Talk:British Rail Class 172

Question
According to the barking - Gospel Oak Line User Group they have been told that a 2 car version of this class will be used on the GOBLIN 62.49.61.203 21:12, 10 July 2007 (UTC)
 * Sorry forgot to log in Wilmot1 21:13, 10 July 2007 (UTC)

Speed
Can we have a reference for the speed? - I can't find one but I head that it's 75mph and not 100. 82.36.81.159 19:40, 23 July 2007 (UTC)
 * Presumably htey will be the same as the normal 170's (ie 100mph), otherwise i could mean they will have diffrent gearing ??? Pickle 17:12, 30 July 2007 (UTC)

8 or 9?
Do we know the reason for the 9th London Overground unit? Are they giving the GOBLIN an extra unit or do they have some other use planned for it? At the moment the article seems to contradict itself. --DanielRigal (talk) 17:00, 16 January 2008 (UTC)


 * There is only going to be 8 London Overground units according to Bombardier. Unisouth (talk) 10:11, 23 January 2008 (UTC)

Mechanical transmission?
Talk on uk.railway that this should in fact be "hydro-mechanical" a la Voith. Can someone check this and provide a reference? 86.132.142.153 (talk) 19:34, 6 March 2009 (UTC)
 * I have no idea.
 * However I have removed it (for now)


 * "The Class 172s will have mechanical transmission rather than the hydraulic transmission that is fitted to the Class 168, 170 & 171."


 * I don't think it's my responsibility to find out who added it and ask them were they got the info from.
 * Certainly I would like to know either way.213.249.232.187 (talk) 16:43, 7 March 2009 (UTC)
 * "The sets (Class 172/0) are the latest development of the Turbostar family and incorporate a diesel-mechanical transmission" according to Ian Allan Rail Guide 2011, page 83. I don't know whether the transmission is fully automatic or semi-automatic but, either way, I expect there would be an improvement in fuel consumption compared to a diesel-hydraulic. Biscuittin (talk) 18:21, 5 April 2011 (UTC)
 * ZF brochure (pdf) can be downloaded here and transmission details are on page 4. There seem to be three types - ZF Ecomat (6 speeds + torque converter), ZF AS (12 speeds + dry clutch), ZF EcoLife (6 speeds + torque converter). The Class 172 apparently has the ZF Ecomat (with torque converter) so I think the transmission should be described as hydro-mechanical rather than just mechanical. Biscuittin (talk) 09:28, 6 April 2011 (UTC)
 * On the Class 170/171 the torque converter will be in use during the entire acceleration period, until lockup into direct drive occurs at cruising speed. I suspect that, on the Class 172, the torque converter will only be in use briefly during gear-changing, so I would expect a significant improvement in fuel economy. Biscuittin (talk) 09:45, 6 April 2011 (UTC)

Differences
It would be useful to have a section explaining the difference between a 172 and a 170 or 171. -mattbuck (Talk) 18:49, 13 October 2009 (UTC)

172/1s and tripcock
The article says that Chiltern Railways will have 172/1s and later that CR's trains will not have the tripcock. The RH panel says 172/1s will have tripcock. —Preceding unsigned comment added by 82.7.49.185 (talk) 21:36, 6 January 2010 (UTC)

Possible change to the title of this article
This article is currently named in accordance the WikiProject UK Railways naming conventions for British rolling stock allocated a TOPS number. A proposal to change this convention and/or its scope is being discussed at Wikipedia talk:WikiProject UK Railways, where your comments would be welcome.

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External links modified
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Orphaned references in British Rail Class 172
I check pages listed in Category:Pages with incorrect ref formatting to try to fix reference errors. One of the things I do is look for content for orphaned references in wikilinked articles. I have found content for some of British Rail Class 172's orphans, the problem is that I found more than one version. I can't determine which (if any) is correct for this article, so I am asking for a sentient editor to look it over and copy the correct ref content into this article.

Reference named "TRC1": From British Rail Class 120:  From British Rail Class 151:  From British Rail Class 129:  From British Rail Class 128:  From British Rail Class 143:  From British Rail Class 155: </li> <li>From British Rail Class 122: </li> <li>From British Rail Class 124: </li> <li>From British Rail Class 141: </li> <li>From British Rail Class 144: </li> <li>From British Rail Class 142: </li> <li>From British Rail Class 156: </li> <li>From British Rail Class 158: </li> <li>From British Rail Class 150: </li> <li>From British Rail Class 153: </li> <li>From British Rail Class 508: </li> </ul>

I apologize if any of the above are effectively identical; I am just a simple computer program, so I can't determine whether minor differences are significant or not. AnomieBOT ⚡ 07:10, 16 January 2020 (UTC)