Clinic
You CAN do it...
Mathematics of Torque and Horsepower |
Written by Craig Fry and Paul Grosse | ||||||||||||||||
Saturday, 10 July 2004 | ||||||||||||||||
The hypothetical engine to be considered below produces 300 foot pounds of torque at 5,000 rpm. In order to find this engine's horsepower one would use the above equations as such: There is 3.28 feet in a meter, and 4.448 Newtons in a pound, which will be needed since the experimental engine's torque is rated in foot pounds force. The frequency of the engine is calculated by: f = (5000 revolutions per minute) / (60 seconds) f = 83.33 revolutions per sec. Implementing the engine's frequency into the equation of angular velocity w = 2 * p * f w = 2 * p * (83.33 revolutions per sec.) w = 523.6 radians per second In order to convert foot pounds of torque to Newton meters of force one uses this equation. T = 300 foot pounds of torque T = (300 foot * pounds) * (4.448 Newton/pound) * (1 meter/ 3.28 feet) T = 406.83 Newton meters Then the power is found by multiplying the angular velocity times torque P = T * w P = T * (523.6 radians per sec.) P = (406.83 Newton meters) x (523.6 radians per sec.) P = 213,015.69 watts Watts is then converted into the American standard for power called horsepower by dividing watts by 745.7. 213,015.69 watts/ 745.7 watts = 285.66 horsepower Beer, Ferdinand P., Johnston, E. Russell Jr. Mechanics of Materials. New York: McGraw-Hill, Inc., 1981.
Questions should be asked in our forum (Use discuss link below). The forum is very active and you stand a good chance of getting your questions answered there. If you would like to leave feedback for the author, or have additional information you think will benefit others, please use the comment section at the bottom of this page. Discuss this article on the forums. (0 posts) DISCLAIMER: This information and procedure is provided as a courtesy and is for informational purposes only. Neither the publishers nor the authors accept any responsibility for the accuracy, applicability, or suitability of this procedure. You assume all risks associated with the use of this information. NEITHER THE PUBLISHERs NOR THE AUTHORs SHALL IN ANY EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, PUNITIVE, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, OF ANY NATURE ARISING OUT OF OR IN ANY WAY CONNECTED WITH THE USE OR MISUSE OF THIS INFORMATION OR LACK OF INFORMATION. Any type of modification or service work on your motorcycle should always be performed by a professional mechanic. If performed incorrectly, this procedure may endanger the safety of you and others on your motorcycle and possibly invalidate your manufacturer’s warranty. Quote this article on your site | Views: 36889
Only registered users can write comments. Powered by AkoComment Tweaked Special Edition v.1.4.6 |
RSC Login |
---|
The Road Star Clinic is a collaborative community of riders who archive and publish user contributed technical data about Yamaha Road Star motorcycles.
We also sponsor the creation and support of other community websites similar to our own. Inquiries about availability of a website for your community can be submitted to us via any "Contact Us" option on the Clinic.