The Mirage III is a French-designed, supersonic fighter, designed in the late 50’s. Licence built in several countries, including Australia, the Mirage was highly successful and long serving.
Two versions are planned, a smaller EDF and a turbine-powered version in the 8kg class.
Email us with any questions you might have…
Dassault Mirage IIIO – Design, Development, Production and Performance
The Dassault Mirage IIIO was Australia’s first true Mach 2 fighter aircraft and represented a major leap in the Royal Australian Air Force’s air combat capability. Developed from the French Dassault Mirage IIIE, the Mirage IIIO was built under licence in Australia by the Government Aircraft Factories (GAF), with major components including the wings and engines manufactured by the Commonwealth Aircraft Corporation (CAC).
The aircraft served as the RAAF’s principal fighter from 1965 until 1988, undertaking both air defence and ground attack missions. A total of 116 aircraft were acquired, comprising 100 single-seat Mirage IIIOs and 16 two-seat Mirage IIID trainers.
Origins
By the late 1950s the RAAF’s licence-built CAC CA-27 Sabre was approaching obsolescence against the latest Soviet fighters.
In 1960 the Australian Government selected the Dassault Mirage IIIE to replace the Sabre after evaluating several aircraft, including a proposed Rolls-Royce Avon-powered Mirage. Although the Avon version offered superior performance, Australia selected the standard French SNECMA Atar 9C engine because of lower development costs and reduced technical risk.
The Australian version received the designation:
Mirage IIIO
with the suffix “O” signifying Australia.
Development
The first Australian aircraft (A3-1) flew in France on 14 March 1963 and was officially handed over to the RAAF in April 1963.
Australian manufacture was progressively introduced:
- A3-1 and A3-2 built entirely in France
- A3-3 to A3-8 built in France and assembled in Australia
- A3-9 to A3-15 assembled from imported subassemblies
- A3-16 onwards substantially Australian-built
The first Australian-assembled Mirage flew at Avalon, Victoria, on 16 November 1963.
Australian Production Programme
Australia undertook one of its largest post-war aerospace manufacturing projects.
Responsibilities were divided between:
- Government Aircraft Factories (GAF) – fuselage manufacture and final assembly
- Commonwealth Aircraft Corporation (CAC) – wings, tail surfaces and manufacture of the Atar engine under licence
- Numerous Australian subcontractors supplying systems and components
As production matured, Australian content steadily increased until later aircraft were almost entirely locally manufactured.
Variants
Mirage IIIO(F)
The first 48 aircraft (A3-3 to A3-50) were built as dedicated interceptors.
Features included:
- Cyrano IIA radar
- emphasis on air-to-air interception
- Sidewinder missile capability
Mirage IIIO(A)
The remaining 50 aircraft (A3-51 to A3-100) were completed as fighter-ground attack aircraft.
Changes included:
- Cyrano IIB radar
- Doppler navigation
- radar altimeter
- improved low-level navigation
- enhanced strike capability
Beginning in 1969, surviving IIIO(F) aircraft were progressively modified to the IIIO(A) standard, simplifying logistics and fleet management.
Design Philosophy
The Mirage IIIO was intended to provide:
- Mach 2 interception
- all-weather operation
- high climb performance
- nuclear strike capability (not adopted by Australia)
- conventional ground attack
- reconnaissance capability
- ease of maintenance
Unlike previous RAAF fighters, it was designed from the outset as a multi-role supersonic aircraft.
Airframe Design
Wing
The Mirage IIIO employed the famous tailless delta wing.
Characteristics included:
- 60° leading-edge sweep
- thin supersonic aerofoil
- full-span elevons
- large trailing-edge control surfaces
- no horizontal tailplane
Advantages included:
- excellent supersonic performance
- structural simplicity
- large internal fuel volume
- high structural strength
- exceptional climb performance
The delta wing also provided excellent stability at high speed, although it resulted in relatively high landing speeds and greater induced drag at low speeds.
Fuselage
The fuselage was of all-metal semi-monocoque construction.
Features included:
- area-ruled (“wasp waist”) profile
- circular engine intake ducts
- shock cones in the air intakes
- rear-mounted afterburning turbojet
- integral fuel tanks
The variable-position intake cones automatically regulated supersonic airflow to the engine, ensuring efficient operation up to Mach 2.
Cockpit
The cockpit featured:
- pressurised cabin
- Martin-Baker ejection seat
- fighter-style instrument panel
- Cyrano radar display
- gunsight/head-up aiming system
- HOTAS-style throttle and stick layout (for its era)
Although conventional by modern standards, the cockpit was highly advanced for the early 1960s.
Landing Gear
The aircraft utilised a hydraulically retractable tricycle undercarriage.
