Why Rotary Apex Seals Fail

Rotary engines are extremely interesting, but they're also known for a few persistent issues, including apex seal failure.
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Engine Expert Looks At Porsche's Ridiculously Complicated W-Shaped Engine Patent, Finds Wacky Cylinder Head Design

Last week, the car internet was lit ablaze by a patent from Porsche that depicted a design for a W-shaped, turbocharged, ...