How many times is the efficiency of excavator equivalent to manpower?

The engine of excavator is diesel engine, and the efficiency of diesel engine is higher than that of gasoline engine, and the efficiency is about 40%~60%.

Excavators, also known as digging machines, are earth-moving machines that use buckets to dig materials above or below the bearing surface, load them into transport vehicles or unload them into the yard. The materials excavated by excavators are mainly soil, coal, sediments and pre-loosened soil and rocks. Judging from the development of construction machinery in recent years, excavators have developed relatively rapidly, and excavators have become one of the most important construction machinery in engineering construction. The three most important parameters of excavator are working weight (mass), engine power and bucket capacity.