CAC CA-15

CA-15 "Kangaroo"
Role Fighter
National origin Australian
Manufacturer Commonwealth Aircraft Corporation
First flight 4 March 1946
Retired 1950
Status Scrapped
Primary user Royal Australian Air Force
Number built 1

The CAC CA-15, also known unofficially as the CAC Kangaroo, was an Australian propeller-driven fighter aircraft designed by the Commonwealth Aircraft Corporation (CAC) during World War II. Due to protracted development, the project was not completed until after the war, and was cancelled after flight testing, when the advent of jet aircraft was imminent.

Design and development

The CA-15 after crash landing at RAAF Point Cook

As the limitations of the CAC Boomerang became more and more obvious against the Mitsubishi A6M Zero during 1942, Sir Lawrence Wackett proposed designing a new advanced performance fighter from scratch with Fred David heading an in-house CAC design team.[1] During 1943, following the success of CAC and chief designer Fred David, in rapidly designing and mass-producing the small Boomerang fighter for the Royal Australian Air Force (RAAF), CAC began design work on a fully fledged interceptor and bomber escort. In June 1943 the Royal Australian Air Force approved the design concept proposal and issued design specification 2/43 for work to commence [2]

Although the CA-15 bore a superficial resemblance to the North American P-51 Mustang,[3] the CAC design was not based directly on the American aircraft and had quite different performance objectives and dimensions.[3] For instance, David had been impressed by assessments of captured Focke-Wulf Fw 190s[4] and intended using a radial engine rather than the inline engines used in fighters like the Mustang. In fact, development of the CA-15 was slowed by a recommendation from CAC head Lawrence Wackett, that the company build Mustangs under licence, rather than bear the cost of developing a unique design. By the later stages of its development, it was believed that the CA-15 would have capabilities enabling it to replace the P-51.[5]

At first, the CAC designers planned to use the 2,300 hp (1,715 kW) radial Pratt & Whitney R-2800, with a turbocharger. However, that engine became unavailable,[6] causing further delays in development, and it was decided to fit an in-line Rolls-Royce Griffon Mk 61 (2,035 hp/1,517 kW). Engines for a prototype were leased from Rolls-Royce.[5] It was intended that any production engines would have a three-stage supercharger.

Operational history

The CA-15, piloted by Flt Lt J.A.L. Archer, over Melbourne, photographed from the rear turret of an Avro Lincoln bomber

Development was further slowed by the end of the war, with the prototype flying for the first time on 4 March 1946,[6] and was flown by CAC test pilot Jim Schofield, who also flew the first Australian built P-51. The prototype was assigned RAAF serial number A62-1001. According to aviation historian Darren Crick, it achieved a calibrated level flight speed of 448 mph (721 km/h) at 26,400 ft (8,046 m). Test flights came to an abrupt ending when Flt Lt J. A. L. Archer suffered a hydraulic failure (later found to be a leaking ground test gauge) on approach to Point Cook on 10 December 1946, which left him no choice but to orbit and burn off fuel. The main gear was only halfway down and unable to be retracted or lowered any further but the tail wheel was down and locked. On landing, the tail wheel struck the airstrip first causing the aircraft to porpoise and finally, the airscoop dug in. The aircraft settled back on the fuselage and skidded to a stop, heavily damaged.[5] After repairs at CAC, the aircraft was returned to ARDU in 1948. Archer reportedly achieved a speed of 502.2 mph (803 km/h) over Melbourne, after levelling out of a dive of 4,000 ft (1,200 m), on 25 May 1948.

By this time, however, it was clear that jet aircraft had far greater potential and no further examples of the CA-15 were built. The prototype was scrapped in 1950, and the engines were returned to Rolls-Royce.[5]

Operators

 Australia

Specifications

CA-15

Data from Commonwealth CA-15: The 'Kangaroo' Fighter[7]

General characteristics

Performance

Armament

  • Guns: 6 × 0.50 in. (12.7 mm) machine guns (250 rounds each)
  • Rockets: provision for 10 × rockets
  • Bombs: 2 × 1,000 (450 kg) bombs

See also

Aircraft of comparable role, configuration and era

Related lists

References

Notes

  1. ↑ Martin, RL (1994). "The CA-15 Fighter: An Item of Aeronautical Engineering Heritage Australasian Conference on Engineering Heritage (1st : 1994 : Christchurch, N.Z.)". Institution of Engineers, Canberra, 1994: 115-120.
  2. ↑ Martin, RL (1994). "The CA-15 Fighter: An Item of Aeronautical Engineering Heritage Australasian Conference on Engineering Heritage (1st : 1994 : Christchurch, N.Z.)". Institution of Engineers, Canberra, 1994: 115-120.
  3. 1 2 Air Enthusiast October 1972, p. 179.
  4. ↑ Ross 1995, p. 321.
  5. 1 2 3 4 Crick 2003
  6. 1 2 Wilson, Stewart (1994). Military Aircraft of Australia. Weston Creek, Australia: Aerospace Publications. p. 216. ISBN 1875671080.
  7. ↑ Donald 1996, p. 121.

Bibliography

  • Crick, Darren. "RAAF A62 CAC CA-15" adf-serials.com, 2003.
  • Donald, David. "Commonwealth CA-15: The 'Kangaroo' Fighter". Wings of Fame, Volume 4, 1996, pp. 118–121. London: Aerospace Publishing. ISBN 1-874023-71-9. ISSN 1361-2034.
  • Francillon, René J. The Royal Australian Air Force & Royal New Zealand Air Force in the Pacific. Fallbrook, California: Aero Publishers Inc., 1970. ISBN 0-8168-0308-0.
  • Green, William, ed. "Antipodean Finale". Air Enthusiast, October 1972, Vol. 3. No 4, pp. 178–180.
  • Martin, RL (1994). "The CA-15 Fighter: An Item of Aeronautical Engineering Heritage Australasian Conference on Engineering Heritage (1st : 1994 : Christchurch, N.Z.)". Institution of Engineers, Canberra, 1994: 115-120.
  • Ross, A.T. Armed and Ready: The Industrial Development and Defence of Australia 1900-1945. Wahroonga, New South Wales, Australia: Turton & Armstrong, 1995. ISBN 0-908031-63-7.
  • Wilson, Stewart. Wirraway, Boomerang & CA-15 in Australian Service. Fyshwick ACT, Australia: Aerospace Publications Pty. Ltd., 1991. ISBN 0-9587978-8-9.
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