Did I read where the TCM O-200D is a new designation? Wonder what the difference is?
A few differences, all designed to save weight to better compete with the Rotax. Lightweight starter, generator, etc. But the most visible difference is the lack of fins on the cylinder barrels. The cylinder
heads still have fins, but the barrels are smooth. Continental found that the fins simply weren't needed for cooling. Last I read there was some question as to whether or not the fins provided any structural rigidity, but that was 6+ months ago so that question appears to have been answered.
The oil sump is a boxy cast piece, not the football-shaped sump on our O-200s.
The engine is still slightly heavier than a Rotax, but the higher TBO and the well-established maintenance and parts chain means a ready acceptance by the marketplace. Plus, the simpler design (no water cooling or reduction drive) makes for easier service. I think Cessna saved all their daring for the design of the plane, and then (rightfully so) got conservative with their construction materials and powerplant. The result is an aircraft that will fit right in at any airport with any A&P.
