Rotax certified engines use a "slipper clutch" system to help protect the
crankshaft and gear box. It isn't a shear pin system, but rather a spring
loaded ramp-toothed afair that resets. Rotax has criteria for strikes that
still require teardown of the gearbox and/or the entire engine.

tom


I'm wondering if there would be any benefit to using shear
pins in these systems.
Rich Lemert