Rolls-Royce Kestrel XVI

In 1925, Rolls-Royce began designing a radically new 12-cylinder engine in which each of the two banks of six cylinders were formed from a single aluminium-alloy block. Named the Kestrel, the engine was fitted with hand-starting gear and could achieve up to 745 hp at 14500 ft. in later models.

Kestrels were installed in numerous British and foreign aircraft, including the Hawker Hind.