File:Ursus C45 (7522017980).jpg

7. Oldtimertreffen am 07.07.2012 in Greußen/Thüringen.

Ursus ist ein polnisches Unternehmen im Warschauer Stadtteil Ursus, welches heute vor allem Traktoren produziert. Das bekannteste Produkt des Unternehmens ist der Ursus C-45, der nach dem Zweiten Weltkrieg hergestellte Nachbau des Lanz Bulldog D 9506. Am 1. Mai 1947 konnte der erste Ursus C-45 das Werk verlassen. Bis zum Ende der Produktion im Jahr 1959 soll Ursus 60.000 Stück dieses Typs in verschiedenen Varianten hergestellt haben.

Der Ursus C 45 entsprach in nahezu allen Einzelheiten dem Original: Einzylinder-Glühkopfmotor, Hubraum 10.338 cm³, 32,9 kW (45 PS), Geschwindigkeit ca. 3 bis 16 km/h, Bauzeit: 1947 bis 1959

The Ursus Factory is a Polish producer of agricultural machinery located in Warsaw. The Ursus C-45 was a popular Polish model of tractor. It was manufactured from 1947 to 1959 by the Ursus Factory in Warsaw, and from 1960 to 1965 by Zakłady Mechaniczne in Gorzów Wielkopolski. Production of the Ursus C-45 model began in 1946. Due to the need to begin production quickly, the Ursus company decided to copy the Lanz Bulldog D9506. Examples of this German model were prevalent in Poland near the German border, left behind following World War II. Apart from its proximity and prevalence, the model also was advantageously high-powered relative to its simple construction and operation. Technical documentation for the C-45 was completed in July 1946 and was carried out under the guidance of Edward Habich. Under the designation LB-45, Habich built the first prototype in 1947, which was presented at the Labour Day parade in Warsaw on 1 May. Full production of the tractors was launched in September, with 130 units built by the end of 1947.

The C-45 had a one-cylinder, two-stroke engine, with a maximum power of 33 kW (45 hp) and a cylinder capacity of 10,300 cc. The gearbox was 3-speed and the cylinder was placed horizontally. To start the engine, it was first heated by a blow lamp. Then, the steering wheel was removed, along with the column, and slid into one of the flywheels. By then turning the steering wheel, the engine was started. This process required physical strength and skill.

At the beginning of its production life, the C-45 was manufactured with steel wheels. Modernising modifications were made to the tractor in later years, resulting in the improved C-451.