Talk:GSR Class 800

Ireland Low‑importance

	Ireland portal This article is within the scope of WikiProject Ireland, a collaborative effort to improve the coverage of Ireland on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.IrelandWikipedia:WikiProject IrelandTemplate:WikiProject IrelandIreland articles
Low	This article has been rated as Low-importance on the project's importance scale.

Trains: Locomotives Low‑importance

Trains Portal

This article is within the scope of WikiProject Trains, an attempt to build a comprehensive and detailed guide to rail transport on Wikipedia. If you would like to participate, you can visit the project page, where you can join the project and/or contribute to the discussion. See also: WikiProject Trains to do list and the Trains Portal.TrainsWikipedia:WikiProject TrainsTemplate:WikiProject Trainsrail transport articles

Low

This article has been rated as Low-importance on the project's importance scale.

Associated projects or task forces:
/
	This article is supported by the Locomotives task force.

This article lacks sufficient references and/or adequate inline citations.

Maedhbh or Macha?[edit]

Anybody heard the story that it's actually the Macha preserved in Cultra? According to legend, Macha was in better condition than Maedhbh at the end, so was sent for preservation instead, carrying Maedhbh's nameplates. Talk about 9/11 conspiracy theories. Suckindiesel (talk) 20:58, 29 April 2009 (UTC)[reply]

Didn't hear that. My Grandfather worked in the Inchicore works and worked on the maintenance and manufacturing of all 3 engines. Shortly before he died in 1969, he went up to the Ulster Museum to see the Maedhbh. I'm sure he would have noticed if it wasn't what it's supposed to be. —Preceding unsigned comment added by 89.124.242.112 (talk) 19:44, 29 October 2009 (UTC)[reply]

Full potential of Irish Gauge[edit]

What about the full potential of locomotives on other railways using the Irish Gauge?

Tabletop (talk) 05:24, 30 October 2009 (UTC)[reply]

That's a good point. I'd suggest the Victorian Railways H class would be a better example of a locomotive exploiting the extra width afforded by 5'3" gauge, but are we confusing rail gauge with loading gauge? Any inside cylindered broad gauge steam locomotive with reasonably large diameter cylinders could arguably be said to have exploited the benefits of the extra six and a half inches of Irish gauge over standard gauge.

Maybe the editor was suggesting that this class was the first in Ireland that had the potential to realise some of the benefits of a broader gauge (such as stability at speed, etc). Zzrbiker (talk) 13:38, 29 November 2009 (UTC)[reply]

Power section[edit]

I'm not sure the "Power" section which was added in this edit really adds much to the article. Apart from the fact that formulae for determining the power of steam locomotives are going to apply to all steam locomotives and not just this class (so why would such a discussion appear in this article only), it appears to be original research (see WP:NOR). Zzrbiker (talk) 13:19, 29 November 2009 (UTC)[reply]

Yes, it's not specific to this loco, should be removed & possibly incorporated in Tractive force. An interesting discussion of the topic, all the same. Suckindiesel (talk) 18:01, 29 November 2009 (UTC)[reply]

Moved from main article[edit]

Tractive effort (TE) is the name for the force applied to the rail by the wheel of the train to cause movement. Thus Maeve's force of 34,799 pounds-force equates to 154.8 kN. TE is not constant throughout the speed range but reduces as the engine speeds up.

The TE is constant typically from stall speed up to 20 mph (29.3 ft/s or 8.9 m/s) and during this time acceleration is constant. This is the region of maximum tractive effort and is indicative of the maximum output capability of the engine.

Power is measured as force times speed; hence the maximum power capable can be calculated from the maximum speed attained at the maximum tractive effort.

Force (154.8 kN) × speed (8.9 m/s) = 1380 kW

Force (34,799 lbf) × speed (29.3 ft/s) = 1,019,611 ft·lbf/s. Since a horsepower is 550 ft·lbf/s, dividing by that gives 1854 hp

Thus 1,854 hp (1,383 kW) is the theoretical maximum power at rail.

Note that the actual power to the rail will be reduced due to friction, air resistance (drag), and power dissipated in sound, heat etc. In effect, Maedhbh probably had similar tractive effort to a GM refitted A Class.

External links modified[edit]

Hello fellow Wikipedians,

I have just added archive links to one external link on GSR Class 800. Please take a moment to review my edit. If necessary, add {{cbignore}} after the link to keep me from modifying it. Alternatively, you can add {{nobots|deny=InternetArchiveBot}} to keep me off the page altogether. I made the following changes:

Added archive http://web.archive.org/web/20151222091855/http://andrewsheritagetransport.fotopic.net/p59285851.html to http://andrewsheritagetransport.fotopic.net/p59285851.html

When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at {{Sourcecheck}}).

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 18 January 2022).

If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—^{cyberbot II}_{Talk to my owner:Online} 21:19, 29 February 2016 (UTC)[reply]