Sampo Rosenlew's 2ROTO hybrid combines entered production for the 2021 season. The rasp bars had been replaced with two rotors, which was promised to increase threshing capacity by over 30%. The engine was the same 300-horsepower unit as in the C12 model. The rotors were 383 cm long and 47 cm in diameter. The rotors were driven by belts through a gearbox, and the speed could be adjusted in three steps. The grain elevator and grain augers were enlarged, and the fan was more powerful than in the rasp bar versions. The widest, 6.9-meter cutting table had a chain-driven feed auger. An automatic cutter bar tilt was available as an optional extra. The C20 model had one threshing drum, while the C22 and C24 models had two. The variator belt was equipped with automatic tensioning. All control devices were located on the armrest, the drive handle, and the monitor. The monitor was a 12.3-inch Comvision II touchscreen with 38 memory slots for settings.

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