Commonwealth Aircraft Corporation

Commonwealth Aircraft Corporation (CAC) was an Australian aircraft and aero-engine manufacturer created in the 1930s to give Australia an independent capacity to design, build, and maintain military aircraft. Its formation reflected growing concern that Australia might be unable to obtain sufficient aircraft, engines, and spares from Britain during a major conflict. The initiative was strongly promoted by Essington Lewis, chief general manager of BHP, after his 1935 visit to Europe. The Australian government encouraged negotiations among industrial companies, resulting in CAC's incorporation in Melbourne on 17 October 1936. The founding industrial participants included BHP, General Motors-Holden, Broken Hill Associated Smelter, Imperial Chemical Industries, the Orient Steam Navigation Company, and the Electrolytic Zinc Company. CAC established its main factory at Fishermans Bend, where construction was completed in 1937. The company acquired Tugan Aircraft of Mascot soon after formation, bringing engineer and aircraft designer Lawrence Wackett into the business. Wackett became general manager and was central to CAC's early technical development. The company's first major aircraft was the CAC Wirraway, an Australian adaptation of the North American NA-16 advanced trainer. CAC also manufactured the Pratt & Whitney R-1340 engine used by the Wirraway and produced propellers when wartime supply constraints made imported components difficult to obtain. This integration of airframe, engine, and propeller production was unusual for an Australian manufacturer of the period. During the Second World War, CAC supplied the Royal Australian Air Force with trainers, general-purpose aircraft, and fighters. It built large numbers of Wirraways, developed the Wackett trainer, and produced the Boomerang fighter, an indigenous design derived from the company's wartime engineering experience. CAC also worked on the Woomera twin-engined bomber and later developed the CA-15 fighter, but both programmes remained effectively experimental and did not enter series production. The company assembled and manufactured Australian versions of the North American P-51 Mustang after the war, supporting the RAAF's transition to higher-performance fighters. In the post-war period CAC combined licensed production, local modification, and indigenous design. Its Winjeel trainer became an important Australian military training aircraft, while the Avon-Sabre represented a locally adapted version of the North American F-86 Sabre with changes to its engine and armament. CAC later produced the CA-28 Ceres agricultural aircraft, the CA-30 Macchi MB-326H jet trainer, and CA-32 Kiowa light observation helicopters. It also manufactured aero-engines from suppliers including Rolls-Royce, Snecma, Bristol Siddeley, and General Electric. CAC increasingly operated as part of broader Australian defence-industrial programmes. It supplied structures, engines, and components for Government Aircraft Factories production of the Mirage III and F/A-18 Hornet, and carried out modification work on aircraft such as the P-3 Orion and Fokker F27. The company also diversified into bus-body production under the Comair name, producing more than 3,600 bodies between 1946 and 1973 and later manufacturing bodies for MAN chassis. These activities helped retain manufacturing skills and supplement aircraft revenue. CAC's independent corporate identity ended in the 1980s. Hawker de Havilland acquired full ownership in 1985, and the company was renamed Hawker de Havilland Victoria in 1986. Boeing Australia subsequently acquired Hawker de Havilland in 2000. CAC therefore survives primarily as a historical predecessor within Australia's aerospace-manufacturing lineage rather than as an active standalone brand.

Commonwealth Aircraft Corporation emerged from Australia's pre-war effort to establish a self-sufficient aircraft industry. In 1935, BHP chief general manager Essington Lewis returned from Europe convinced that war was likely and that Australia lacked the industrial base needed to equip its armed forces. He lobbied the Australian government and helped bring domestic companies into negotiations. BHP, General Motors-Holden, Broken Hill Associated Smelter, Imperial Chemical Industries, the Orient Steam Navigation Company, and the Electrolytic Zinc Company became associated with the new enterprise, which was incorporated in Melbourne on 17 October 1936. CAC built its principal plant at Fishermans Bend, completed in 1937, and acquired Tugan Aircraft shortly after formation. The acquisition brought Lawrence Wackett into the company; as general manager, he guided its early engineering and production programme. Wackett had led an international technical mission that evaluated aircraft suitable for Australian manufacture. CAC selected the North American NA-16 as the basis for the Wirraway, adapting the design to local requirements and industrial capabilities. The company manufactured the Wirraway's Pratt & Whitney R-1340 engine and, when overseas supply became unreliable, also made propellers. This made CAC one of the relatively few manufacturers able to produce an aircraft together with its engine and propeller. CAC expanded rapidly during the Second World War. It built successive production batches of the Wirraway, produced the Wackett trainer, and developed the Boomerang fighter. The Woomera medium-bomber project and CA-15 fighter demonstrated a growing indigenous design capability, although neither became a successful production aircraft. After the war, CAC assembled and manufactured Australian versions of the P-51 Mustang and developed the Winjeel trainer. In 1951 it received approval to design and manufacture an Australian version of the F-86 Sabre. The resulting Avon-Sabre used a locally produced Rolls-Royce Avon engine and incorporated changes to armament and systems; production ended in 1961. The company then participated in a succession of licensed and subcontracted programmes. It manufactured components for the Government Aircraft Factories' Mirage III production, built the Macchi MB-326H as the CA-30, and produced CA-32 Kiowa helicopters for the Australian Army and Royal Australian Navy. The Kiowa was the last complete aircraft type built by CAC. The company also supported the A10 Wamira project, though the programme was cancelled in 1985. Its later work included life-extension modifications for Macchi trainers, P-3 Orion systems integration, Fokker F27 survey-equipment installation, and structural and engine work for Australian-built F/A-18 Hornets. Aircraft production was supplemented by bus-body manufacturing. Under the Comair name, CAC produced bodies on Bedford chassis and later built VöV-standard bodies on MAN chassis. This diversification helped retain skilled sheet-metal workers during periods when aircraft orders were uneven. Across its existence, CAC produced more than 1,700 aircraft, including prototypes and locally assembled aircraft, with nearly 550 representing types wholly designed by the company. Hawker de Havilland acquired the business in 1985 and renamed it Hawker de Havilland Victoria in 1986. Boeing Australia acquired Hawker de Havilland in 2000, bringing CAC's successor operations into Boeing's Australian industrial network.

