EntityQ3508301· pop 8· linked from 22 articlesBentley BR1Sign in to saveR-9 piston aircraft engineConnectionsMonosoupapeEntityBR2EntityUnited KingdomCountryLondonCityWorld War IConceptcarEntityOttawaEntityInternational Standard Book NumberEntityRoyal NavyEntityRoyal Air ForceEntitycastor oilEntityaircraft engineEntitySopwith CamelEntityAmazon Standard Identification NumberEntitycompression ratioEntityengine displacementEntityrotary engineEntitypiston ringEntityRoyal Flying CorpsEntityW. O. BentleyEntityCategories1910s aircraft piston enginesAir-cooled aircraft piston enginesRotary aircraft piston engines