The Austro-Daimler 6 was a series of

Austria Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous ...

n six-cylinder

water-cooled Cooling tower and water discharge of a nuclear power plant Water cooling is a method of heat removal from components and industrial equipment. Evaporative cooling using water is often more efficient than air cooling. Water is inexpensive and non ...

inline

SOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion cha ...

aero engines first produced in 1910 by the

Austro-Daimler Austro-Daimler was an Austro-Hungarian automaker company, from 1899 until 1934. It was a subsidiary of the German ''Daimler-Motoren-Gesellschaft'' (DMG) until 1909. Early history In 1890, Eduard Bierenz was appointed as Austrian retailer. The com ...

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. 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. 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 The Mercedes D.II was a six-cylinder, SOHC valvetrain liquid-cooled inline aircraft engine built by Daimler during the early stages of World War I. Producing about 110 to 120 hp, it was at the low-end of the power range of contemporary eng ...

Benz Bz.IV The Benz Bz.IV was a German six-cylinder, water-cooled, inline engine developed for aircraft use. Deliveries began in 1916, and some 6,400 were produced. Design and development The Bz.IV was a dual-camshaft design, with two intake and two exhau ...

Beardmore Beardmore can refer to: *Andrew Beardmore, better known as Andy Moor, English trance DJ, producer and remixer *Bob Beardmore, British rugby league footballer *Bud Beardmore (1939–2016), American lacrosse coach *Jim Beardmore, Former All-American ...

, and

Hiero 6 In 1914 Otto Hieronimus manufactured the six-cylinder Hiero E, also known as the Hiero 6 engine which was derived from earlier 4-cylinder engines. The Hiero engine like the Austro-Daimler powered many of Austria's World War I aircraft. Hiero air ...

. 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.

Variants

''Data from: ;Austro-Daimler 90 hp 6-cyl. :The original low capacity version developing , introduced in 1910. ;Austro-Daimler 120 hp 6-cyl. : Up-rated with a capacity of , from bore and stroke, developing at 1,200 rpm, introduced in 1911. ;Austro-Daimler 160 hp 6-cyl. :developing , introduced in 1913. ;Austro-Daimler 185 hp 6-cyl. :developing , introduced in 1916. ;Austro-Daimler 200 hp 6-cyl. : Up-rated with a capacity of , from bore and , developing at 1,350 rpm, introduced in December 1916. ;Austro-Daimler 210 hp 6-cyl. :, introduced in late 1917. ;Austro-Daimler 225 hp 6-cyl. :developing , introduced in 1918.

Applications

* Albatros D.II (Oef) (Austro-Daimler 185 hp 6-cyl.) * Albatros D.III (Oef) (Austro-Daimler 200 hp 6-cyl.) * Aviatik B.I *

Aviatik B.II ''Note:'' Not to be confused with the Austro-Hungarian Aviatik B.II series 32, 32.7 and 34 which were different aircraft. The Aviatik B.II was a reconnaissance aircraft built in Germany during World War I. Design and development The (German) Av ...

Aviatik D.I The Halberstadt D.II was a biplane fighter aircraft developed and manufactured by German aircraft company Halberstädter Flugzeugwerke. It was adopted by the ''Luftstreitkräfte'' (Imperial German Army Air Service) and served through the period ...

Etrich VII The Etrich VII monoplane was designed by Igo Etrich and first flown in 1911. Some were sold to European militaries, including Russia, Germany and Austria-Hungary. Specifications Operators * :*Austro-Hungarian Imperial and Royal Aviation Troops ...

* Hansa-Brandenburg C.I *

Hansa-Brandenburg D.I The Hansa-Brandenburg D.I, also known as the KD (''Kampf Doppeldecker'') was a German fighter aircraft of World War I. Despite poor handling characteristics it was put into service by Austria-Hungary, where some aircraft served until the end of ...

Lohner C.I The unarmed Lohner B.VII and its armed derivative the C.I were military reconnaissance aircraft produced in Austria-Hungary during World War I.Taylor 1989, 610–11 They were the ultimate developments in a family of aircraft that had begun with ...

Lohner Type AA The Lohner Type AA (a.k.a. Lohner 10.20, 10.20A, 10.20B, 111.01, 111.02, 111.03, Lohner Dr.I and Lohner D.I) were a series of prototype fighters built during World War I. The program would eventually be cancelled due to inherent instability conce ...

(Austro-Daimler 185 hp 6-cyl.)

Specifications (Austro-Daimler 120 hp)

Footnotes

References