LNER Class UA1

The LNER Class UA1 was a proposed 2-6-4-4 Mallet locomotive that was designed by Sir Nigel Gresley.
==Ideas for the design==
The LNER Class UA1 would have featured some unique features that would have never been attempted by the UK before (other than the Garratt type). Those features would have been an articulated frame that can pivot on a hinge, four compound cylinders for the locomotive and having a unique wheel arrangement being a 2-6-4-4. 
It was supposed to be built by the LNER's own Doncaster Works, and would have been the LNER's only Mallet locomotive, the LNER's only 2-6-4-4 locomotive ever, the UK's only only 2-6-4-4 locomotive ever as well as the only 2-6-4-4 locomotive ever to be proposed in the world.
==Why wasn't it built?==
The reasons to why the LNER Class UA1 wasn't built and why the 2-6-4-4 wheel arrangement never came to fruition was that steam technology was considered as old-school, Diesels were rapidly taking over steam locomotives in the UK in the 1950s and 1960s, the idea/notion of investing another steam locomotive wasn't really a good idea.
== Gallery ==
File:2-6-4-4.png
==External links==
*The LNER Encyclopedia: https://www.lner.info/forums/viewtopic.php?t=10993
Category:Never-Built Steam Locomotives
Category:Locomotives
Category:Steam locomotives
Category:Unbuilt locomotives
Category:Tender locomotives
Category:Gresley Locomotives
Category:United Kingdom
Category:Mallet locomotives
Category:Gresley Designs
Category:Articulated locomotives