Union Pacific Steam Engine # 9000 - Only one type of this 4-12-2 steam engine was built: the Union Pacific Railroad's 9000-series or class of locomotives. ALCO had obtained permission to use the conjugated valve gear invented by Sir Nigel Gresley. This system used two hinged levers connected to the outer cylinder's valves to operate the inner cylinder's valve. The 9000 class locomotives were the largest to use the Gresley gear feature.

Union Pacific Steam Engine # 9000 - Only one type of this 4-12-2 steam engine was built: the Union Pacific Railroad's 9000-series or class of locomotives. ALCO had obtained permission to use the conjugated valve gear invented by Sir Nigel Gresley. This system used two hinged levers connected to the outer cylinder's valves to operate the inner cylinder's valve. The 9000 class locomotives were the largest to use the Gresley gear feature.

Cock o’ the North is seen at Dundee shed – Gresley Society Collection

Cock o’ the North is seen at Dundee shed – Gresley Society Collection

Old England Gresley Pottery Set of Two Small Creamer

Old England Gresley Pottery Set of Two Small Creamer 1930's T. H. Green and Co, LTD Vintage Kitchen Decor Collectible Pottery Gift for Her

Old England Gresley Pottery Set of Two Small Creamer

LNER A4 pacific locomotive 4498/60007 "Sir Nigel Gresley" in later British Railways livery and BR number.

LNER A4 pacific locomotive 4498/60007 "Sir Nigel Gresley" in later British Railways livery and BR number.

Personalized fire pits for Nick and Ches, image taken by Andy Le Gresley

Personalized fire pits for Nick and Ches, image taken by Andy Le Gresley

Sir Nigel Gresley on Flying Scotsman 1 may 1928

Sir Nigel Gresley on Flying Scotsman 1 may 1928

Speed record holder 'Mallard' at York. www.haveit.cz

Behold the Rusting Beauty of Abandoned Train Graveyards

http://www.flickr.com/photos/graham_williams/6353017351/sizes/l/in/pool-uksteamengines/

http://www.flickr.com/photos/graham_williams/6353017351/sizes/l/in/pool-uksteamengines/

The driving elements of the Gresley 4-6-2 Pacific steam locomotive Stock Photo, Royalty Free Image: 102227033 - Alamy

The driving elements of the Gresley 4-6-2 Pacific steam locomotive Stock Photo, Royalty Free Image: 102227033 - Alamy

Gresley V2s Dvd: Tribute to Green Arrow

Gresley V2s Dvd: Tribute to Green Arrow

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