
- ADC_Airdisco subject Category:Aircraft_piston_engines_1920–1929.
- ADC_Cirrus subject Category:Aircraft_piston_engines_1920–1929.
- ADC_Nimbus subject Category:Aircraft_piston_engines_1920–1929.
- Aeronca_E-107 subject Category:Aircraft_piston_engines_1920–1929.
- Aichi_AC-1 subject Category:Aircraft_piston_engines_1920–1929.
- Argus_As_10 subject Category:Aircraft_piston_engines_1920–1929.
- Armstrong_Siddeley_Genet subject Category:Aircraft_piston_engines_1920–1929.
- Armstrong_Siddeley_Genet_Major subject Category:Aircraft_piston_engines_1920–1929.
- Armstrong_Siddeley_Jaguar subject Category:Aircraft_piston_engines_1920–1929.
- Armstrong_Siddeley_Leopard subject Category:Aircraft_piston_engines_1920–1929.
- Armstrong_Siddeley_Lynx subject Category:Aircraft_piston_engines_1920–1929.
- Armstrong_Siddeley_Mongoose subject Category:Aircraft_piston_engines_1920–1929.
- Armstrong_Siddeley_Ounce subject Category:Aircraft_piston_engines_1920–1929.
- Armstrong_Siddeley_Panther subject Category:Aircraft_piston_engines_1920–1929.
- Armstrong_Siddeley_Serval subject Category:Aircraft_piston_engines_1920–1929.
- BMW_V subject Category:Aircraft_piston_engines_1920–1929.
- BMW_VI subject Category:Aircraft_piston_engines_1920–1929.
- BMW_VII subject Category:Aircraft_piston_engines_1920–1929.
- BMW_X subject Category:Aircraft_piston_engines_1920–1929.
- Beardmore_Cyclone subject Category:Aircraft_piston_engines_1920–1929.
- Beardmore_Tornado subject Category:Aircraft_piston_engines_1920–1929.
- Blackburne_Thrush subject Category:Aircraft_piston_engines_1920–1929.
- Blackburne_Tomtit subject Category:Aircraft_piston_engines_1920–1929.
- Bristol_Cherub subject Category:Aircraft_piston_engines_1920–1929.
- Bristol_Mercury subject Category:Aircraft_piston_engines_1920–1929.
- Bristol_Phoenix subject Category:Aircraft_piston_engines_1920–1929.
- Bristol_Titan subject Category:Aircraft_piston_engines_1920–1929.
- British_Salmson_AD.9 subject Category:Aircraft_piston_engines_1920–1929.
- Curtiss_C-6 subject Category:Aircraft_piston_engines_1920–1929.
- Curtiss_D-12 subject Category:Aircraft_piston_engines_1920–1929.
- Curtiss_H-1640 subject Category:Aircraft_piston_engines_1920–1929.
- Curtiss_R-600 subject Category:Aircraft_piston_engines_1920–1929.
- Curtiss_V-1570 subject Category:Aircraft_piston_engines_1920–1929.
- Curtiss_V-2 subject Category:Aircraft_piston_engines_1920–1929.
- De_Havilland_Ghost_(V8) subject Category:Aircraft_piston_engines_1920–1929.
- De_Havilland_Gipsy subject Category:Aircraft_piston_engines_1920–1929.
- Fiat_A.20 subject Category:Aircraft_piston_engines_1920–1929.
- Fiat_A.22 subject Category:Aircraft_piston_engines_1920–1929.
- Fiat_A.24 subject Category:Aircraft_piston_engines_1920–1929.
- Fiat_A.25 subject Category:Aircraft_piston_engines_1920–1929.
- Fiat_A.30 subject Category:Aircraft_piston_engines_1920–1929.
- Fiat_A.50 subject Category:Aircraft_piston_engines_1920–1929.
- Fiat_AN.1 subject Category:Aircraft_piston_engines_1920–1929.
- Fiat_AS.2 subject Category:Aircraft_piston_engines_1920–1929.
- Fiat_AS.3 subject Category:Aircraft_piston_engines_1920–1929.
- Fiat_AS.5 subject Category:Aircraft_piston_engines_1920–1929.
- Fiat_AS.6 subject Category:Aircraft_piston_engines_1920–1929.
- Gnome-Rhône_7K subject Category:Aircraft_piston_engines_1920–1929.
- Gnome-Rhône_9K subject Category:Aircraft_piston_engines_1920–1929.
