South African Class NG G16 2-6-2+2-6-2

Specifications
Specifications
Configuration:;
• Whyte	2-6-2+2-6-2
• UIC	1'C1'+1'C1'h4t
Driver	3rd & 4th coupled axles
Gauge	2 ft (610 mm) narrow
Leading dia.	21 in (533 mm)
Coupled dia.	33 in (838 mm)
Trailing dia.	21 in (533 mm)
Minimum curve	160 ft (49 m)
Wheelbase	43 ft 3 in (13,183 mm)
• Engine	13 ft 10+1⁄2 in (4,229 mm) each
• Coupled	6 ft 3 in (1,905 mm) each
Pivot centres	23 ft 9 in (7,239 mm)
Length:;
• Over couplers	48 ft 5+1⁄4 in (14,764 mm)
Width	7 ft (2,134 mm)
Height	10 ft 4 in (3,150 mm)
Frame type	Bar
Axle load	♠ 6 LT 18 cwt (7,011 kg); ♣ 6 LT 17 cwt 3 qtr (6,998 kg)
• Leading	♠ 6 LT 10 cwt (6,604 kg) front; 5 LT 14 cwt (5,791 kg) rear; ♣ 6 LT 7 cwt 2 qtr (6,477 kg) front; 6 LT 7 cwt 1 qtr (6,465 kg) rear
• 1st coupled	♠ 6 LT 18 cwt (7,011 kg); ♣ 6 LT 14 cwt 3 qtr (6,846 kg)
• 2nd coupled	♠ 6 LT 6 cwt (6,401 kg); ♣ 6 LT 17 cwt 3 qtr (6,998 kg)
• 3rd coupled	♠ 6 LT 4 cwt (6,299 kg); ♣ 6 LT 15 cwt (6,858 kg)
• 4th coupled	♠ 6 LT 15 cwt (6,858 kg); ♣ 6 LT 14 cwt 2 qtr (6,833 kg)
• 5th coupled	♠ 6 LT 17 cwt (6,960 kg); ♣ 6 LT 14 cwt (6,808 kg)
• 6th coupled	♠ 6 LT 1 cwt (6,147 kg); ♣ 6 LT 14 cwt 3 qtr (6,846 kg)
• Trailing	♠ 3 LT 14 cwt (3,759 kg) front; 3 LT 19 cwt (4,013 kg) rear; ♣ 4 LT 1 cwt 1 qtr (4,128 kg) front; 3 LT 10 cwt (3,556 kg) rear
Adhesive weight	♠ 39 LT 1 cwt (39,680 kg); ♣ 40 LT 10 cwt 3 qtr (41,190 kg)
Loco weight	♠ 59 LT 2 cwt (60,050 kg); ♣ 61 LT 5 cwt 2 qtr (62,260 kg)
Fuel type	Coal
Fuel capacity	♠ 4 LT (4.1 t); ♣ 6 LT 4 cwt (6.3 t)
Water cap.	♥ 1,285 imp gal (5,840 L) front; 540 imp gal (2,450 L) rear; ♣ 1,325 imp gal (6,020 L) front; ♦ 1,325 imp gal (6,020 L) front; 540 imp gal (2,450 L) rear
Firebox:
• Type	Round-top
• Grate area	19.5 sq ft (1.81 m2)
Boiler:;
• Pitch	5 ft 5 in (1,651 mm)
• Diameter	4 ft 7+3⁄4 in (1,416 mm)
• Tube plates	9 ft 3+5⁄8 in (2,835 mm)
• Small tubes	152: 1+3⁄4 in (44 mm)
• Large tubes	15: 5+1⁄2 in (140 mm)
Boiler pressure	180 psi (1,241 kPa)
Safety valve	Pop
Heating surface:
• Firebox	82.1 sq ft (7.63 m2)
• Tubes	839 sq ft (77.9 m2)
• Total surface	921.1 sq ft (85.57 m2)
Superheater:;
• Heating area	149 sq ft (13.8 m2)
Cylinders	4
Cylinder size	12 in (305 mm) bore; 16 in (406 mm) stroke
Valve gear	Walschaerts
Valve type	Piston
Couplers	Bell-and-hook (Cape); Johnston link-and-pin (Natal)

Type and origin
Type and origin
	♠ All except no. NG137-NG143; ♥ All except no. NG137-NG143 & NG149-NG156; ♣ No. NG137-NG143 – ♦ No. NG149-NG156
Power type	Steam
Designer	Hannoversche Maschinenbau AG; South African Railways
Builder	Société Anonyme John Cockerill; Beyer, Peacock & Company; Hunslet-Taylor
Serial number	Cockerill 3265-3268; Beyer, Peacock 6919-6926, 7426-7432, 7862-7868; Hunslet-Taylor 3894-3901
Model	Class NG G16
Build date	1937-1968
Total produced	34
Rebuilder	Alfred County Railway
Rebuild date	1989-1990
Number rebuilt	2 to Class NG G16A