Features included:
- single-wheel main gear
- steerable nosewheel
- anti-skid braking
- high-pressure tyres for supersonic operations
The landing gear retracted into the fuselage and wing roots, maintaining the aircraft’s clean aerodynamic lines.
Powerplant
The Mirage IIIO was powered by one:
SNECMA Atar 9C
Single-spool axial-flow afterburning turbojet.
Performance:
- Dry thrust: 42.0 kN (9,440 lbf)
- Afterburning thrust: 60.0 kN (13,500 lbf)
The engine was licence-built in Australia by CAC and proved reliable throughout its RAAF service.
Aerodynamic Design
The Mirage III’s aerodynamics were revolutionary.
Major design features included:
- tailless delta wing
- shock-controlled engine intakes
- area-ruled fuselage
- low frontal area
- highly swept leading edge
These enabled:
- sustained Mach 2 flight
- excellent acceleration
- rapid climb
- high-altitude interception
The aircraft could routinely exceed 60,000 ft in zoom climbs under operational conditions.
Armament
Internal armament consisted of:
- 2 × 30 mm DEFA 552 revolver cannon
External stores included combinations of:
- AIM-9 Sidewinder missiles
- Matra R.530 radar-guided missiles
- unguided rockets
- bombs
- napalm
- external fuel tanks
Maximum external load was approximately 4,000 kg (8,800 lb), depending on mission configuration.
Production
Australian Orders
| Order | Aircraft |
|---|---|
| Initial order (1961) | 30 |
| Second order (1962) | 30 |
| Third order (1963) | 40 |
| Two-seat trainers | 16 |
Total procurement:
- 100 Mirage IIIO
- 16 Mirage IIID
Production ran from 1963 to 1968, with the 100th and final single-seat aircraft (A3-100) delivered in December 1968.
Operational Service
The Mirage equipped:
- No. 2 Operational Conversion Unit
- No. 3 Squadron
- No. 75 Squadron
- No. 76 Squadron
- No. 77 Squadron
- No. 79 Squadron
The type also served extensively at RAAF Butterworth in Malaysia as part of Australia’s commitment to the Five Power Defence Arrangements and regional air defence.
Specifications
| Item | Specification |
|---|---|
| Crew | 1 |
| Length | 15.03 m (49 ft 4 in) |
| Wingspan | 8.22 m (27 ft 0 in) |
| Height | 4.50 m (14 ft 9 in) |
| Wing Area | 34.8 m² (375 sq ft) |
| Empty Weight | Approximately 7,050 kg (15,543 lb) |
| Maximum Take-off Weight | 13,700 kg (30,203 lb) |
| Engine | 1 × SNECMA Atar 9C afterburning turbojet |
| Dry Thrust | 42.0 kN (9,440 lbf) |
| Afterburning Thrust | 60.0 kN (13,500 lbf) |
Performance
| Performance | Value |
|---|---|
| Maximum Speed | Mach 2.2 (2,350 km/h; 1,270 kt) at altitude |
| Cruise Speed | Approximately 950 km/h (513 kt) |
| Initial Rate of Climb | Approximately 16,500 ft/min (84 m/s) |
| Service Ceiling | Over 58,000 ft (17,700 m) |
| Ferry Range | 3,335 km (2,072 mi) with external tanks |
| Combat Radius | Approximately 650–800 km (mission dependent) |
| Take-off Run | Approximately 1,100 m (typical combat weight) |
Flying Characteristics
The Mirage IIIO was admired for its:
- exceptional supersonic acceleration
- rapid climb to interception altitude
- precise high-speed handling
- excellent roll response
- stable weapons platform
Pilots reported that the aircraft was straightforward to fly at high speed but demanded careful energy management during approach and landing. The tailless delta wing produced benign stall characteristics, yet approach speeds were relatively high—typically around 170 knots—and maintaining speed throughout the landing flare was essential.
Retirement and Legacy
By the early 1980s, advances in radar, missile technology and multi-role fighter design highlighted the Mirage IIIO’s limitations. The RAAF selected the McDonnell Douglas F/A-18A Hornet as its replacement, with Mirage retirement completed in 1988 after more than two decades of service. Approximately 50 surviving aircraft were subsequently sold to the Pakistan Air Force, where many continued flying after extensive upgrades.
The Mirage IIIO occupies a significant place in Australian aviation history. It was Australia’s first operational Mach 2 fighter, the largest and most technologically advanced combat aircraft produced under licence in the country at the time, and a catalyst for the growth of Australia’s aerospace industry through the collaborative efforts of GAF and CAC. Its combination of advanced French aerodynamic design and Australian manufacturing expertise produced a highly capable fighter that served with distinction throughout the Cold War.