EntityQ4688371· pop 6· linked from 13 articlesAeronca E-107Sign in to saveO-2 piston aircraft engineConnectionsUnited StatesCountryWorld War IConceptMichiganEntityDetroitEntityOshkoshEntityaircraft engineEntityNational Air and Space MuseumEntitycompression ratioEntityengine displacementEntityvalvetrainEntityoverhead valveEntityaerospace manufacturerEntitystrokeEntityflathead engineEntityboreEntitySteven F. Udvar-Hazy CenterEntitylist of aircraft enginesEntitybrake specific fuel consumptionEntityflat-twinEntityAeronca C-2EntityCategories1920s aircraft piston enginesBoxer engines