EntityQ1455283· pop 5· linked from 153 articlesO-435Sign in to save6-cylinder horizontally-opposed piston engine family by LycomingConnectionsBell 47EntityvalvetrainEntityKaman K-225EntityT55EntityInternational Standard Book NumberEntitytankEntityhelicopterEntityinternal combustion engineEntitypistonEntitygas turbineEntityturbochargerEntityFederal Aviation AdministrationEntityturbopropEntityturbofanEntityaircraft engineEntitycylinderEntityradial engineEntityPratt & WhitneyEntityflat engineEntitycompression ratioEntityCategories1940s aircraft piston enginesAir-cooled aircraft piston enginesBoxer enginesLycoming aircraft enginesSix-cylinder engines