''Polar Bear'' is a
narrow-gauge
A narrow-gauge railway (narrow-gauge railroad in the US) is a railway with a track gauge narrower than standard . Most narrow-gauge railways are between and .
Since narrow-gauge railways are usually built with tighter curves, smaller structur ...
steam locomotive
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, oil or, rarely, wood) to heat water in the locomot ...
built in 1905 by
W. G. Bagnall
W. G. Bagnall was a locomotive manufacturer from Stafford, England which was founded in 1875 and operated
until it was taken over in 1962 by English Electric.
History
The company was founded in 1875 by William Gordon Bagnall. The majority ...
for the
Groudle Glen Railway
The Groudle Glen Railway ( Manx: ''Raad Yiarn Glion Ghroudal'') is a narrow gauge railway near Onchan in the Isle of Man, on the boundary of Onchan and Lonan, which is owned and operated by a small group of enthusiastic volunteers and oper ...
. It is now preserved and runs on the
Amberley Museum Railway
The Amberley Museum Railway is a narrow gauge railway based at Amberley Museum, Amberley, West Sussex. It has a varied collection of engines and rolling stock ranging from gauge to gauge. It operates passenger trains at the museum using a m ...
.
Groudle Glen Railway
The Groudle Glen Railway on the
Isle of Man
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, image = Isle of Man by Sentinel-2.jpg
, image_map = Europe-Isle_of_Man.svg
, mapsize =
, map_alt = Location of the Isle of Man in Europe
, map_caption = Location of the Isle of Man (green)
in Europe ...
is a gauge tourist railway opened in 1896. It was originally worked by a single locomotive supplied by W.G. Bagnall, called ''
Sea Lion
Sea lions are pinnipeds characterized by external ear flaps, long foreflippers, the ability to walk on all fours, short and thick hair, and a big chest and belly. Together with the fur seals, they make up the family Otariidae, eared seals. ...
''. The railway proved popular, and in 1905 a second, slightly larger version of the same design was ordered from Bagnall. This locomotive was named ''Polar Bear''.
From 1905 onwards, Sea Lion and Polar Bear worked all the trains on the railway.
The railway was closed between 1915 and 1918. The two Bagnalls were taken out of service in the 1920s, when they were replaced by a pair of
battery locomotives. The electric locomotives quickly wore out, and ''Polar Bear'' and ''Sea Lion'' were returned to traffic.
[ The railway was closed for the duration of ]World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
and, when the line reopened in the late 1940s, only ''Polar Bear'' was returned to traffic. The Groudle Glen Railway closed in 1962.
Preservation
''Polar Bear'' was sold to the Brockham Museum Trust in 1967. In 1982 it passed, with the rest of the Brockham collection, to the Amberley Museum Railway
The Amberley Museum Railway is a narrow gauge railway based at Amberley Museum, Amberley, West Sussex. It has a varied collection of engines and rolling stock ranging from gauge to gauge. It operates passenger trains at the museum using a m ...
, where it was returned to traffic in 1983.[ ''Polar Bears boiler was condemned around 1988, returning to service with a new boiler in 1993. Its boiler certificate expired at the end of 2010;][ with a retube and work on the firebox being required before a return to service. Since being based at Amberley, ''Polar Bear'' has returned to the Groudle Glen on three occasions (1993, 1996 and 2005) to visit.
''Polar Bear'' was stripped down for overhaul in early 2011. The boiler was moved to Chatham for overhaul, with mechanical work being undertaken in-house at Amberley. The boiler was returned to Amberley in January 2012. ''Polar Bear'' was relaunched on 13 July 2013 by BBC newsreader and railway enthusiast Nicholas Owen.]
Polar Bear made its fourth visit to the Groudle Glen Railway since it was preserved in late July 2016. After its two week stay there, it returned home to Amberley museum.
''Brown Bear''
In January 2013 the Groudle Glen Railway announced a plan to construct a new locomotive to be named ''Brown Bear''. ''Brown Bear'' will be built using the original Bagnall drawings for ''Polar Bear'' (Works No. 1781 of 1905) which have largely survived. Once the locomotive is complete it will operate alongside its older sister ''Sea Lion'', allowing the railway to accurately represent period from 1905 through until the outbreak of the Second World War when these diminutive locomotives would have been in service together daily during the busy summer months.
''Polar Bear'' was an updated and more powerful version of ''Sea Lion'' incorporating a number of modifications. Some of these, such as the change from Baguley's modified valve gear to Bagnall Price gear, can be put down to changes in key personnel at W. G. Bagnall's; others, such as the larger diameter cylinders, increased grate area and increased driving wheel diameter were probably specified in light of nine years experience with ''Sea Lion'' in service. The most obvious visible difference between the two locomotives of course is the change from round to rectangular spectacle plates in the front cab sheet which improved the forward vision for the driver.
As ''Polar Bear'' was the last locomotive ordered by the original railway company and is arguably a more advanced design, ''Brown Bear'' will be built as close to ''Polar Bears design as modern manufacturing techniques will allow. The original locomotives made extensive use of cast components, and while the new build will use castings where patterns are already available, some one-off components will be fabricated.
Working on the assumption that major components will be manufactured off site by a series of specialist firms before coming together for final assembly at Groudle the total cost of the build is expected to be in the region of £50,000.00 with completion expected within five years.
References
{{reflist
Groudle Glen Railway
Preserved narrow gauge steam locomotives of Great Britain
2 ft gauge locomotives
Individual locomotives of Great Britain