It is a semi-arbitrary number. You take a baseline prop, run it and call that number 1.0 or 100 or whatever. Then the rest of the props are compared to that baseline by using a number bigger or smaller than 1.0 or 100, depending on if they load the engine more or less than your baseline choice.

And you cannot use one load factor for all of the equations above, it is specific to the equation used.


Mark