High Quality Content by WIKIPEDIA articles! The Rolls-Royce RB.80 Conway was the first by-pass engine (or turbofan) in the world to enter service. Development started at Rolls-Royce in the 1940s, but it was used only briefly in the late 1950s and early 1960s before other turbofan designs were introduced that replaced it. The Conway powered versions of the Handley Page Victor, Vickers VC10, Boeing 707-420 and Douglas DC-8-40. The name "Conway" is an Anglo-Saxon permutation of River Conwy, in Wales, in keeping with Rolls` use of river names for jet engines.