The Hawker Fury was a British biplane fighter aircraft used by the Royal Air Force in the 1930s. It was originally named the Hornet and was the counterpart to the Hawker Hart light bomber. The Hawker Fury was a development of the earlier Hawker F.20/27 prototype fighter, replacing the F.20/27's radial engine with the new Rolls-Royce F.XI V-12 engine (later known as the Rolls-Royce Kestrel), which was also used by Hawker's new light bomber, the Hawker Hart. The new fighter prototype, known as the Hawker Hornet, first flew at Brooklands, Surrey, in March 1929. The Hornet was a single engined biplane, with single bay wings, initially powered by a 420 hp (313 kW) Rolls-Royce F.XIC engine enclosed by a smooth, streamlined cowling, but was quickly re-engined with a 480 hp (358 kW) Kestrel IS . It was evaluated against the similarly powered Fairey Firefly II, being preferred because of its better handling and its all metal structure compared with the mainly wooden construction of the Firefly.