[Werner]

Thank you for your effort!


I must apologize, that my American vocabulary is not sufficient to fully understand the last two explanations. But it seems that the beads work, even if I don't understand why.


(In Germany, the rotary engine was invented in the 1960s by Felix Wankel + NSU car manufacturer.

The engine did not catch on. "Evil tongues" claim that this is because no one understood how it worked. But the principle still works well.)