China Railways QJ

QJ
前进

Preserved locomotives 6988 and 7081 operating with Milwaukee Road 261 on the Iowa Interstate (Sept. 2006)

Type and origin Power type Steam Builder Prototypes Dalian : HP 0001-0005 Tangshan : HP 1001-1008 Shenyang : HP 1501-1506 Mudanjiang : HP 2001-2003 Changchun : HP 3001-3002 Datong : HP 3501-3508 Main production Datong QJ 101 - 3602¶ and QJ 6001-7207 Build date 1956–1988† Total produced >4700

Specifications Configuration 2-10-2 UIC class 1′E1′ Gauge mostly 1,435 mm (4 ft 8 1⁄2 in), some 1,520 mm (4 ft 11 27⁄32 in) Driver dia. 1,500 mm (59.06 in)* Length including tender 26.0 m (85 ft 4 in) (with 8 wheel tender)‡ 29.2 m (95 ft 10 in) (with 12 wheel tender)†‡ Loco weight 133.3 tonnes (131.2 long tons; 146.9 short tons)* Boiler pressure 1,471 kPa (213 lbf/in2)* Cylinder size 650 mm × 800 mm (25.59 in × 31.50 in)* bore x stroke

Performance figures Maximum speed 80 km/h (50 mph)* Power output 2,222 kW (2,980 hp) (official), 2,670 kW (3,580 hp) (measured at 66 km/h or 41 mph)* Tractive effort 63,235 lbf (281.28 kN)

source † source ‡ source ¶ Excluding numbers used for prototypes

The QJ (Chinese: 前进; pinyin: Qián Jìn; literally: "To go forward or to advance") was a type of heavy freight steam locomotive used by China Railways. The majority were made by Datong locomotive factory. The prototypes and early production of the class were designated HP (和平 Heping, meaning 'peace'), being redesignated as FD class during the cultural revolution before becoming the QJ class in 1971.

The class became the primary mainline freight locomotive on the Chinese rail network by the 1980s, and were then displaced by diesel locomotives during the 1990s. After the end of steam on the national Chinese railway network many QJ locomotives were used on industrial lines, as well as on the Jitong railway. Several of the class have been preserved.

42 prototypes were made by Dalian locomotive works, Tangshan locomotive works, and Shenyang, Mudanjiang, Changchun and Datong locomotive factories between 1956 and 1960. Originally the locomotives were designated as the HP (Heping meaning 'peace') class. The design is thought to be based in part on the Russian LV class. (see Russian).

The main tranche of production took place at Datong, beginning in 1964 starting with locomotive HP 101. A number of modifications were made to the locomotive including a new design of boiler, for the production version. The 500th QJ was built in 1968, the 1000th in 1970, the 2000th in 1974 and the 3000th in 1979, with production rates varying from 150 to over 300 per year between 1966 and 1985. Production ended in 1988.

In 1966 during the cultural revolution the locomotives were given the class FD (反帝 Fandi meaning 'anti-imperialism'), after 1971 the class was renamed again becoming the QJ class (Qian Jin, meaning 'march forward' or 'progress').

The prototypes used 8 wheel tenders, while later production models used 12 wheel tenders. QJs were equipped with mechanical stokers, feedwater heaters, electric lights, and air horns. Various modifications were used on some machines, including an ejector similar to the giesl type and smoke deflectors. One unit was used as a test bed for a 'Gas Producer Combustion System' (GPCS) in the 1980s.