What is the taper on the crankshaft of a rotax engine called?

The taper on the crankshaft of a Rotax engine is commonly referred to as the "crankshaft taper" or "propeller taper." This taper is designed to ensure a secure fit for the propeller hub, allowing for proper alignment and efficient power transfer. It typically follows a specific angle and dimension to accommodate various propeller types and sizes used with the engine.