Wilfried Herold - Die Wechselfestigkeit Metallischer Werkstoffe 1934.

Die Wechselfestigkeit Metallischer Werkstoffe: Ihre Bestimmung und Anwendung.
Julius Springer Verlag, Wien 1934.
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ÖAF is an initialism for Österreichische Automobil-Fabrik (literally Austrian automobile factory), previously known as Österreichische Austro-Fiat, an Austrian (Austro-Hungarian) car and truck manufacturer that now is completely incorporated into MAN.
Austro-Fiat
Share of the Oesterreichischen Automobil-Fabriks-AG, issued 15. May 1930

ÖAF was created by Fiat in 1907 and is now part of the German MAN group. The manufacture of automobiles began in the new plant built for the occasion in Vienna in 1908, while the number was only 50 employees. A truck of 4 tonnes, similar to the Italian Fiat model was manufactured from 1911. It was originally Austro-Fiat, which during the First World War began to develop their own products.

In 1925 the Austro-Fiat brand expired and the company became Österreichische Automobil Fabrik AG, under the abbreviation ÖAF, with preservation of the trademark filed earlier. Also in 1925, a separate company took over sales of Italian Fiat cars, and Austro-Fiat became affiliated with Austro-Daimler and Puch. The last private car, Type 1001A, was different from the earlier Type 1001, having 34 bhp (25 kW) engines and conventional rear axles.

The latest model Fiat's truck was TS 1924, equipped with a 45 hp (34 kW) Fiat engine. The company began production of other models in Austria, which has enabled the company to begin developing its own models. The most popular submitted in 1925 was the AFN light truck with 1.75 tons of payload. This truck used a 42 hp, 2850 cc 4 cylinder Fiat engine. It also used gimbals and pneumatic instead of solid tires, which allowed for a speed of 65 km/h. In 1928, the AF2 appeared and the following year a bus called the Austro-Fiat-1001. It is from this time that the company discontinued the manufacture of passenger cars to concentrate on commercial vehicles, trucks, vans and buses. This allowed the AFL/AFY to be manufactured from 1930 to 1937.
MAN acquisition
Austrian Army ÖAF-sLKW truck

In 1938, when Austria was annexed by the Third Reich, German MAN obtained the majority of shares owned by Fiat in ÖAF, reducing the Italian firm's share to 15%. ÖAF had begun equipping some of its trucks with diesel engines from MAN in 1934.