Greetings colleagues. Looking at the different engines I see that they have different HP horsepower, depending on the application. Now I have a concern and it is: What is the manufacturer based on to determine the number of HP you will need? What parameters should I consider to know how many HP is the engine that I will need? that is, for example: I have a conveyor belt in which a load weighing 100kg goes. How do I know which engine can move this load? And what parameters should I take into account to make this calculation? the same question arises in the so-called "Malacates" cargo lifts. Or also for building elevators. I would like to know what parameters I have to take into account to know the HP and the power consumption. And if these paramparam apply for different applications that is: and if I want a centrifugal pump the cylinder head sucks me a flow of 100L / s. The example of the 100kg load is purely didactic. In Colombia, Malacate is told to elevators that serve to raise and lower loads in industries.