The Fairey Battle was a single-engine monoplane light bomber, powered by a Rolls-Royce Merlin engine. Production aircraft were progressively powered by various models of the Merlin engine, such as the Merlin I, II, III (most numerous) and V but all bomber variants were called the Battle Mk I. The Battle had a relatively clean design, having adopted a slim oval-shaped fuselage which was manufactured in two sections. The forward section, in front of the cockpit, relied mainly upon a steel tubular structure to support the weight of the nose-mounted engine; the rear section was of a metal monocoque structure comprised hoop frames and Z-section stringers which was built on jigs. The structure of the aircraft involved several innovations and firsts for Fairey, it had the distinction of being the company's first low-wing monoplane; it also was the first light-alloy stressed-skin construction aircraft to be produced by the firm.