Indian locomotive class HG

Specifications
Specifications
Configuration:;
• Whyte	2-8-0
• UIC	1'D n2 (HG class); 1'D h2 (HGS/HGC class)
Gauge	1,676 mm (5 ft 6 in)
Leading dia.	3 ft 7 in (1,090 mm)
Driver dia.	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels: 5 ft 1+1⁄2 in (1,562 mm); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels: 4 ft 8+1⁄2 in (1,435 mm)
Wheelbase:
• Coupled	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels: 17 ft (5.2 m); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels: 16 ft (4.9 m)
• incl. tender	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels, 4000 gallon tender: 51 ft 6+7⁄8 in (15.719 m); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels, 4000 gallon tender: 50 ft 4+1⁄2 in (15.354 m)
Length:;
• Over buffers	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels, 4000 gallon tender: 61 ft 6+1⁄4 in (18.752 m); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels, 4000 gallon tender: 60 ft 3+7⁄8 in (18.386 m)
Width	9 ft 6 in (2,900 mm)
Height	13 ft 6 in (4,110 mm)
Axle load	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels: 16.3 long tons (16.6 t); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels: 15.7 long tons (16.0 t)
Fuel type	Coal, later converted to oil-firing
Fuel capacity	7.6 LT (7.7 t) of coal (3000/4000 gal tenders); 10.2 LT (10.4 t) of coal (4500 gal tender);
Water cap.	3,000 or 4,000 or 4,500 imp gal (14,000 or 18,000 or 20,000 L; 3,600 or 4,800 or 5,400 US gal)
Firebox:
• Type	Belpaire
• Grate area	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels: 35 sq ft (3.3 m2); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels: 32 sq ft (3.0 m2)
Boiler pressure	180 psi (12.4 bar; 12.7 kgf/cm2)
Superheater	Schimdt (HGS, HGC)
Cylinders	Two, outside
Cylinder size	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels: 21 in × 26 in (533 mm × 660 mm); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels: 20 in × 26 in (508 mm × 660 mm)
Valve gear	Walschaerts
Valve type	Slide (HG class); Piston (HGS/HGC class)

Type and origin
Type and origin
Power type	Steam
Designer	British Engineering Standards Association
Builder	Vulcan Foundry; North British Locomotive Company; Robert Stephenson & Company; Kitson & Company; Beyer, Peacock & Company
Build date	c. 1907–1924
Total produced	More than 500

Indian locomotive class HG
Indian locomotive class HG
	Pakistan Railways HGS 2216 on the Khyber Pass Railway.
Power type
Type and origin
Power type	Steam
Designer	British Engineering Standards Association
Builder	Vulcan Foundry; North British Locomotive Company; Robert Stephenson & Company; Kitson & Company; Beyer, Peacock & Company
Build date	c. 1907–1924
Total produced	More than 500
Configuration:;
Specifications
Configuration:;
• Whyte	2-8-0
• UIC	1'D n2 (HG class); 1'D h2 (HGS/HGC class)
Gauge	1,676 mm (5 ft 6 in)
Leading dia.	3 ft 7 in (1,090 mm)
Driver dia.	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels: 5 ft 1+1⁄2 in (1,562 mm); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels: 4 ft 8+1⁄2 in (1,435 mm)
Wheelbase:
• Coupled	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels: 17 ft (5.2 m); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels: 16 ft (4.9 m)
• incl. tender	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels, 4000 gallon tender: 51 ft 6+7⁄8 in (15.719 m); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels, 4000 gallon tender: 50 ft 4+1⁄2 in (15.354 m)
Length:;
• Over buffers	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels, 4000 gallon tender: 61 ft 6+1⁄4 in (18.752 m); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels, 4000 gallon tender: 60 ft 3+7⁄8 in (18.386 m)
Width	9 ft 6 in (2,900 mm)
Height	13 ft 6 in (4,110 mm)
Axle load	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels: 16.3 long tons (16.6 t); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels: 15.7 long tons (16.0 t)
Fuel type	Coal, later converted to oil-firing
Fuel capacity	7.6 LT (7.7 t) of coal (3000/4000 gal tenders); 10.2 LT (10.4 t) of coal (4500 gal tender);
Water cap.	3,000 or 4,000 or 4,500 imp gal (14,000 or 18,000 or 20,000 L; 3,600 or 4,800 or 5,400 US gal)
Firebox:
• Type	Belpaire
• Grate area	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels: 35 sq ft (3.3 m2); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels: 32 sq ft (3.0 m2)
Boiler pressure	180 psi (12.4 bar; 12.7 kgf/cm2)
Superheater	Schimdt (HGS, HGC)
Cylinders	Two, outside
Cylinder size	Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels: 21 in × 26 in (533 mm × 660 mm); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels: 20 in × 26 in (508 mm × 660 mm)
Valve gear	Walschaerts
Valve type	Slide (HG class); Piston (HGS/HGC class)
Tractive effort
Performance figures
Tractive effort	Starting at 11.2 bar boiler pressure:; Variant with 5 ft 1+1⁄2 in (1,562 mm) diameter driving wheels: 146 kN (33,000 lbf); Variant with 4 ft 8+1⁄2 in (1,435 mm) diameter driving wheels: 134 kN (30,000 lbf)
Operators
Career
Operators	Indian Railways; Pakistan Railways
Locale	British Raj (until 1947); India (from 1947); Pakistan (from 1947)
Retired	Up until 2006
Preserved	2 (India); 4 (Pakistan)
Disposition	At least six preserved, remainder scrapped

The Indian locomotive class HG is a 2-8-0 goods traffic steam locomotive introduced in 1907 as one of seven standard locomotive designs developed by the Engineering Standards Committee (later the British Engineering Standards Association (BESA)) for use on British Indian railways. Locomotives of this design were rostered by various British Indian railways, later passing on to Indian Railways and Pakistan Railways after the partition, the latter of which continued using these locomotives into the 21st century to haul the Khyber Steam Safari on the rugged Khyber Pass Railway.