Talk:Washington Metro rolling stock

This article is of interest to the following WikiProjects:

Template:WikiProject DC Please add the quality rating to the {{WikiProject banner shell}} template instead of this project banner. See WP:PIQA for details. Trains: Washington Metro B‑class 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 B This article has been rated as B-class on Wikipedia's content assessment scale. ??? This article has not yet received a rating on the project's importance scale. Associated projects or task forces: /  This article is supported by WikiProject Washington Metro. United States: Washington Metro Unassessed Low‑importance This article is within the scope of WikiProject United States, a collaborative effort to improve the coverage of topics relating to the United States of America on Wikipedia. If you would like to participate, please visit the project page, where you can join the ongoing discussions. Template Usage Articles Requested! Become a Member Project Talk Alerts United StatesWikipedia:WikiProject United StatesTemplate:WikiProject United StatesUnited States articles ??? This article has not yet received a rating on Wikipedia's content assessment scale. Low This article has been rated as Low-importance on the project's importance scale. This article is supported by WikiProject District of Columbia - Washington Metro.

For the Rohrs, and the 2000 and 3000 Bredas, we need to separate out the facts/figures for these cars as originally delivered, vs. how they exist rehabilitated. I'll play with it some more when I get home, but I just thought I'd throw that one out there. I plan on doing some more reworking on the article when I get home as well. SchuminWeb (Talk) 00:02, 9 April 2006 (UTC)[reply]

I rearranged the article a little bit - what do you think? SchuminWeb (Talk) 09:16, 9 April 2006 (UTC)[reply]

I think it would be great to add some detail on what makes the particular braking sounds. It seems to be a hot topic on YouTube to speculate what makes the noise: http://www.youtube.com/watch?v=is5vzJPBksQ ("electrical reversal in which the motors are braking speed to stop the train"), http://www.youtube.com/watch?v=G6dc5JdMgd0 ("the sounds come from devices called GTO thyristors, which feed pulses (the gear changing sounds) of current to the traction motors") Bajenkins (talk) 04:00, 13 January 2008 (UTC)[reply]

Well, the 3000 and 4000-Series Bredas get their distinctive buzz from an electronic "chopper", but as for the others, I couldn't tell you right offhand. Either way, though, I would think that descriptions of these sounds would be better placed in a different article than this one, perhaps one on AC motors? SchuminWeb (Talk) 05:37, 13 January 2008 (UTC)[reply]

Some people think the motors are essentially being put into reverse to stop the train, some think they are being used in regenerative braking, and some think it's just normal motor noise. I don't see the harm in adding two or three sentences to the effect of 1) the buzzing is made by chopper-controlled DC motors in the unrehabbed 3k/4k series, and the whirring/whistling is caused by xxx in the AC motors. and 2) it's motor-reversal/regenerative/whatever braking. Moreover, I think it would be better to put the information in this article than as an aside in a AC/DC motor article. Bajenkins (talk) 22:02, 13 January 2008 (UTC)[reply]