> but like the Wankel rotary engine no-one is willing to bear the cost of redoing the last 70 years of engineering optimisations Mazda tried bringing this back

> but like the Wankel rotary engine no-one is willing to bear the cost of redoing the last 70 years of engineering optimisations Mazda tried bringing this back with the RX-8. It was a failure, and while everybody loves the "spirit" of the wankel, outside of the infamous 787B I think people are always going to remember it for the theory instead of the application. If we're going to talk about using modern engineering capabilities, perhaps we should be discussing the quasiturbine engine? At least in theory it solves many of the problems of the rotary engine, although I suspect it will be a nightmare of complexity that never becomes reliable. https://en.wikipedia.org/wiki/Quasiturbine https://en.wikipedia.org/wiki/Quasiturbine