page_title: Snowdon Mountain Railway
section_title: Steam locomotives No. 6 to No. 8
hierarchical_section_title: Snowdon Mountain Railway / Rolling stock / List of motive power / Steam locomotives No. 6 to No. 8
caption_attribution_description: Snowdon Mountain Railway. No.6 'Padarn' SLM 0-4-2T 2838 of 1922, at Llanberis Shed, waiting for its first duty of the day. Camera - Fuji FinePix F10 Modified - Trimmed and file size reduced using Finepix Software
context_page_description: The Snowdon Mountain Railway is a narrow gauge rack and pinion mountain railway in Gwynedd, north-west Wales. It is a tourist railway that travels for 4.7 miles from Llanberis to the summit of Snowdon, the highest peak in Wales.
  The SMR is the only public rack and pinion railway in the United Kingdom, and after more than 100 years of operation it remains a popular tourist attraction, carrying more than 140,000 passengers annually. The line is owned and operated by Heritage Great Britain, operators of several other tourist attractions in the United Kingdom.
  The railway is operated in some of the harshest weather conditions in Britain, with services curtailed from reaching the summit in bad weather and remaining closed during the winter from November to mid-March. Single carriage trains are pushed up the mountain by either steam locomotives or diesel locomotives. It has also previously used diesel railcars as multiple units. The railway has two new hybrid locomotives on order, for introduction at the start of the 2020 season.
  The SMR was the inspiration for the fictional Culdee Fell Railway, appearing in the book Mountain Engines, part of The Railway Series written by Reverend W.
context_section_description: The boilers of these engines are fitted with superheaters, making them more efficient, and in place of a lever-type regulator they have a wheel that must be turned ​2 ¹⁄₄ times between closed and fully open. The drive from the cylinders and to the wheels again uses levers, but in a different pattern. The linkage is fitted within double frames at the front of the locomotive. This results in a locomotive that is far more rigid. The side tanks are arranged vertically just in front of the cab. No. 6 carries the same amount of water as the earlier engines, but Nos. 7 and 8 carry enough water to get to the top of the mountain without stopping, if required. There is no separate tank for cooling water as it is drawn from the boiler on these engines.
caption: No. 6 Padarn taking water at Llanberis
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