Nominal-horse-power

Does not represent the real force of an engine. The method of calculating it, was first employed by James Watt, and is still with some modifications in use for expre ing the power of engines in all merchant steamers. One „ Nominal ” horse-power equals about 5 to 6 u Indicated ” horse-power. The modes of computing it are various. The following is a common form for „ Compound-engines; ”