Alfred Evert
Threefold-crank-concept - Animation

With that simple animation, three motions can be looked at:

Rotor-arm - crank
Around the system-axis (blue point), the rotor-arm will turn, the blue line here. This turning ist constant (what will be achieved, when several modules are installed, each with correspondingly different direction of excentrity). The mass of that crank is without effect.

Excenter-arm - crank
Around the excenter-axis (red point), the excenter-arm will turn, the red line here. That turning is variing: left side are slow motions, upside acceleration, right side will overtake the rotor-arm with high speed, below running ahead the rotor-arm, slowing down to the left, so the rotor-arm again will overtake the excenter-arm. These variable motion is quite effective to the system.

Rotor - crank
Outside at both these arms, the rotor-crank turnable is mounted by the rotor-axis and the rotor-excenter, here the green line. At the end of that crank, the effective mass should be concentrated (green point). The position respectivly the turning motion of that crank will result of the relative positions of the cranks above. While the system will do one full turn, this rotor-crank will make a ´salto´. Left side is the inner dead point. By a flat curve, the mass will fall outside, will be acceleratet to high speed upside, will have maximum speed right side.

There, that high kinetic energy now will pull the decisive slower rotor-arm behind. Thus, the mass by the excenter-arm will sling towards inside, back to the inner point of the mass track.

Basic principle
That procedure of motion in principle is basis for using the sling-effect, will say in general to the usage of inertia within maschines. That principle also will be valid, when these diverse bearings are included one within the other. So, the following designs of engines, no longer will show that wilderness of cranks, nevertheless, same conciderations in principle will be valid, the effect of forces by slinging mass outside and towards inside as well.

Evert / 18.02.2000

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