In a radial engine, where is the thrust bearing typically located?

In a radial engine, the thrust bearing is typically located at the rear of the engine. This positioning is important for several reasons. The thrust bearing serves the role of supporting the rearward thrust generated by the propeller during operation. In radial engines, the propeller is mounted on the front, and as it spins, it exerts a significant force in the opposite direction (thrust). By placing the thrust bearing at the rear, it can effectively counteract this force and maintain the engine's structural integrity and alignment.

Moreover, having the thrust bearing at the rear helps to balance the loads throughout the engine, ensuring even distribution and reducing the risk of wear or failure over time. The design of the radial engine, which commonly features multiple cylinders arranged in a circle around a central crankshaft, benefits from this configuration, as it helps to stabilize the engine during operation and allows for efficient operation of all moving parts.

Options that suggest other locations, such as the center of the engine or on the crankcase, would not effectively counteract the thrust produced during operation. Additionally, placing the thrust bearing on the propeller hub would lead to complications in engine mounting and alignment, potentially compromising the overall functionality and safety of the engine.