A Wankel has some inherent problems which are unsolvable. The seals between the "lobes" and wall for example. If they develop a new material, one that lasts, if it is applied to a normal Otto or Dieser engine, that will make those even better...
The service interval is way too short, and no "normal" mechanics can service and repair them.
I think that (sadly) this direction will kill off Bristol.
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