• 2000

  Boeing Australia acquisition

  [1]Commonwealth Aircraft Corporationen.wikipedia.org

  Boeing Australia acquired Hawker de Havilland, absorbing the successor business associated with CAC.

• 1986

  Renamed Hawker de Havilland Victoria

  [1]Commonwealth Aircraft Corporationen.wikipedia.org

  The former CAC business adopted the Hawker de Havilland Victoria name.

• 1985

  Acquired by Hawker de Havilland

  [1]Commonwealth Aircraft Corporationen.wikipedia.org

  CAC became a wholly owned Hawker de Havilland subsidiary; the Wamira project was also cancelled during this period.

• 1971

  Kiowa production begins

  [1]Commonwealth Aircraft Corporationen.wikipedia.org

  CAC entered rotary-wing production with the CA-32 version of the Bell 206B Kiowa.

• 1967

  Macchi trainer production begins

  [1]Commonwealth Aircraft Corporationen.wikipedia.org

  CAC commenced production of the CA-30 Macchi MB-326H, adapted for Australian service.

• 1964

  Mirage III component production begins

  [1]Commonwealth Aircraft Corporationen.wikipedia.org

  CAC began producing major components for the Australian Government Aircraft Factories version of the Dassault Mirage III.

• 1951

  Australian Sabre programme approved

  [1]Commonwealth Aircraft Corporationen.wikipedia.org

  CAC received approval to develop and manufacture an Australian version of the F-86 Sabre.

• 1942

  Boomerang enters production

  [1]Commonwealth Aircraft Corporationen.wikipedia.org

  The company began production of the CA-12 and later CA-13 and CA-19 Boomerang fighter variants.

• 1938

  Wirraway production begins

  [1]Commonwealth Aircraft Corporationen.wikipedia.org

  CAC began producing the Wirraway, an Australian adaptation of the North American NA-16 trainer.

• 1937

  Fishermans Bend factory completed

  [1]Commonwealth Aircraft Corporationen.wikipedia.org

  CAC completed its principal aircraft-manufacturing facility at Fishermans Bend in Melbourne.

• 1936

  CAC incorporated

  [1]Commonwealth Aircraft Corporationen.wikipedia.org

  Commonwealth Aircraft Corporation was incorporated in Melbourne on 17 October, with participation from major Australian industrial companies.

• 1935

  Industrial campaign for an Australian aircraft industry

  [1]Commonwealth Aircraft Corporationen.wikipedia.org

  Essington Lewis returned from Europe concerned about Australia's dependence on overseas aircraft supplies and began lobbying for domestic military-aircraft manufacturing.

A domestic Australian defence and aerospace manufacturer combining indigenous aircraft design with licensed production, component manufacturing, aircraft modification, and aero-engine production.

• Trainer and general-purpose aircraft · 1938

  CAC Wirraway

  The Wirraway was CAC's first major aircraft and an Australian adaptation of the North American NA-16. It served primarily as an advanced trainer and general-purpose aircraft with the RAAF, while also supporting reconnaissance and operational duties. CAC produced successive CA-1, CA-3, CA-5, CA-7, CA-8, CA-9, and CA-16 production batches. The aircraft established the company's manufacturing methods and helped create an Australian supply base for airframes, engines, and propellers.

• Trainer aircraft · 1939

  CAC Wackett Trainer

  The Wackett was CAC's second aircraft type and an indigenous basic trainer designed under Lawrence Wackett's direction. Two prototypes preceded the production CA-6 version. The simple, locally designed aircraft was intended to support Australian military pilot training and demonstrated that CAC could move beyond licensed or adapted foreign designs.

