Definitions of Term
Units called "horsepower" have differing definitions:
- The mechanical horsepower, also known as imperial horsepower, of exactly 550 foot-pounds per second is approximately equivalent to 745.7 watts.
- The metric horsepower of 75 kgf-m per second is approximately equivalent to 735.499 watts.
- The Pferdestärke PS (German translation of horsepower) is a name for a group of similar power measurements used in Germany around the end of the 19th century, all of about one metric horsepower in size.
- The boiler horsepower is used for rating steam boilers and is equivalent to 34.5 pounds of water evaporated per hour at 212 degrees Fahrenheit, or 9,809.5 watts.
- One horsepower for rating electric motors is equal to 746 watts.
- Continental European electric motors used to have dual ratings, using a conversion rate of 0.735 kW for 1 hp
- British Royal Automobile Club (RAC) horsepower is one of the tax horsepower systems adopted around Europe which make an estimate based on several engine dimensions.
Read more about this topic: Horsepower
Famous quotes containing the words definitions of, definitions and/or term:
“What I do not like about our definitions of genius is that there is in them nothing of the day of judgment, nothing of resounding through eternity and nothing of the footsteps of the Almighty.”
—G.C. (Georg Christoph)
“The loosening, for some people, of rigid role definitions for men and women has shown that dads can be great at calming babies—if they take the time and make the effort to learn how. It’s that time and effort that not only teaches the dad how to calm the babies, but also turns him into a parent, just as the time and effort the mother puts into the babies turns her into a parent.”
—Pamela Patrick Novotny (20th century)
“No—is a term very frequently employed by the fair, when they mean everything else but a negative. Their yes is always yes; but their no is not always no.”
—Anonymous, U.S. women’s magazine contributor. M, Weekly Visitor or Ladies Miscellany, p. 203 (April 1803)