The discussion centers on the challenges of evaluating a new toroidal internal combustion engine design, particularly regarding its thrust-to-weight ratio and efficiency. Participants express skepticism about the feasibility of the design, highlighting issues with sealing, power transmission, and heat transfer. There is a call for better visual explanations and simulations to clarify the concept, as many find the current diagrams confusing. The conversation also touches on the difficulty of calculating efficiency without established prototypes or models, with suggestions to reference existing engine designs for comparative analysis. Overall, the thread emphasizes the need for more detailed technical specifications and calculations to assess the proposed engine's viability.