• Fighter aircraft · 1942

  CAC Boomerang

  The Boomerang was a compact Australian fighter developed during the Second World War. The CA-12, CA-13, and later CA-19 contracts produced the principal operational variants, while the CA-14 was an experimental turbocharged aircraft. Designed around available production capabilities and engines, the Boomerang provided a locally manufactured fighter at a time when imported aircraft and components were under severe wartime pressure.

• Fighter aircraft · 1945

  CAC Mustang

  CAC produced Australian versions of the North American P-51 Mustang after the war. The CA-17 and CA-18 programmes initially involved assembly from imported components and later local production. These aircraft supported the RAAF's post-war fighter capability and gave CAC experience with higher-performance metal aircraft and complex production arrangements.

• Trainer aircraft · 1955

  CAC Winjeel

  The Winjeel was an indigenous two-seat trainer developed by CAC after the Second World War. Following prototype work under the CA-22 designation, the CA-25 production version entered service as an Australian military training aircraft. It was designed for local operational and training requirements and formed an important part of CAC's post-war indigenous design portfolio.

• Fighter aircraft · 1953

  CAC CA-27 Avon-Sabre

  The Avon-Sabre was CAC's Australian version of the North American F-86 Sabre. It incorporated the locally produced Rolls-Royce Avon engine and changes to armament and other systems. The programme represented a substantial Australian industrial undertaking and allowed CAC to build experience in jet-fighter manufacture. CAC produced a prototype and 111 production aircraft, with production ending in 1961.

• Agricultural aircraft

  CAC Ceres

  The CA-28 Ceres was an agricultural aircraft developed and built by CAC as a private venture. Twenty-one examples were produced. It broadened the company's portfolio beyond military aircraft and served the crop-dusting and agricultural aviation market.

• Jet trainer aircraft · 1967

  CAC CA-30 Macchi MB-326H

  The CA-30 was CAC's Australian production version of the Aermacchi MB-326H jet trainer. Twenty aircraft were assembled from imported components and a further group was built under local production arrangements. The aircraft was adapted for Australian conditions and served as an important advanced-training type for the RAAF.

• Light observation helicopter · 1971

  CAC CA-32 Kiowa

  The CA-32 was CAC's licence-built and locally assembled version of the Bell 206B Kiowa. Twelve helicopters were assembled from imported components and 44 were built locally. Delivered to the Australian Army and Royal Australian Navy, the Kiowa marked CAC's entry into rotary-wing aircraft production and became the last complete aircraft type manufactured by the company.

• Aero-engines

  CAC aero-engines

  CAC manufactured or assembled engines for a broad range of Australian aircraft programmes. Its engine work included Pratt & Whitney R-1340 and R-1830 radial engines, Rolls-Royce Merlin, Nene, and Avon engines, Snecma Atar engines for the Mirage, Bristol Siddeley Viper engines for the Macchi, and General Electric F404 engines associated with Australian-built F/A-18 aircraft.

• Bus bodies · 1946

  Comair bus bodies

  CAC diversified into bus-body construction under the Comair name to supplement aircraft revenue and preserve sheet-metal manufacturing skills. From 1946 to 1973 it produced more than 3,600 bodies, mainly on Bedford chassis for Victorian operators. It later built VöV-standard bodies on MAN SL200 chassis and briefly resumed Bedford-based production.

• 1985

  Accept acquisition by Hawker de HavillandM&A

  Background

  CAC was operating within a consolidating Australian aerospace sector and had participated increasingly in subcontracting and modification programmes.

  Action taken

  Hawker de Havilland acquired full ownership of CAC.

  Aftermath

  The CAC name was replaced by Hawker de Havilland Victoria in 1986, and the business later passed to Boeing Australia.

  Source

• 1964

  Move further into subcontracted defence productionStrategy

  Background

  Australia's post-war aerospace industry increasingly relied on government-led programmes and partnerships among domestic manufacturers.

  Action taken

  CAC began producing major structures and engines for the Government Aircraft Factories' Australian Mirage III programme.

  Aftermath

  The company expanded from complete aircraft into airframe shipsets, engines, and systems work for later Australian defence programmes.

  Source

• 1936

  Establish an Australian military-aircraft manufacturing baseStrategy

  Background

  Australian industrial and government leaders were concerned that the country lacked the capacity to produce aircraft and engines and might be cut off from traditional British suppliers during wartime.

  Action taken

  Industrial companies formed Commonwealth Aircraft Corporation to design, manufacture, and support military aircraft domestically.

  Aftermath

  CAC became a major Australian aircraft producer and supplied the RAAF with trainers, fighters, engines, and aircraft components.

  Source

1. 1Commonwealth Aircraft Corporationen.wikipedia.org
2. 2Boeing Australia: Commonwealth Aircraft Corporation historyboeing.com.au