Ae110 Engine Diagram.
Each has a gap to allow for expansion. As well as the rotor apex seals evident in the conceptual diagram the rotor must also seal against the chamber ends. The sealing at the apexes of the wankel rotor is less.
Piston rings in reciprocating engines are not perfect seals.
Piston engine in three dimensions the opposite is true. The sealing at the apexes of the wankel rotor is less. The new england journal of medicine provides a collection of articles and other resources on the coronavirus covid 19 outbreak including clinical reports management guidelines and commentary. Piston rings in reciprocating engines are not perfect seals.