Between 1854 when the Shrewsbury & Chester and Shrewsbury & Birmingham Railways were absorbed by the Great Western Railway, and 1864 when he moved south to Swindon Works

Swindon Works

Swindon railway works were built by the Great Western Railway in 1841 in Swindon in the English county of Wiltshire.-History:In 1835 Parliament approved the construction of a railway between London and Bristol. Its Chief Engineer was Isambard Kingdom Brunel.From 1836, Brunel had been buying...

, Joseph Armstrong

Joseph Armstrong (engineer)

Joseph Armstrong was a British locomotive engineer and the second locomotive superintendent of the Great Western Railway...

 occupied the post of the GWR's Locomotive Superintendent, Northern Division, at Wolverhampton Works

Wolverhampton railway works

Wolverhampton railway works was in the city of Wolverhampton in the county of Staffordshire, England. It was almost due north of the city centre, and is commemorated with a small display of level crossing gates and a plaque...

. For ten years the task of providing new locomotives for the GWR's newly acquired standard gauge lines fell jointly to Armstrong and to his superior Daniel Gooch

Daniel Gooch standard gauge locomotives

The Daniel Gooch standard gauge locomotives comprise several classes of locomotives designed by Daniel Gooch, Superintendent of Locomotive Engines for the Great Western Railway from 1837 to 1864.-History:...

, the railway's principal Locomotive Superintendent who was based at Paddington

Paddington station

Paddington railway station, also known as London Paddington, is a central London railway terminus and London Underground complex.The site is a historic one, having served as the London terminus of the Great Western Railway and its successors since 1838. Much of the current mainline station dates...

.

This article deals with the new locomotives designed by Armstrong during his Wolverhampton years. For his later, Swindon locomotives, see the individual articles as listed in the table of GWR Locomotives at the foot of the article.

The locomotives

At the start of his GWR career (1854-8), Armstrong was concerned principally with keeping the motley collection of S&CR and S&BR locomotives in working order, and with enlarging Wolverhampton (Stafford Road) Works. He eventually began new construction there in 1858/9.

These were the four classes of locomotive newly built at Wolverhampton during the Joseph Armstrong years:

• 7 Class: These were three differing types of 2-2-2 engine (initially of the Jenny Lind
  Jenny Lind locomotive
  The Jenny Lind locomotive was the first of a class of ten steam locomotives built in 1847 for the London Brighton and South Coast Railway by E. B. Wilson and Company of Leeds, named after Jenny Lind who was a famous opera singer of the period...
  
   type), though they are recorded as a single class in the GWR diagrams. Nos. 7 and 8 (6'3" driving wheels) were built in 1859, Nos. 30 (6'6" wheels) in 1860, and the fourth, No. 110 (6'0" wheels), in 1862. These, Armstrong's first new locomotives, already show a strong independence from Gooch's ideas, and reflect Armstrong's work with Thomas Gray at Hull and Brighton. Holcroft discusses a fifth 2-2-2, No.32, but since this was regarded entirely as a renewal of an S&CR locomotive, Tabor does not treat it as part of this series. Nos. 7 and 8 were withdrawn in 1876 and 1883 respectively, but in 1883 and 1887 Nos. 30 and 110 were nominally renewed under George Armstrong
  George Armstrong (engineer)
  George Armstrong was in charge of standard gauge steam locomotives for the Great Western Railway at Stafford Road Works, Wolverhampton from 1864 to 1897...
  
   as 2-4-0s, officially as members of the 111 class (see below).
• 111 Class: Nos. 111-114, originally a series of six 2-4-0s with 6' diameter driving wheels built in 1863/4. The class was enlarged by George Armstrong in 1866-7 by the addition of another dozen, Nos. 1006-1011 and 372-377, and in 1886-7 by another two by "renewing" singles Nos.30 and 110. Finally, after years of building only tank engines, Wolverhampton added another seven entirely new locos to the class, Nos. 3226-3231, bringing the class total to 27. Intended for secondary trains, the original 111s were initially shedded at Chester for trains to Birkenhead, to Manchester, and south to Wolverhampton. Some of the later engines were allocated to Hereford, and the class subsequently worked further south, on the Gloucester and Oxford routes. The older locos were withdrawn between 1903 and 1914, while some of the 3226 series (which worked mainly in the West Midlands) remained in service until 1922.
• 17 Class: Nos. 17, 18, 1002, 1003, 11, 177, 344-346, nine 2-4-0 tank engines built in 1864. Nos. 17 and 18 were numbered 1A and 2A until July 1865; 1002-3, 3A and 4A until Sept. 1866; 227 was 177 until August 1867 and then 238 until July 1870. The class was not uniform but to start with all had back and well tanks, inside frames, and domeless boilers. Soon all were fitted with short saddle tanks instead of the apparently unsatisfactory well tanks. In early days these engines worked from Wellington and Croes Newydd sheds, but later some migrated to south Wales, Swindon, and the London area. They were all withdrawn between 1883 and 1893.
• 302 Class: Nos. 302-309, eight outside-frame 0-6-0 saddle tanks built in 1864-5. These have slotted frames as on the 360 Class
  GWR 360 Class
  The 360 Class was a small series of 0-6-0 freight locomotives designed for the Great Western Railway by Joseph Armstrong and built at Swindon Works in 1866. They were numbered 360-369, 1015 and 1001, and as built had slightly smaller boilers than the similar and much more numerous 388 Class which...
  
   tender engines, to which they roughly correspond. They were the first of the larger type of GWR tank locomotive, and had long lives. No. 302 was still a saddle tank when withdrawn in 1918, but the others became pannier tanks when reboilered with Belpaire firebox
  Belpaire firebox
  The Belpaire firebox is a type of firebox used on steam locomotives. It was invented by Alfred Belpaire of Belgium. It has a greater surface area at the top of the firebox, improving heat transfer and steam production...
  
  es between 1911 and 1923. The last two to be withdrawn were Nos. 303 and 306 in summer 1932, at the age of 68 years.

Since 1864 was the actual year in which Joseph Armstrong transferred to Swindon, and George took over at Wolverhampton, it does not seem possible to attribute the 17 and 302 classes to either of the brothers with absolute certainty. Holcroft discusses the classes in his chapters on both brothers , while Tabor simply indicates that the relevant engines were built at Wolverhampton, without specifying their designer.