| Queensland Railways PB15 class | |||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 448 at Swanbank | |||||||||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||||||||
The Queensland Railways PB15 class locomotive is an old class of 4-6-0 steam engines operated by the Queensland Railways.
| Queensland Railways PB15 class | |||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 448 at Swanbank | |||||||||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||||||||
The Queensland Railways PB15 class locomotive is an old class of 4-6-0 steam engines operated by the Queensland Railways.
The design resulted from a need for more powerful engines for passenger trains. The PB15 Class engine was designed by Locomotive Engineer, Henry Horniblow and LW Piggott. Per Queensland Railway's classification system they were designated the PB15 class engine, P representing they were a passenger locomotive, the B that they had three driving axles and the 15 the cylinder diameter in inches. The PB15 engines were in essence identical to the B15 class engine. [2] [3] [4] [5]
The first PB15 engines were delivered by Walkers Limited, Maryborough in December 1899. By 1912, a total of 202 engines had been built by Walkers (122), Evans, Anderson, Phelan & Co (70), Kitson & Co (20) and Toowoomba Foundry (20). They were fitted with Stephenson valve gear. In May 1918, engine no. 411 was converted at North Ipswich Railway Workshops into a tank engine, the one off member of the 6D15 class engine. In March 1922 however, due to poor performance it was converted back to its original tender form. [2] [4]
In 1924 one example of the engine was built by North Ipswich Railway Workshops for the Aramac Shire Tramway. It was acquired by Queensland Railways in 1958. [2] [4]
In 1925/26, Walkers manufactured a further 30 improved PB15 Class locomotives. These engines of these wheel arrangement were fitted with larger tenders and Walschaerts valve gear. This earned this variant of the PB15 engines the nickname Walschaerts. [2] [4]
In 1932, a number of PB15 class locomotives attached to Ipswich depot were fitted with a second sandbox for rear sanding to assist with shunting work on the colliery branches. These types of engines were nos. 351, 508, 567, 574, 587, 591, and 750, the last mentioned being a Walschaert engines or 1924 type PB15 engine. Later, the rear sanding equipment attached to classmate engine No. 591 was removed and PB15 engine No. 525 was fitted in lieu.
Five examples of these engines have been preserved:
The Walschaerts valve gear is a type of valve gear used to regulate the flow of steam to the pistons in steam locomotives, invented by Belgian railway engineer Egide Walschaerts in 1844. The gear is sometimes named without the final "s", since it was incorrectly patented under that name. It was extensively used in steam locomotives from the late 19th century until the end of the steam era.
The Caprotti valve gear is a type of steam engine valve gear invented in the early 1920s by Italian architect and engineer Arturo Caprotti. It uses camshafts and poppet valves rather than the piston valves used in other valve gear. While basing his design on automotive valves, Caprotti made several significant departures from this design to adapt the valves for steam. Having agreed a joint-venture with Worcester-based engineering company Heenan & Froude from 1938, Heenan & Froude fully acquired Caprotti post-World War II in 1947.
The NZR A class were a class of steam locomotives built in 1906 with a 4-6-2 wheel arrangement for the New Zealand Railways Department (NZR). The class should not be confused with the older and more obscure A class of 1873. They were designed by the NZR's Chief Mechanical Engineer, A. L. Beattie and his Chief Draughtsman, G. A. Pearson to replace less powerful locomotives struggling with increasing loads on the South Island Main Trunk Railway, and in anticipation of the traffic volumes that would be created upon the completion of the North Island Main Trunk railway.
The A2 class was an express passenger locomotive that ran on Victorian Railways from 1907 to 1963. A highly successful design entirely the work of Victorian Railways' own design office, its long service life was repeatedly extended as the Great Depression and later World War II delayed the introduction of more modern and powerful replacement locomotives.
Henry Greenly (1876–1947) was amongst the foremost miniature railway engineers of the 20th century, remembered as a master of engineering design.
The Queensland Railways C17 class locomotive are a class of 4-8-0 steam locomotives operated by the Queensland Railways.
The WAGR S class was a class of 4-8-2 steam locomotives built by the Midland Railway Workshops between 1943 and 1947 and operated by the Western Australian Government Railways (WAGR).
The Queensland Railways BB18¼ class locomotive was a class of 4-6-2 steam locomotives operated by the Queensland Railways.
The Queensland Pioneer Steam Railway is located near Ipswich, Queensland, Australia and runs through the former West Moreton pioneering coal fields. It was first opened in 1881 by colliery proprietor and politician Lewis Thomas (1832-1913) as a tramway to his coal mines.
The South African Railways Class 19C 4-8-2 of 1935 was a steam locomotive.
The South African Railways Class 19B 4-8-2 of 1930 was a steam locomotive.
The Queensland Railways A10 Neilson class locomotive was a class of 0-4-2 steam locomotives operated by the Queensland Railways.
The Queensland Railways AC16 class locomotive was a class of 2-8-2 steam locomotives operated by the Queensland Railways.
The Queensland Railways C16 class locomotive is a class of 4-8-0 steam locomotives that was operated by the Queensland Railways.
The Queensland Railways B18¼ class locomotive was a class of 4-6-2 steam locomotives operated by the Queensland Railways.
The Queensland Railways DD17 class locomotive was a class of 4-6-4T steam locomotives operated by the Queensland Railways. It is an improved version of the earlier Queensland D17 locomotive.
The Queensland Railways D17 class locomotive was a class of 4-6-4T steam locomotives operated by the Queensland Railways.
The Queensland Railways C19 class locomotive was a class of 4-8-0 steam locomotives operated by the Queensland Railways.
The Queensland Railways B16½ class locomotive was a one-off 2-6-2 steam locomotive operated by the Queensland Railways.
The Queensland Railways B15 class locomotive is an old class of 4-6-0 engines operated by the Queensland Railways.
Media related to Queensland PB15 class locomotives at Wikimedia Commons