Queensland PB15 class locomotive

Queensland PB15 class

PB15 No. 448 at Swanbank

Type and origin
Power type	Steam
Designer	Henry Horniblow and L. W. Piggott.
Builder	Evans, Anderson, Phelan & Co. (70,) North Ipswich Railway Workshops (1), Kitson & Co. (20), Toowoomba Foundry (20), Walkers Limited (122)
Build date	1899–1926
Total produced	233

Specifications
Configuration	4-6-0
UIC class	2′C n2
Gauge	3 ft 6 in (1,067 mm)
Leading dia.	26 in (660 mm)
Driver dia.	48 in (1,219 mm)
Length	47 ft 6 in (14.48 m)
Axle load	8.1 tonnes (8.0 long tons; 8.9 short tons)
Loco weight	32 tonnes (31.5 long tons; 35.3 short tons)
Tender weight	24 tonnes (23.62096 long tons; 26.45547 short tons)
Total weight	56 tonnes (55.115566 long tons; 61.729433 short tons)
Fuel type	Coal, Water
Fuel capacity	4 tonnes (3.9 long tons; 4.4 short tons)
Water cap	2,500 imperial gallons (11,000 l; 3,000 US gal)
Firebox: • Firegrate area	12 sq ft (1.1 m²)
Boiler pressure	150 psi (1,034 kPa), later upgraded to 160 psi (1,103 kPa)
Heating surface: • Tubes and flues	780 sq ft (72 m²)
Superheater	None
Cylinders	Two outside
Cylinder size	15 in × 20 in (381 mm × 508 mm)
Valve gear	Stephenson (locos built 1899–1912) Walschaerts (locos built 1924–26)

Performance figures
Tractive effort	12,750 lbf (56.71 kN)

Career
Operators	Queensland Railways
Numbers	347–362, 385–384, 404–413, 434–509, 518–537, 540–609, 12, 5, 103, 126, 128, 143, 220, 286, 339, 340, 731–751
Nicknames	Walschaerts (Walschaert variants only)
Preserved	444, 448, 454, 732, 738
Disposition	Five preserved, remainder scrapped

The PB15 class engine is a 4-6-0 engine of the Queensland Railways. These engines have operated on 1,067 mm (3 ft 6 in) gauge.

Overview

The design resulted from a need for more powerful engines for passenger trains. The PB15 Class was designed by Locomotive Engineer, Henry Horniblow and L. W. Piggott. The “P”, which was used to denote “Passenger”, was added to the classification of the new locomotives to distinguish them from the earlier B15 Class, which were primarily goods engines. The “B”, is used to identify the number of coupled wheels, being six coupled wheels for the PB15 class, followed by numerals indicating the cylinder diameter of fifteen inches (381 mm). The PB15s were in essence identical to the B15s.

Variations

The first PB15 engines were delivered by Walkers Ltd, Maryborough in April 1900. The original locomotives delivered between 1900 and 1912 were fitted with Stephensons Valve Gear. Walkers Ltd manufactured a further 30 improved PB15 Class locomotives between 1924 and 1926 and these were fitted with Walschaerts Valve Gear. This earned this variant of the PB15 the nickname Walschaerts. At the height of their service there were approximately 230 locomotives in service in Queensland. Additionally, in May 1918, No. 411 was converted at North Ipswich Railway Workshops into a tank engine, the one off member of the 6D15 class. In March 1922 however, due to poor performance it was converted back to its original tender form.^[1]

In 1932, a number of PB 15-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 were Nos. 351, 508, 567, 574, 587, 591, and 750, the last mentioned being a Walschaerts or 1924 type PB15. Later, the rear sanding equipment attached to No.591 was removed and PB15 No. 525 was fitted in lieu.

Preservation

PB15 448 is seen on Saturday 18th September 2015 depart Bundamba Racecourse with a excursion to Box Flat at Queensland Pioneer Steam Railway.

No. 732 of the Queensland Rail Heritage Fleet at Workshops Rail Museum in 2011.

Five examples of this PB15 engines have been preserved:

No. 444 is on display at the Workshops Rail Museum, in Ipswich, Queensland.
No. 448 is operational on the Queensland Pioneer Steam Railway, Swanbank, Queensland,^[2] and has been named in preservation "R. V. Armstrong", after the society's late founding member.
No. 454 is undergoing a major overhaul at the Bellarine Peninsula Railway, Queenscliff, Victoria.
No. 732 is in storage at the QR Heritage Fleet's at North Ipswich, Queensland.^[3] One of the 1924 Walschaerts.
No. 738 is on display at the Rosewood Railway Museum, Rosewood, Queensland. One of the 1924 Walschaerts.

References

↑ "PB15 Class « qrig.org – queensland railway's interest group". Queensland Rail Interest Group. Retrieved 31 October 2013.
↑ "Archived copy". Archived from the original on July 24, 2011. Retrieved April 23, 2012.
↑ http://www.theworkshops.qm.qld.gov.au/

External links

Media related to Queensland PB15 class locomotives at Wikimedia Commons
PB15-class Queensland's Railways Interest Group.
Queensland Pioneer Steam Railway

Queensland Rail rolling stock

Queensland Railways steam locomotives	4D10 4D11½ Abt 6D11½ Crane 6D11½ Motor 6D13 6D13½ Abt 6D13½ 6D15 6D16 6D17 8D15 A10 Avonside A10 Baldwin A10 Fairlie A10 Ipswich A10 Neilson A11 A12 A12 (small) A14 AC16 B11 (C) B11 Baldwin B11 (E) B12 B13 B13½ B15 B16½ B17 B18¼ BB18¼ C13 Baldwin C13 Dubs C15 C16 C17 C18 C19 CC19 D17 DD17 PB15 ASG Beyer-Garratt

Queensland Railways diesel locomotives	1150 1170 1200 1225 1250 1270 1300 1400 1450 1460 1502 1550 1600 1620 1700 1720 2100 2130 2141 2150 2170 2250 2300 2350 2370 2400 2450 2470 2600 2800 4000 4100 DL DH

Aurizon electric locomotives	3100/3200 3300/3400 3500/3600 3551 3700 3800 3900

Queensland Rail electric multiple units	EMU ICE SMU IMU NGR Electric Tilt Train

Queensland Rail diesel rail motors and multiple units	McKeen 1800 1900 2000 Diesel Tilt Train

Pacific National locomotives	Diesel: PN, 83, 88 Electric: 71

BHP Billiton Mitsubishi Alliance locomotives	Electric: BMACC

Downer Rail locomotives	Diesel: LDP

Carriages	Davidson, Evans, M, L, Sunshine Express, SX

Rail transport in Queensland

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