High Quality Content by WIKIPEDIA articles! The de Havilland Ghost (originally Halford H-2) was the de Havilland Engine Company`s second turbojet engine design to enter production and the world`s first gas turbine engine to enter airline (BOAC) service. A scaled up development of the Goblin, the Ghost powered the de Havilland Venom, de Havilland Comet and SAAB Tunnan.