Austro-Daimler 6

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TMW - Aviatik D 1 1.jpg
A 147 kW (197 hp) Austro-Daimler fitted to an Aviatik D.I, on display at the Vienna Technical Museum
Type 6-cyl. water-cooled in-line piston engine
National origin Austria
Manufacturer Austro-Daimler
First run 1910

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

Design and development[edit]

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 valvetrain 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, Beardmore, and Hiero 6. Modest 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]


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.[2]
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.


Specifications (Austro-Daimler 120 hp)[edit]

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)


  • Fuel system: Carburetor


  • Power output: 120 hp at 1,200 RPM

See also[edit]

Comparable engines

Related lists


  1. ^ a b c d Gunston, Bill (2006). World Encyclopedia of Areo Engines (5th ed.). Stroud: Sutton Publishing. p. 18. ISBN 0-7509-4479-X. 
  2. ^ Grey, C.G. (1969). Jane's All the World's Aircraft 1919 (Facsimile ed.). David & Charles (Publishing) Limited. pp. 1b to 145b. ISBN 0-7153-4647-4. 
  • Gunston, Bill. (1986). World Encyclopaedia of Aero Engines. Patrick Stephens: Wellingborough. p. 18
  • Angelucci, Enzo. (1980). "The Rand McNally Encyclopedia of Military Aircraft 1914–1980". p. 102
  • Grey, C.G. (1969). Jane's All the World's Aircraft 1919 (Facsimile ed.). David & Charles (Publishing) Limited. pp. 1b to 145b. ISBN 0-7153-4647-4.