What is frictional power of a steam engine?

Frictional power in a steam engine refers to the energy lost due to friction between moving parts, such as pistons, bearings, and other mechanical components. This friction generates heat and reduces the overall efficiency of the engine, as some of the energy produced by the steam is consumed in overcoming these frictional forces. Minimizing frictional power is essential for improving the performance and efficiency of steam engines. Proper lubrication and precise engineering are key factors in reducing frictional losses.