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D.4
The sixth UK built Auster D4 outside the Rearsby factory in August 1967
General information
Type	Utility aircraft
Manufacturer	Auster, OGMA
Status	one example still active in UK in 2018
Primary user	Portuguese Government
Number built	15
History
Introduction date	1960
First flight	12 February 1960
Developed from	Auster Arrow

The Auster D.4 was a two-seat British light aircraft, a development of the Auster Arrow with a horizontally opposed Lycoming engine, which originated from a Portuguese Air Force requirement for a liaison/training aircraft. Six were built by Auster Aircraft at their Rearsby, Leicestershire, factory, of which five went to Portugal, and nine more were built under licence in Portugal by the Oficinas Gerais de Material Aeronáutico OGMA from sets of components built by Auster and shipped from Rearsby. The original contract was for 25 sets of components but this was reduced in favour of the same number of additional Auster D5/160 sets.

Operational history

Most D4 aircraft were operated in Portugal by government sponsored groups. One example is still active (2018) owned by a UK-based private pilot owner.

Operators

 Portugal

• Portuguese Air Force

Specifications

Data from British Civil Aircraft since 1919: Volume I.

General characteristics

• Crew: 1
• Capacity: 2 passengers
• Length: 23 ft 4+1⁄2 in (7.125 m)
• Wingspan: 36 ft 0 in (10.97 m)
• Height: 7 ft 11 in (2.41 m)
• Wing area: 185 sq ft (17.2 m)
• Empty weight: 1,232 lb (559 kg)
• Gross weight: 1,900 lb (862 kg)
• Powerplant: 1 × Lycoming O-235 air-cooled flat-four engine, 108 hp (81 kW)

Performance

• Maximum speed: 110 mph (180 km/h, 96 kn)
• Cruise speed: 92 mph (148 km/h, 80 kn)
• Range: 500 mi (800 km, 430 nmi)
• Service ceiling: 13,200 ft (4,000 m)
• Rate of climb: 620 ft/min (3.1 m/s)

References

1. ^ Wenham 2015, p.42
2. Jackson 1974, pp. 186–188
3. Jackson 1974, p. 188.

• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 85.
• Simpson, R. W. (1995). Airlife's General Aviation. Shrewsbury: Airlife Publishing. p. 43.
• Jackson, A.J. (1974). British Civil Aircraft since 1919 Volume 1. London: Putnam. ISBN 0-370-10006-9.
• Wenham, Tom (2015). False Dawn - The Beagle Aircraft Story. Air-Britain. ISBN 978-0-85130-479-3.

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