So, you've owned the Wankel and had problematic maintenance? Or you are guessing? The Wankel is an ICE, it has a fuel system, ignition system, cooling system, and belt drive reduction system as they all do. Maintenance tasks are identical in most respects with any glider ICE. Only if you have to tear the engine down completely will you see the differences (and here the Wankel is somewhat simpler, having 2 moving parts).

On Thursday, September 17, 2020 at 5:51:39 AM UTC-7, John Iacobucci wrote:
One can argue the Wankle is less vibration on the whole, but maintenance for problems would be problematic. Pluses and minuses.