 Specifically, the Vampire FB.5 typically undertook attack missions using a combination of rockets and bombs against insurgent targets often located in remote jungle areas throughout in Malaysia.The Vampire FB.5 became the most numerous single-seat variant of the type, 473 aircraft having been produced.Experience of Vampire operation in tropical climates led to the development of new models featuring refrigeration equipment for pilot comfort and increasingly powerful models of the Goblin engine, to counter the degradation of performance in hot conditions.