The CAC Boomerang was a WW2 fighter aircraft designed and manufactured in Australia by the Commonwealth Aircraft Corporation between 1942 and 1945. Approved for production shortly following the Empire of Japan's entry into the Second World War, the Boomerang was rapidly designed as to meet the urgent demands for fighter aircraft to equip the Royal Australian Air Force (RAAF). It was the first combat aircraft designed and constructed in Australia.

The Boomerang was a small single-engine monoplane fighter aircraft, designed with an emphasis on high manoeuvrability. It had a stubby appearance, which had resulted from the structure being derived from the smaller Wirraway being paired with a considerably larger engine in the form of a 1,200 horsepower (890 kW) Pratt & Whitney R-1830 Twin Wasp radial engine, which drove a three-bladed Hamilton Standard Hydromatic propeller, license-built by de Havilland.

[Information from Wikipedia]