For better climb performance in a constant speed propeller system, what should the propeller be set to?

Setting the propeller to fine pitch significantly improves climb performance in a constant speed propeller system. In this configuration, the blades of the propeller are angled to allow for maximum engine power and efficiency at lower airspeeds, which is optimal during climb phases. This adjustment enables the engine to produce more thrust and enhances the aircraft's ability to ascend rapidly by reducing the load on the engine, thus utilizing its power more effectively.

A coarse pitch, in contrast, is better suited for cruising, where higher speeds are desired. It optimizes fuel efficiency and drag but is less effective in generating the necessary thrust required for an efficient climb. High RPM can lead to increased drag and decreased efficiency at climb speeds, while low RPM would not provide the desired thrust necessary for optimal climb performance. Therefore, fine pitch is the ideal setting for achieving better climb rates in a constant speed propeller system.