Talk:Tractive effort

message: I am very grateful for this article on tractive effort.....particularly regarging steam locomotives.   My one suggestion for improvement would be to list tractive effort in pounds force in addition to kNs.  Again, though, thank you very much for a very informative article. 128.183.145.64 11:56, 10 May 2007 (UTC)
thread_title: Great article. Add lbf to kN?

message: This article was automatically assessed because at least one WikiProject had rated the article as stub, and the rating on other projects was brought up to Stub class. BetacommandBot 10:04, 10 November 2007 (UTC)
thread_title:  WikiProject class rating

message: This article will have its full potential only with some of the TE represention in force diagrams  —Preceding unsigned comment added by 124.125.34.133 (talk) 22:47, 6 December 2008 (UTC)
replies: text: Do you mean a "tractive effort curve" ? I'll see if I can find one.  —Preceding unsigned comment added by FengRail (talk • contribs) 01:43, 13 February 2009 (UTC)
thread_title: Force diagrams

message: Quote from article: "For a two cylinder locomotive the average force is twice that of a single cylinder locomotive". The usual formula doesn't actually support this. I have always assumed that (going back to the question of speed) the usual formula represented starting tractive effort, so only one of the two cylinders was actually in use at the point of measurement. A single-cylinder railway locomotive is, in any case, a very rare beast. Biscuittin (talk) 09:04, 24 April 2012 (UTC)
replies: text: I have now corrected this. Biscuittin (talk) 18:26, 24 April 2012 (UTC)
thread_title: Number of cylinders

message: For compound locomotives, the usual practice is to calculate the tractive effort developed by the low-pressure cylinders at 80% (instead of 85%) boiler pressure. This is probably based on the Smith 3-cylinder compound system, where the high-pressure piston "floats" at starting and delivers no force. Any attempt to calculate the force delivered by individual cylinders would have to take account of the back-pressure on the high-pressure piston(s). Biscuittin (talk) 11:08, 24 April 2012 (UTC)
thread_title: Compound locomotives

message: I suggest merging this article in to Traction (engineering) , as that title covers this and other topics.
Please see Talk:Traction (engineering)
FengRail (talk) 18:22, 11 April 2009 (UTC)
thread_title: Proposed merge into [[Traction (engineering)]]

message: < Tractive force is required to overcome aerodynamic resistance, which effect is a cube law >
Just plain wrong - in fact the aerodynamic resistance FORCE increases with the square of the speed.
86.181.178.124 (talk) 02:08, 6 October 2011 (UTC)
thread_title:  Aerodynamic drag 

message: Hi all,
This would be my first wiki edit, so bare with me.
Let me first caveat with:  I am not familiar with rail terminology. However, working in the automotive industry, I am pretty sure the terminology used here is incorrect in my line of work. Automotively speaking, tractive effort refers to the force, either required or available, provided by the drivetrain (or, less commonly, brakes) to overcome all resistance factors (rolling resistance, wind resistance, grade, drawbar pull, etc.); tractive force refers to the actual force at the wheel-ground interface that contributes to longitudinal (front/back) motion, and is the difference between TE and rolling resistance; and drawbar pull is the horizontal force exerted by a vehicle on its drawbar coupling for towing or pulling a trailer. In math terms, TE = TF + rolling resistance = DBP + rolling resistance + air resistance + grade + etc (SAE J2188/J2014/J1234). This differs significantly from the first sentence and a half of the wiki article:  "As used in mechanical engineering, the term tractive force is the pulling or pushing force exerted by a vehicle on another vehicle or object. The term tractive effort is synonymous with tractive force."
Since this article is in the train category, there would be two options for amending the issue:  (1) Make a new tractive force/tractive effort wiki article for automobiles and differentiate the two articles as (rail) and (automotive), or (2) Move this article into a general mechanical engineering category (my preferred choice) and separate it into two sections, one for rail and one for automotive. Though honestly, I think the differences may be due more to mistakes or omissions in the current article than to differences in actual terminology (for example, in rail TE and TF would be synonymous, since rolling resistance is probably insignificant as compared to in an automobile).
Thoughts?
--2Tasty (talk) 20:28, 15 October 2013 (UTC)
thread_title:  Automotive vs Rail? 

message: Tractive effort is a short article largely covered here and anything that is not should be merged. Having separate articles serves merely to confuse. Globbet (talk) 21:43, 17 March 2014 (UTC)
replies: text: The process is described at Wikipedia:Merging. Slambo (Speak) 12:29, 26 February 2015 (UTC)
thread_title:  Merge Tractive effort 

message: :The following is a closed discussion of a requested move. Please do not modify it. Subsequent comments should be made in a new section on the talk page. Editors desiring to contest the closing decision should consider a move review after discussing it on the closer's talk page. No further edits should be made to this discussion.
The result of the move request was: Moved to Tractive effort. Tractive force changed to redirect to Traction force. (closed by non-admin page mover) Bensci54 (talk) 17:09, 30 November 2023 (UTC)
replies: text: Tractive force →  – "Tractive force" is ambiguous as it may also refer to the general mechanical concept of traction force. The lead of tractive force already clearly idenfies its scope as applied to vehicles, hence the proposed title. fgnievinski (talk) 02:57, 1 November 2023 (UTC)

text: Note: WikiProject Trains has been notified of this discussion. Polyamorph (talk) 18:40, 15 November 2023 (UTC)

text: Note: WikiProject Physics has been notified of this discussion. Polyamorph (talk) 18:43, 15 November 2023 (UTC)

text: Note: WikiProject Engineering has been notified of this discussion. Polyamorph (talk) 18:43, 15 November 2023 (UTC)
thread_title:  Requested move 1 November 2023