 The Vampires of the RAAF were powered by the Nene engine; these were initially outfitted with dorsal intakes, but the intakes were subsequently repositioned underneath the fuselage instead.In 1949, Boulton Paul Aircraft redesigned the wing-root intakes and internal ducting based on the installation of the Nene in the prototype Hawker Sea Hawk.The "Mistral", the French name for their models of the Vampire, also used the Nene engine with Boulton Paul intakes.