EntityQ496735· pop 8· linked from 131 articlesD-12Sign in to saveaircraft engine family by CurtissConnectionsFairey Aviation CompanyEntityCurtissEntityCurtiss P-1 HawkEntityaluminiumEntityInternational Standard Book NumberEntityUnited States Department of DefenseConceptfour-stroke engineEntityaircraft engineEntityradial engineEntityV engineEntityreciprocating engineEntityflat engineEntitycompression ratioEntitycylinder blockEntityengine displacementEntityV12Entitystraight engineEntityR-1830 Twin WaspEntityH engineEntityW engineEntityCategories1920s aircraft piston enginesCurtiss aircraft enginesLiquid-cooled aircraft piston enginesV12 aircraft engines