EntityQ976186· pop 9· linked from 170 articlesWarner ScarabSign in to savemodel of aircraft engineConnectionsMichiganEntityDetroitEntityWayback MachineEntityProvince of PaduaEntityUnited States Department of DefenseConceptoctane ratingEntityDue CarrareEntityaircraft engineEntityV engineEntityradial engineEntityflat engineEntitycompression ratioEntityengine displacementEntitystraight engineEntitySikorsky R-4EntityvalvetrainEntityrotary engineEntityR-1830 Twin WaspEntityH engineEntityW engineEntityCategories1920s aircraft piston enginesAircraft air-cooled radial piston engines