Talk:Twin unit

Merge Article
I seriously think this 'stub' should be merged with Rapid transit technology or Chicago 'L'. There really isn't much to expand here. Jim Kotwani 23:05, 30 May 2010 (UTC) —Preceding unsigned comment added by Simplyj (talk • contribs)
 * No way. This is by no means restricted to rapid transit trains and even less to the USA or Chicago. If anything (except expanded to reflect that), it should be moved to a more global term such as "Twinset", "Twin set" or "Twin unit". --Keinstein (talk) 20:52, 25 August 2010 (UTC)
 * And, after having a look at the History: why this warring with globalization tags instead of discussing here? Especially removing others' tags without even declaring a reason, and a good one, is quite bad wikiquette. --Keinstein (talk) 21:01, 25 August 2010 (UTC)
 * OK, a partial mistake of me: most of the warring seems to have been about an unreferenced section on US railroading jargon, which also makes up most of the article. Well, that section and the lack of balance it causes does give an impression that the phenomenon is mainly limited to the USA and that there is not much more to say about it. Neither is true. --Keinstein (talk) 21:20, 25 August 2010 (UTC)

Types of married pairs
Married Pairs present a variety of options regarding their couplings and equipment layout. Railfans and industry professionals alike have extended the term along the general theme of marriage.


 * Civil Unions - These units are mechanically single units with a complete set of equipment on each train and standard couplers between every car. While able to operate alone the cars may only have one cab or no cabs at all, requiring to be paired up for normal operation.  All PATH rolling stock is of the civil union variety.


 * Protestant Married Pairs - These units are the most common variety of married pair in that components are shared between cars and the coupler are of a semi-permanently type which cannot be separated in normal operation. However, with some effort the cars can be broken apart and re-paired with other units.


 * Catholic Married Pairs - This consist of articulated units which share wheelsets and thus cannot be separated without a great deal of effort. Most modern trams and light rail vehicles  are of the Catholic variety.


 * Mormon Married Pairs - This is a married pair consisting of more than two units. While similar to a standard railroad trainset, Mormon married pairs are still regularly combined into larger trains.  The New York City Subway is the largest user of the Mormon married pair initially converting their Protestant married pair R44, R46 and R68 units into 4 or 5 car Mormon married pairs.  All new car orders, the R142, R142A, R143, R160A, and R160B car classes, have been of the Mormon variety.

No idea if this is a joke or not. Not encyclopedic.Sf5xeplus (talk) 15:58, 18 October 2010 (UTC)
 * It's not a joke, its the standard way to refer to the flavours of Married Pairs on web forums and within transit consulting circles.Sturmovik (talk) 12:34, 1 February 2011 (UTC)
 * I've reverted it again - forums aren't a good enough source - all sorts of rubbish turns up on there - if this is valid it needs referencing from a reliable source not a forum please.Sf5xeplus (talk) 22:24, 1 February 2011 (UTC)
 * If it's slang then Glossary of North American railroad terminology, but still needs a source, which I couldn't find.Sf5xeplus (talk) 22:48, 1 February 2011 (UTC)