RecreationalTillage - 11/1/2026 08:02 That's the crop's perspective of what it is seeing from the rotor, not the reflected inertia back to the engine. Will give a shot at explaining with the caveat of it's been many decades since engineering classes at the university. Imagine a stereotypical American farm daycab semi tractor, with a 10-speed, loaded up to 80k, cruising down a flat road at 60 mph. The truck has lots of inertia, just like a 2nd gear rotor spinning at 600+ rpm in a combine. The truck encounters a small hill and the engine is able to grunt in 10th gear and crest the hill without loosing many mph over those few seconds of the hill because the truck's inertia carried the engine through the increased load. With the truck back on level ground, it next encounters the I-70 grade going west up to the Eisenhower tunnels. Since the increased load is no longer a temporary impulse, but steady state, the inertia of the truck can no longer be maintained and the load in the engine increases in tenth gear to the point one must downshift or the engine will stall. This would be the equivalent of leaving the rotor in second gear harvesting corn. The increased crop mass and load of corn going through rotor is now continuous compared to that brief momentary slug in wheat or soybeans.