South African Class NG G11 2-6-0+0-6-2

Specifications
Specifications
Configuration:;
• Whyte	2-6-0+0-6-2 (Double Mogul)
• UIC	♠ 1'C+C1'n4 – ♥ 1'C+C1'h4
Driver	3rd & 4th coupled axles
Gauge	2 ft narrow gauge
Leading dia.	21 in (533 mm)
Coupled dia.	30 in (762 mm)
Wheelbase	♠ 39 ft (11,887 mm); ♥ 39 ft 9 in (12,116 mm)
• Engine	10 ft 3 in (3,124 mm) each
• Coupled	5 ft 9 in (1,753 mm) each
Pivot centres	♠ 22 ft (6,706 mm); ♥ 22 ft 9 in (6,934 mm)
Length:;
• Over couplers	♠ 44 ft 7+1⁄2 in (13,602 mm); ♥ 45 ft 5 in (13,843 mm)
Height	10 ft 4 in (3,150 mm)
Frame type	Plate
Axle load	♠ 6 LT 3 cwt 3 qtr (6,287 kg); ♥ 6 LT 11 cwt (6,655 kg)
• Leading	♠ 4 LT 7 cwt 1 qtr (4,433 kg) front; 4 LT 5 cwt (4,318 kg) rear; ♥ 4 LT 16 cwt (4,877 kg) front; 4 LT 15 cwt 3 qtr (4,864 kg) rear
• 1st coupled	♠ 6 LT (6,096 kg); ♥ 6 LT 9 cwt 2 qtr (6,579 kg)
• 2nd coupled	♠ 6 LT 1 cwt 2 qtr (6,172 kg); ♥ 6 LT 8 cwt 2 qtr (6,528 kg)
• 3rd coupled	♠ 5 LT 17 cwt (5,944 kg); ♥ 6 LT 4 cwt 3 qtr (6,338 kg)
• 4th coupled	♠ 6 LT 0 cwt 2 qtr (6,122 kg); ♥ 6 LT 8 cwt 2 qtr (6,528 kg)
• 5th coupled	♠ 6 LT 3 cwt 3 qtr (6,287 kg); ♥ 6 LT 11 cwt (6,655 kg)
• 6th coupled	♠ 6 LT (6,096 kg); ♥ 6 LT 10 cwt 3 qtr (6,642 kg)
Adhesive weight	♠ 36 LT 2 cwt 3 qtr (36,720 kg); ♥ 39 LT 3 cwt (39,780 kg)
Loco weight	♠ 44 LT 15 cwt (45,470 kg); ♥ 48 LT 4 cwt 3 qtr (49,010 kg)
Fuel type	Coal
Fuel capacity	2 LT 10 cwt (2.5 t)
Water cap.	970 imp gal (4,410 L) front; 380 imp gal (1,730 L) rear
Firebox:
• Type	Belpaire
• Grate area	♠ 19.3 sq ft (1.79 m2); ♥ 19.5 sq ft (1.81 m2)
Boiler:;
• Pitch	5 ft 3 in (1,600 mm)
• Diameter	4 ft 2 in (1,270 mm)
• Tube plates	9 ft 3+3⁄8 in (2,829 mm)
• Small tubes	♠ 211: 1+3⁄4 in (44 mm); ♥ 115: 1+3⁄4 in (44 mm)
• Large tubes	♥ 13: 5+1⁄2 in (140 mm)
Boiler pressure	180 psi (1,241 kPa)
Safety valve	Ramsbottom
Heating surface:
• Firebox	♠ 81 sq ft (7.5 m2); ♥ 80.6 sq ft (7.49 m2)
• Tubes	♠ 899 sq ft (83.5 m2); ♥ 660.9 sq ft (61.40 m2)
• Total surface	♠ 980 sq ft (91 m2); ♥ 741.5 sq ft (68.89 m2)
Superheater:;
• Heating area	♥ 141.5 sq ft (13.15 m2)
Cylinders	Four
Cylinder size	10+1⁄2 in (267 mm) bore; 16 in (406 mm) stroke
Valve gear	Walschaerts
Valve type	♠ Slide – ♥ Piston
Couplers	Bell-and-hook (Cape); Johnston link-and-pin (Natal)

Type and origin
Type and origin
	♠ Saturated steam locomotives; ♥ Superheated steam locomotives
Power type	Steam
Designer	Beyer, Peacock & Company
Builder	Beyer, Peacock & Company
Serial number	5975–5977, 6199, 6200
Model	Class NG G11
Build date	1919–1925
Total produced	5

