In the early twenties Lucian Rozengart founded Society on development of the French automotive industry, in abbreviated form from the French name – SADIF. This organization then played a huge role in the history of Citroen carmaker when that appeared on the verge of bankruptcy. Society allocated to Citroen firm a large sum of money for overcoming of financial difficulties. At that time the debt of the company exceeded a total cost of all not sold Citroen cars. Thanks to this loan, the carmaker of France conducting now undertook designing of new cars which were quickly enough started in a mass production.
Quite so Lucian Rozengart became the famous person among large auto makers and won good reputation. After that Rozengart appeared the technical director of the company of Peugeot, but in 1928 opened the own enterprise.
The same year at the Parisian automobile exhibition visitors saw the first car which was published under the name of Rosengart. It was the LR-2 model which was equipped with the 0,75 liters four-cylinder engine. On the bigger account, the car was similar to the known Austin Seven model as Lucian Rozengart bought the right for its production. The Rosengart LR-2 car differed from Austin Seven in some details of a body, for example, the chromeplated overlay for a radiator. It was the nuance, very widespread in France.
In 1930 the LR-4 model with the modernized design, and then and LR-44 on which extended wheel base was let out. Subsequently on the basis of LR-44 developed LR-62 – the car which equipped with the small six-cylinder Austin motor of 1,1 liters. It should be noted that the body of Rosengart cars interested then other companies. And on its basis the BMW firm created an all-metal body for one of the first serial cars.
In 1930 the Rosengart company cooperated also with other French firm Unic (Yunik). Model 14/15CV equipped with the 2,6 liters 8-cylinder motor with the top valves was in common let out. The back suspension bracket was used on console springs. But in anticipation of an economic crisis big and comfortable expensive car was not demanded.
In 1932 Lucian Rozengart bought the license for production of the German front-wheel Adler Trumpf model. The car started in a mass production differed in nothing from the original, besides the emblem. In 1933 the car was improved therefore it was renamed into LR-500, or Supertraction-G. Externally it was the same Adler Trumpf model. Only in 1934 at an automobile exhibition in Paris the car option with an aerodynamic body which two more years didn't start in production was shown.
At the same time production of the previous models on the basis of Austin Seven proceeded. Now it was the LR-4N2 car. All this series at that time gathered with use of a forward independent suspension bracket.
In 1939 the LR-539 car, or Supertraction-m was presented. It was also front-wheel drive vehicle collected on the Citroen-11BL chassis with an original aerodynamic body. The Supertraction-M model was equipped with the line 4-cylinder engine with the top valves with a working volume of 2 liters and 54 horsepowers. The car with a mechanical 3-staged transmission, and also an independent lever and torsion suspension bracket with hydroshock-absorbers on all wheels was completed. Brakes were drum with a hydraulic actuator. As a result the Supertraction-M car could gather speed to 115 km/h.
After the end of World War II the management of the Rosengart company switched to production of the front-wheel drive vehicles, only more expensive though experience of production of such cars already appeared in cooperation with the Unic company earlier. So the Supertrahuit model equipped with the 8-cylinder Mercury engine with a working volume of 3,9 liters was published. However in post-war time expensive cars weren't in special demand, and release of this model had to be stopped. In production the cars developed on the basis of Austin Seven were started again. In 1952 let out two models – Ariette and Artisane equipped with motors which volume didn't exceed 0,75 liters.
In 1954 the Rosengart Sagaie model which was equipped with the opposite two-cylinder Panhard Dyna engine with the top valves and air cooling was presented. The working volume of this power unit made 0,85 liters. The Rosengart Sagaie car could accelerate to 120 km/h. But this model was noncompetitive, in particular, in comparison with development of the Renault and Panhard companies which took the leading positions in the automobile building market of France. As a result in 1955 the Rosengart firm was compelled to stop the existence.
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