Editing LMS Coronation Class (section)

==== Overview ====
[[File:Crewe railway station geograph-2413395-by-Ben-Brooksbank.jpg|thumb|The lack of a handrail on the tender shows that this is an ex-streamlined Type A. The locomotive is No. 46225 ''Duchess of Gloucester'' photographed in 1961, so the table below shows that the tender is No. 9799.]]

The original design of tender, which came to be known as Type 'A' was designed for the first ten streamlined locomotives. These were of welded tank construction and included side sheets extending from the rear of the tender, which had the effect of reducing drag from eddies between the tender and the leading coach. 28 of these were constructed to be coupled with all the 24 streamliners (Nos. 6220–6229 and Nos. 6235–6248) as well as four of the unstreamlined locomotives (Nos. 6249–6252).{{r|Jenkinson|loc=Tender Designs and Changes}} In practice, it would seem that the side sheets made it more difficult to access the water filler as well as the couplings.

A second, more traditional design followed for the initial batch of five unstreamlined locomotives (Nos. 6230–6234). Again they were of welded tank construction, but lacked any of the streamlining add-ons. Even without the streamlining Type 'B' tenders were distinguishable from Type 'A' by having a slightly different profile at the front and steps and handrails at the rear.{{r|Jenkinson|loc=Tender Designs and Changes}}

The third design, by George Ivatt, initially was Type 'C1' and it was paired with the three locomotives Nos. 6253–6255. It was partially riveted and resembled a Type 'A' at its front end and a Type 'B' at the rear. The design was quickly followed by Type 'C2', which differed from the 'C1' in that it had a lower front edge and was fitted with Timken roller bearings. Only two 'C2's were built and they were coupled to the last two of the class, Nos. 6256 and 46257.{{r|Jenkinson|loc=Tender Designs and Changes}}

Whilst nearly fifteen of the tenders remained wedded to their original locomotives, others received new partners – the very first tender to be manufactured swapped partners seven times. After the Second World War, when the streamlined tenders were de-streamlined, it was difficult to spot any mismatches. The most readily visible mismatches were those of locomotives Nos. 6249–6252 where pre-produced Type 'A' streamlined tenders were married to unstreamlined locomotives.{{r|Jenkinson|loc=Plate 168}}

An unusual feature of all Coronation Class tenders was that they were fitted with a steam-operated coal pusher to bring the coal down to the firing plate. When this was in operation a plume of steam could be seen rising from the rear face of the coal bunker backwall.{{r|Jenkinson|loc=Plates 122 and 197}} This equipment greatly helped the locomotive's fireman to meet the high demands for power during the non-stop run of {{convert|399|mi|km}} between [[London Euston railway station|London Euston]] and [[Glasgow Central railway station|Glasgow Central]], when operating the ''Coronation Scot'' train.<ref>{{cite journal |title=Tender of L.M.S. "Coronation" class locomotive |journal=The Engineer |date=1939 |volume=168 |page=466}}</ref>