South African Class NG G11 2-6-0+0-6-2
South African Class NG G11 2-6-0+0-6-2
	NG G11 no. 54 Solly at Chelsea on 3 April 1990
Power type
Type and origin
	♠ Saturated steam locomotives; ♥ Superheated steam locomotives
Power type	Steam
Designer	Beyer, Peacock & Company
Builder	Beyer, Peacock & Company
Serial number	5975–5977, 6199, 6200
Model	Class NG G11
Build date	1919–1925
Total produced	5
Configuration:;
Specifications
Configuration:;
• Whyte	2-6-0+0-6-2 (Double Mogul)
• UIC	♠ 1'C+C1'n4 – ♥ 1'C+C1'h4
Driver	3rd & 4th coupled axles
Gauge	2 ft narrow gauge
Leading dia.	21 in (533 mm)
Coupled dia.	30 in (762 mm)
Wheelbase	♠ 39 ft (11,887 mm); ♥ 39 ft 9 in (12,116 mm)
• Engine	10 ft 3 in (3,124 mm) each
• Coupled	5 ft 9 in (1,753 mm) each
Pivot centres	♠ 22 ft (6,706 mm); ♥ 22 ft 9 in (6,934 mm)
Length:;
• Over couplers	♠ 44 ft 7+1⁄2 in (13,602 mm); ♥ 45 ft 5 in (13,843 mm)
Height	10 ft 4 in (3,150 mm)
Frame type	Plate
Axle load	♠ 6 LT 3 cwt 3 qtr (6,287 kg); ♥ 6 LT 11 cwt (6,655 kg)
• Leading	♠ 4 LT 7 cwt 1 qtr (4,433 kg) front; 4 LT 5 cwt (4,318 kg) rear; ♥ 4 LT 16 cwt (4,877 kg) front; 4 LT 15 cwt 3 qtr (4,864 kg) rear
• 1st coupled	♠ 6 LT (6,096 kg); ♥ 6 LT 9 cwt 2 qtr (6,579 kg)
• 2nd coupled	♠ 6 LT 1 cwt 2 qtr (6,172 kg); ♥ 6 LT 8 cwt 2 qtr (6,528 kg)
• 3rd coupled	♠ 5 LT 17 cwt (5,944 kg); ♥ 6 LT 4 cwt 3 qtr (6,338 kg)
• 4th coupled	♠ 6 LT 0 cwt 2 qtr (6,122 kg); ♥ 6 LT 8 cwt 2 qtr (6,528 kg)
• 5th coupled	♠ 6 LT 3 cwt 3 qtr (6,287 kg); ♥ 6 LT 11 cwt (6,655 kg)
• 6th coupled	♠ 6 LT (6,096 kg); ♥ 6 LT 10 cwt 3 qtr (6,642 kg)
Adhesive weight	♠ 36 LT 2 cwt 3 qtr (36,720 kg); ♥ 39 LT 3 cwt (39,780 kg)
Loco weight	♠ 44 LT 15 cwt (45,470 kg); ♥ 48 LT 4 cwt 3 qtr (49,010 kg)
Fuel type	Coal
Fuel capacity	2 LT 10 cwt (2.5 t)
Water cap.	970 imp gal (4,410 L) front; 380 imp gal (1,730 L) rear
Firebox:
• Type	Belpaire
• Grate area	♠ 19.3 sq ft (1.79 m2); ♥ 19.5 sq ft (1.81 m2)
Boiler:;
• Pitch	5 ft 3 in (1,600 mm)
• Diameter	4 ft 2 in (1,270 mm)
• Tube plates	9 ft 3+3⁄8 in (2,829 mm)
• Small tubes	♠ 211: 1+3⁄4 in (44 mm); ♥ 115: 1+3⁄4 in (44 mm)
• Large tubes	♥ 13: 5+1⁄2 in (140 mm)
Boiler pressure	180 psi (1,241 kPa)
Safety valve	Ramsbottom
Heating surface:
• Firebox	♠ 81 sq ft (7.5 m2); ♥ 80.6 sq ft (7.49 m2)
• Tubes	♠ 899 sq ft (83.5 m2); ♥ 660.9 sq ft (61.40 m2)
• Total surface	♠ 980 sq ft (91 m2); ♥ 741.5 sq ft (68.89 m2)
Superheater:;
• Heating area	♥ 141.5 sq ft (13.15 m2)
Cylinders	Four
Cylinder size	10+1⁄2 in (267 mm) bore; 16 in (406 mm) stroke
Valve gear	Walschaerts
Valve type	♠ Slide – ♥ Piston
Couplers	Bell-and-hook (Cape); Johnston link-and-pin (Natal)
Tractive effort
Performance figures
Tractive effort	♠♥ 15,876 lbf (70.62 kN) @ 75%
Operators
Career
Operators	South African Railways
Class	Class NG G11
Number in class	5
Numbers	♠ NG51-NG53 – ♥ NG54-NG55
Delivered	1919–1925
First run	1919
Withdrawn	1962–1974
Preserved	3

The South African Railways Class NG G11 2-6-0+0-6-2 of 1919 is a class of narrow gauge steam locomotives.

Between 1919 and 1925, the South African Railways (SAR) placed five Class NG G11 Garratt locomotives with a 2-6-0+0-6-2 Double Mogul type wheel arrangement in service on the Avontuur narrow gauge line through the Langkloof, and also in Natal. They were the first Garratt locomotives to enter service in South Africa.