LNER Class A3 4472 Flying Scotsman, a 4-6-2 Pacific steam locomotive to a design of Nigel Gresley, was constructed in 1923 at Doncaster Works for the London and North Eastern Railway(LNER). It was employed on long-distance express East Coast Main Line trains by the LNER and its successors, British Railways Eastern and North-Eastern Regions, notably on the London to Edinburgh Flying Scotsman train service after which it was named. On 30 November 1934, the locomotive became the first steam locomotive to be officially recognized as achieving 100 miles per hour (161 km/h). On 8 August 1989, the locomotive set a record for the longest non-stop run by a steam locomotive traveling 422 miles (679 km).

The LEGO Trains Book. Authored by Holger Matthes. Published by No Starch Press, 2017. ISBN 978-1-59327-819-9. Lego 12v Trains (1983) (Mail Robbery) Commercial (YouTube). Lego12vFan. July 29, 2014. Archived from the original on 2021-12-21 . Retrieved January 12, 2018. Here comes the Emerald Night! Build this incredible classic-styled train with loads of amazing details, from the steam locomotive with furnace to the opening tender and dining car with removable roof, opening doors and detailed interior. Measures 27.2" (68cm) long! Includes three minifigures, elements in rare colors and all-new large train wheels with piston motion! Add LEGO® Power Functions to motorize. The design of Lego trains has developed substantially, with several different systems introduced, with varying degrees of cross-compatibility.

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The 12-volt line was promoted in a 1983 UK television advert featuring a group of adults planning a 'mail train robbery'. [2]

This is the first official steam locomotive to have coupling rods on the wheels since the 12v era of the Trains theme. This is also the first train to have the new "large train wheels", four of them moulded with a flange and two of them moulded blind. The flanged wheels include a rubber band for traction when the Power Functions motor is installed. The blind wheels are made so the train can navigate standard LEGO curves. K10194 Emerald Night Collection was introduced in LEGO shop@home online to include the 10194 train set with a full set of accessories to motorize the train. Richard Stollery (1 October 2007). "Lego 9V Train Communication". Lego Group . Retrieved 13 January 2009.Lego Specifications". Orionrobots.co.uk. 26 February 2011. Archived from the original on 23 August 2011 . Retrieved 30 August 2022. One section of a massive Lego train layout at the National Train Show in Cincinnati, Ohio, July 9, 2005

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. This classically-styled train features a steam locomotive with furnace, opening tender, dining car with removable roof, opening doors and detailed interior! Find sources: "Lego Trains"– news · newspapers · books · scholar · JSTOR ( September 2014) ( Learn how and when to remove this template message)The 37.5mm length is not derived by a certain scale ratio. While HO scale is a 1:87 scale (3.5mm to 1foot), resulting in a 16.5mm ( 0.65in) gauge from real life prototype 1,435mm ( 4ft 8 + 1⁄ 2in) standard gauge. Conversely, modeling standard gauge into Lego trains would require a scaling of (37.5:1435=) circa 1:38. With this scale, a minifigure (height 4 centimetres (1.6in)) in real life size would be 1.52 metres (5ft 0in). Lego Train Adventure Rhyming StoryBook: Riding a Lego Train. Authored by Kyle K. Published by Createspace Independent Publishing Platform, 2016. ISBN 1-53319-444-0 Lots of authentic touches including elements in rare colors and all-new large train wheels with piston motion!

Following the Emerald Night, the new 88002 Power Functions-compatible train motor and controller were introduced in two 2010 sets, the 7938 Passenger Train and 7939 Cargo Train. This new motor utilized the universal Power Functions connections, used by all components. The standardization of the Power Functions system meant that any of the motors in the Power Functions line could be used and builders were not limited to using a single type of motor as they had been with previous Lego train systems.

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In 2018, Lego introduced a new Power Functions system, known as Powered Up, or Power Functions 2.0. This system was brought to replace the old Power Functions brought about in 2007. This system was introduced with the Passenger Train (set number: 60197) and the Cargo Train (set number: 60198). In 2019, the Disney Train was released, with the motorised elements in the tender. In 2020, the Lego Crocodile Locomotive was released, designed to be motorised with Powered Up Large Motor, not the usual train motor. In June 2022 LEGO introduced the Express Passenger Train (set number: 60337) and Cargo Train (set number: 60336), also powered by Powered Up, which features the ability of the train to be controlled via Bluetooth and a smartphone app. LEGO Train Projects. Authored by Charles Pritchett. Published by No Starch Press, 2020. ISBN 978-1-71850-048-8.