Austro-Daimler
A 1912 Austro-Daimler 6 on display at the Porsche Museum
Type 6-cyl. water-cooled in-line piston engine
National origin Austria
Manufacturer Austro-Daimler
First run 1910
Variants Beardmore 120 hp

The Austro-Daimler 6 was a series of Austrian six-cylinder water-cooled inline aero engines first produced in 1910 by the Austro-Daimler company.

Design and development

The first Austro-Daimler six-cylinder engine was designed by Dr-Ing Ferdinand Porsche to be an aircraft engine from the outset. Of high quality manufacture, the Austro-Daimler was modestly rated at relatively low rpm, which gave the engine family a reputation for robustness and reliability.[1]

Features of the Austro-Daimler included welded steel water jackets (originally copper), seven main bearings and large diameter inclined inlet and exhaust valves opened by dual action push-pull rods and closed by spring pressure.[1]

The single-overhead cam (SOHC) valvetrain of later engines was driven from the crankshaft through the usual vertically-oriented shaft as the contemporary Mercedes D.III was, but the Austro-Daimler had its vertical camshaft drive system mounted at the front of the engine instead, and not the usual aft-end placement of other Central Powers straight-six SOHC liquid-cooled aircraft powerplants, like the Mercedes and BMW designs.

The Austro-Daimler inspired many imitators such as the Mercedes D.II, Benz Bz.IV and Hiero 6. Limited availability of the Austro-Daimler engines forced some aircraft manufacturers to substitute Mercedes (the German Daimler company) engines in their aircraft, due to greater availability.[1] From 1913, the 90 and 120 hp models were produced under license in Scotland by William Beardmore and Company. The Beardmore 120 hp went on to power many British military aircraft during WW1.[2]

Variants

Data from:[1]

Austro-Daimler 90 hp 6-cyl.
The original low capacity version developing 90 hp (67.11 kW), introduced in 1910.
Austro-Daimler 120 hp 6-cyl.
Up-rated with a capacity of 13.9 L (848.23 cu in), from 130 mm (5.12 in) bore and 175 mm (6.89 in) stroke, developing 120 hp (89.48 kW) at 1,200 rpm, introduced in 1911.
Austro-Daimler 160 hp 6-cyl.
developing 160 hp (119.31 kW), introduced in 1913.
Austro-Daimler 185 hp 6-cyl.
developing 185 hp (137.95 kW), introduced in 1916.
Austro-Daimler 200 hp 6-cyl.
Up-rated with a capacity of 15.03 L (917.19 cu in), from 135 mm (5.31 in) bore and 175 mm (6.89 in), developing 200 hp (149.14 kW) at 1,350 rpm, introduced in December 1916.[3]
Austro-Daimler 210 hp 6-cyl.
210 hp (156.60 kW), introduced in late 1917.
Austro-Daimler 225 hp 6-cyl.
developing 225 hp (167.78 kW), introduced in 1918.

Applications

Specifications (Austro-Daimler 120 hp)

A 147 kW (197 hp) Austro-Daimler fitted to an Aviatik (Berg) D.I, on display at the Vienna Technical Museum

General characteristics

  • Type: 6-cylinder liquid-cooled inline engine
  • Bore: 130 mm (5.12 in)
  • Stroke: 175 mm (6.89 in)
  • Displacement: 13.9 L (850.5 cu in)
  • Length: 1,690 mm (66.5 in)
  • Width: 520 mm (20.47 in)
  • Height: 1,040 mm (41 in)
  • Dry weight: 320 kg (705 lb)

Components

  • Fuel system: Carburetor

Performance

  • Power output: 120 hp at 1,200 rpm

See also

Comparable engines

Related lists

Footnotes

  1. 1 2 3 4 Gunston 2006
  2. ↑ Lumsden, Alec (2002). British Piston Engines and their Aircraft. Airlife Publishing. pp. 80–81. ISBN 1853102946.
  3. ↑ Grey 1969
  4. ↑ Jane 1969, p. 18

References

Wikimedia Commons has media related to Austro-Daimler 6.
  • Angelucci, Enzo (1980). The Rand McNally Encyclopedia of Military Aircraft 1914–1980. p. 102.
  • Grey, C. G. (1969) [1919]. Jane's All the World's Aircraft 1919. David & Charles Publishing Ltd. pp. 1b–145b. ISBN 0-7153-4647-4.
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