Posted by Indiana Ken on January 03, 2012 at 17:01:42 from (66.249.233.66):
In Reply to: Drawbar HP posted by bradley martin on January 03, 2012 at 08:58:40:
Quoting Removed, click Modern View to see
By definition: Horse Power is force times distance per unit time, the equation is; 1 HP=33,000Ft-Lb/Min. Typically, the test books will show a horse attached to a rope which goes around a pulley and is then attached to a weight. Since the weight is lifted vertically it is the force used in the equation, the distance must also be measured and the amount of time it took to lift the weight. For drawbar horse power one needs a pull scale to measure the force (pull) and then the speed (distance/unit time) is measured.
For example, if a tractor generates a drawbar pull of 150 Lb and is able to maintain a steady 2.5 MPH, the HP is calculated as follows; Note 2.5 MPH = 220 Ft/Min, therefore we have 150 Lb x 220 Ft/Min = 33,000 Ft-Lb/Min which is equal to 1 HP.
Note - in the above example the tractor may have been pulling a 1000 Lbs of weight to generate the drawbar pull of 150 Lbs - since the weight is pulled horizontally it is the draw pull not the actual weight we use in the calculation.
How does this relate to horses? It has been claimed a horse can walk 2.5 MPH while lifting a 150 Lb weight vertically.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
