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[simfphys] Mercedes-Benz Typ 290 W18

The Mercedes-Benz W18 was a six-cylinder automobile introduced as the Mercedes-Benz Typ 290 in 1933. It was a smaller-engined successor to the manufacturer’s Typ 350 / 370 Mannheim model. In terms of the German auto-business of the 1930s it occupied a market position roughly equivalent to that filled by the Mercedes-Benz E-Class in the closing decades of the twentieth century. The W18 was replaced in 1937 by the manufacturer’s W142 (Typ 320). Several different models with names incorporating the number “290” were produced by Mercedes-Benz during the 1930s, so that for the avoidance of ambiguity the car is frequently identified using the manufacturer's Works Number as the Mercedes-Benz W18. The six-cylinder 2,867 cc side-valve engine produced a maximum output of 60 PS (44 kW; 59 hp) at 3,200 rpm. In 1935 the compression ratio was increased along with maximum power which was now given as 68 PS (50 kW; 67 hp). Power was delivered to the rear wheels via a four-speed manual transmission with synchromesh on the top two ratios. On standard-bodied cars, the 1:1 ratio was achieved with third gear, leaving the fourth ratio as an “overdrive” ratio. The rear wheels were attached to a swing axle while at the front a lateral leaf spring was complemented by a pair of coil springs. The footbrake applied stopping power to all four wheels via a hydraulic control mechanism.