EntityQ4650268· pop 6· linked from 22 articlesABC WaspSign in to saveR-7 piston aircraft engineConnectionsWorld War IConceptcopperEntityInternational Standard Book NumberEntityoctaneEntityaircraft engineEntityradial engineEntitycompression ratioEntityengine displacementEntityAvro 504Entityrotary engineEntityaerospace manufacturerEntitypower-to-weight ratioEntitystrokeEntityboreEntityair-cooled engineEntityABC MotorsEntitylist of aircraft enginesEntityBantamEntityGuy MotorsEntityBAT BaboonEntityCategories1910s aircraft piston enginesABC aircraft enginesAircraft air-cooled radial piston enginesSeven-cylinder engines