Next to it, a Pallas carburetor was “hung up” featuring the upcoming flow of the combustion mixture, and the intake of the warmed-up air was provided via the long junction pipe from the rear cylinder. The Mars engine got a very ingenious gas distribution mechanism: a camshaft located in the upper part of the assembly and driven by two spur pinions from the crank-shaft was directly driving four complex-shaped crossbeams, each if which controlled its own valve.
The engine together with the box-type frame made up a single power assembly which also included the sump of the two-speed transmission. The motorcycle transmission deserves special attention: two drums with internal friction pads were located on the cross shaft. Each drum had own chain connected to the rear wheel, so there were two chain sprockets at the rear. During the gear selection, one of the drums was decelerated and the torque was transmitted to the rear wheel. Band brake gears were located over the lead drums: one gear with the manual and the other with foot control.
Mars A20 was also a sports model. Factory drivers Ernest Schulz and Heinz Wilhelm are here on White Mars motorcycles when they took the first and second prizes during Bavarian championship in 1921.
The engine was started with a hand crank (like in cars) using a special actuator. The wheels were made interchangeable since their flanges did not have braking mechanisms. More so, even with the single-rider option, the Mars A20 could carry a spare wheel on the right side. A short leading link of a very complex design completed the look of the motorcycle.
White Mars was manufactured until 1932 subjected to constant modernization. Just over one thousand machines were produced.
|Manufacturer||Mars Werke, AG, Nuremberg (Germany)|
|Years of manufacture||1920-1932|
|Quantity produced, units||1 000|
|ENGINE AND TRANSMISSION|
|Type||L-head, horizontally-opposed, twin-cylinder|
|Engine capacity, cc||956|
|Bore and stroke, mm||80 х 95|
|Engine rating||12 h.p.|
|FRAME AND WHEELBASE|
|Frame type||Box-type carrying frame|
|Front suspension||Short leading link, of complex design|
|Wheel size||3,0 х 22|
|Ground clearance, mm||
|Gas tank size, l||
|Maximum speed, km/h||