EntityQ917172· pop 12· linked from 69 articlesSh 14Sign in to saveR-7 piston aircraft engine family by Siemens-HalskeConnectionsFw 44 StieglitzEntityInternational Standard Book NumberEntityaircraft engineEntityradial engineEntitycompression ratioEntityengine displacementEntityvalvetrainEntityrotary engineEntityFlettner Fl 282EntityBü 133 JungmeisterEntityFw 61EntitystrokeEntitypower-to-weight ratioEntityaerospace manufacturerEntityboreEntityHeinkel He 72EntitySiemens & HalskeCompanyC.30EntityFlettner Fl 265EntityRyan AeronauticalCompanyCategories1920s aircraft piston enginesAircraft air-cooled radial piston enginesSeven-cylinder enginesSiemens-Halske aircraft engines