|
Tractor Talk Discussion Board |
Re: Prony/pony brakes
[ Expand ] [ View Follow Ups ] [ Post Followup ] [ Return to Forum ]
Posted by Jerry/MT on December 08, 2004 at 21:11:22 from (206.183.120.220):
In Reply to: Prony/pony brakes posted by JT on December 08, 2004 at 07:20:51:
A Prony brak consists of a brake band that clamps on a spinning shaft. Connected to the brake band is a lever arm that reacts against a spring scale or a load cell. The shaft is set spinning and the brake band is clamped down till the shaft just begins to slow down. The force is measured at that point as is the rpm and the horsepower is calculated by : HP = rpm x lever arm length x measured force/5252. Needless to say, the answer you get is not too precise. I don't understand how you can get power and torque information from the Baker Fan without a calibration based on measured dimensions, air density, rpm, Reynolds No., etc. You can ceratinly load a shaft with the device but what's the load? buickanddeere suggests a more precise method for determining power directly and toruqe via : Torque = HP x 5252/rpm. My two cents.
Follow Ups:
Home
| Forums
Today's Featured Article -
Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
... [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]
Copyright © 1997-2025 Yesterday's Tractor Co.
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. Yesterday's Tractors - Antique Tractor HeadquartersWebsite Accessibility Policy |
|
