A group of Australian and New Zealand personnel examine a CAC Boomerang from 5 (Tactical Reconnaissance) Squadron RAAF, based at Piva Airfield at Torokina, Bougainville, Solomon Islands, probably in January 1945.
Barely two months after Pearl Harbour, Japanese bombers attacked Darwin, Australia’s Northern Territory capital, in the first of 97 raids.
Australia had never before produced a frontline combat aircraft. The new plane had to use whatever components were already on hand: engines from a torpedo bomber, structural elements from a trainer. It was designed by Friedrich David, who was officially an enemy alien. Born with few advantages but succeeding through dogged persistence, the Commonwealth Aircraft Company CA-12 through CA-19 Boomerangs were true “Aussie battlers.”
An Austrian Jew, Fred David had been sent to Japan by Ernst Heinkel to save him from Nazi persecution. There he helped develop the Mitsubishi A5M “Claude” fighter and Aichi D3A “Val” dive bomber before the Kempeitai secret police began to show an unwelcome interest in him. Fleeing to Australia just as war broke out, David was interned as an enemy alien until CAC’s general manager, Wing Commodore Lawrence Wackett, arranged for his release and appointed him chief engineer. Even so, David had to report to the police every two weeks.
Australia was producing two military aircraft at the time: the obsolescent Bristol Beaufort torpedo bomber and the Commonwealth Aircraft Corporation (CAC) Wirraway (Aboriginal for “challenge”), a trainer and general-purpose aircraft developed from the North American NA-16 - known as the Harvard I to Commonwealth forces. David designed the Boomerang around the Beaufort’s 1,200-hp Twin Wasp engine, reusing the jigs used to build the Wirraway’s wing, centre section, landing gear and tail assembly.
Initial tests brought good news and bad. The Boomerang’s agility and high rate of climb meant it could hold its own in mock dogfights against a Bell P-39 Airacobra and a Curtiss Kittyhawk (the RAF name for the P-40D and later variants), but its comparatively underpowered engine was a concern, especially above 15,000 feet.
The RAAF ordered 105 CA-12 Boomerangs in February 1942, the same month as the initial raid on Darwin, receiving the first aircraft just five months later. An order for 145 more led to the CA-13, CA-14 and CA-19 versions, each with minor improvements. A single CA-14 was fitted with a General Electric supercharger to improve high-altitude performance, but it barely fit into the compact fuselage and its large intake resulted in buffeting problems. By this time, though, the Boomerang was being replaced by faster Supermarine Spitfire Mk. Vcs (the first 70 of which reached Australia in January 1943) and P-40D Kittyhawks from Britain and the US.
After RAAF fighter squadrons reequipped with Spitfires and Kittyhawks, the Boomerang found its true calling as a close support and tactical reconnaissance aircraft with Nos. 4 and 5 squadrons in New Guinea, the Solomon Islands and Borneo. The fighter’s armament, ruggedness and agility suited it for this new role. Operating in pairs, one at treetop height and one flying top cover, Boomerangs dealt with enemy positions ahead of advancing Allied forces. In addition to employing their guns, they could carry bombs weighing up to 500 pounds on a central hardpoint, as well as 20-pound smoke bombs to mark targets.
No. 5 Squadron also received Boomerangs in 1943, and was sent to Bougainville as part of No. 84 (Army Co-operation) Wing. On April 16, 1945, when two Australian brigades were held up by a Japanese force blocking a vital road, No. 5’s Boomerangs placed smoke bombs just 25 yards apart and 300 yards from the Australian front line, enabling Royal New Zealand Air Force F4U Corsairs to clear the way, with no Australian casualties.
Group Captain G.N. Roberts, who commanded the New Zealand Air Task Force, said, “The excellent pinpointing by the Boomerangs has made the job a great deal easier and much more effective.”
Colour: Benjamin Thomas - Colours of Yesterday