- Gnome-Rhône_Mistral_Major subject Category:Aircraft_piston_engines_1920–1929.
- Harkness_Hornet subject Category:Aircraft_piston_engines_1920–1929.
- Hiro_Type_14_(engine) subject Category:Aircraft_piston_engines_1920–1929.
- Hirth_HM_60 subject Category:Aircraft_piston_engines_1920–1929.
- Hispano-Suiza_12M subject Category:Aircraft_piston_engines_1920–1929.
- Hispano-Suiza_12N subject Category:Aircraft_piston_engines_1920–1929.
- Hispano-Suiza_14AB subject Category:Aircraft_piston_engines_1920–1929.
- Hispano-Suiza_18R subject Category:Aircraft_piston_engines_1920–1929.
- Isotta_Fraschini_Delta subject Category:Aircraft_piston_engines_1920–1929.
- Junkers_Jumo_204 subject Category:Aircraft_piston_engines_1920–1929.
- Junkers_L1 subject Category:Aircraft_piston_engines_1920–1929.
- Junkers_L2 subject Category:Aircraft_piston_engines_1920–1929.
- Junkers_L5 subject Category:Aircraft_piston_engines_1920–1929.
- Junkers_L55 subject Category:Aircraft_piston_engines_1920–1929.
- Junkers_L8 subject Category:Aircraft_piston_engines_1920–1929.
- Lawrance_J-1 subject Category:Aircraft_piston_engines_1920–1929.
- Lorraine_12E_Courlis subject Category:Aircraft_piston_engines_1920–1929.
- Lycoming_R-680 subject Category:Aircraft_piston_engines_1920–1929.
- Napier_Rapier subject Category:Aircraft_piston_engines_1920–1929.
- Packard_1A-1500 subject Category:Aircraft_piston_engines_1920–1929.
- Packard_1A-2500 subject Category:Aircraft_piston_engines_1920–1929.
- Packard_DR-980 subject Category:Aircraft_piston_engines_1920–1929.
- Packard_X-2775 subject Category:Aircraft_piston_engines_1920–1929.
- Pobjoy_R subject Category:Aircraft_piston_engines_1920–1929.
- Pratt_&_Whitney_R-1340_Wasp subject Category:Aircraft_piston_engines_1920–1929.
- Pratt_&_Whitney_R-1690_Hornet subject Category:Aircraft_piston_engines_1920–1929.
- Pratt_&_Whitney_R-1860 subject Category:Aircraft_piston_engines_1920–1929.
- Pratt_&_Whitney_R-985_Wasp_Junior subject Category:Aircraft_piston_engines_1920–1929.
- Renault_4P subject Category:Aircraft_piston_engines_1920–1929.
- Rolls-Royce_Buzzard subject Category:Aircraft_piston_engines_1920–1929.
- Rolls-Royce_Eagle_XVI subject Category:Aircraft_piston_engines_1920–1929.
- Rolls-Royce_Kestrel subject Category:Aircraft_piston_engines_1920–1929.
- Rolls-Royce_R subject Category:Aircraft_piston_engines_1920–1929.
- Salmson_9_AD subject Category:Aircraft_piston_engines_1920–1929.
- Salmson_AD.3 subject Category:Aircraft_piston_engines_1920–1929.
- Shvetsov_M-11 subject Category:Aircraft_piston_engines_1920–1929.
- Siddeley_Tiger subject Category:Aircraft_piston_engines_1920–1929.
- Siemens-Halske_Sh_11 subject Category:Aircraft_piston_engines_1920–1929.
- Siemens-Halske_Sh_12 subject Category:Aircraft_piston_engines_1920–1929.
- Siemens-Halske_Sh_13 subject Category:Aircraft_piston_engines_1920–1929.
- Siemens-Halske_Sh_14 subject Category:Aircraft_piston_engines_1920–1929.
- Siemens-Halske_Sh_4 subject Category:Aircraft_piston_engines_1920–1929.
- Siemens-Halske_Sh_5 subject Category:Aircraft_piston_engines_1920–1929.
- Sunbeam_Pathan subject Category:Aircraft_piston_engines_1920–1929.
- Sunbeam_Sikh subject Category:Aircraft_piston_engines_1920–1929.
- Szekely_SR-3 subject Category:Aircraft_piston_engines_1920–1929.
- Walter_Castor subject Category:Aircraft_piston_engines_1920–1929.
- Walter_Minor subject Category:Aircraft_piston_engines_1920–1929.