South African Class NG G16 2-6-2+2-6-2
South African Class NG G16 2-6-2+2-6-2
	No. NG113 at Sandstone Estates in April 2006
Power type
Type and origin
	♠ All except no. NG137-NG143; ♥ All except no. NG137-NG143 & NG149-NG156; ♣ No. NG137-NG143 – ♦ No. NG149-NG156
Power type	Steam
Designer	Hannoversche Maschinenbau AG; South African Railways
Builder	Société Anonyme John Cockerill; Beyer, Peacock & Company; Hunslet-Taylor
Serial number	Cockerill 3265-3268; Beyer, Peacock 6919-6926, 7426-7432, 7862-7868; Hunslet-Taylor 3894-3901
Model	Class NG G16
Build date	1937-1968
Total produced	34
Rebuilder	Alfred County Railway
Rebuild date	1989-1990
Number rebuilt	2 to Class NG G16A
Configuration:;
Specifications
Configuration:;
• Whyte	2-6-2+2-6-2
• UIC	1'C1'+1'C1'h4t
Driver	3rd & 4th coupled axles
Gauge	2 ft (610 mm) narrow
Leading dia.	21 in (533 mm)
Coupled dia.	33 in (838 mm)
Trailing dia.	21 in (533 mm)
Minimum curve	160 ft (49 m)
Wheelbase	43 ft 3 in (13,183 mm)
• Engine	13 ft 10+1⁄2 in (4,229 mm) each
• Coupled	6 ft 3 in (1,905 mm) each
Pivot centres	23 ft 9 in (7,239 mm)
Length:;
• Over couplers	48 ft 5+1⁄4 in (14,764 mm)
Width	7 ft (2,134 mm)
Height	10 ft 4 in (3,150 mm)
Frame type	Bar
Axle load	♠ 6 LT 18 cwt (7,011 kg); ♣ 6 LT 17 cwt 3 qtr (6,998 kg)
• Leading	♠ 6 LT 10 cwt (6,604 kg) front; 5 LT 14 cwt (5,791 kg) rear; ♣ 6 LT 7 cwt 2 qtr (6,477 kg) front; 6 LT 7 cwt 1 qtr (6,465 kg) rear
• 1st coupled	♠ 6 LT 18 cwt (7,011 kg); ♣ 6 LT 14 cwt 3 qtr (6,846 kg)
• 2nd coupled	♠ 6 LT 6 cwt (6,401 kg); ♣ 6 LT 17 cwt 3 qtr (6,998 kg)
• 3rd coupled	♠ 6 LT 4 cwt (6,299 kg); ♣ 6 LT 15 cwt (6,858 kg)
• 4th coupled	♠ 6 LT 15 cwt (6,858 kg); ♣ 6 LT 14 cwt 2 qtr (6,833 kg)
• 5th coupled	♠ 6 LT 17 cwt (6,960 kg); ♣ 6 LT 14 cwt (6,808 kg)
• 6th coupled	♠ 6 LT 1 cwt (6,147 kg); ♣ 6 LT 14 cwt 3 qtr (6,846 kg)
• Trailing	♠ 3 LT 14 cwt (3,759 kg) front; 3 LT 19 cwt (4,013 kg) rear; ♣ 4 LT 1 cwt 1 qtr (4,128 kg) front; 3 LT 10 cwt (3,556 kg) rear
Adhesive weight	♠ 39 LT 1 cwt (39,680 kg); ♣ 40 LT 10 cwt 3 qtr (41,190 kg)
Loco weight	♠ 59 LT 2 cwt (60,050 kg); ♣ 61 LT 5 cwt 2 qtr (62,260 kg)
Fuel type	Coal
Fuel capacity	♠ 4 LT (4.1 t); ♣ 6 LT 4 cwt (6.3 t)
Water cap.	♥ 1,285 imp gal (5,840 L) front; 540 imp gal (2,450 L) rear; ♣ 1,325 imp gal (6,020 L) front; ♦ 1,325 imp gal (6,020 L) front; 540 imp gal (2,450 L) rear
Firebox:
• Type	Round-top
• Grate area	19.5 sq ft (1.81 m2)
Boiler:;
• Pitch	5 ft 5 in (1,651 mm)
• Diameter	4 ft 7+3⁄4 in (1,416 mm)
• Tube plates	9 ft 3+5⁄8 in (2,835 mm)
• Small tubes	152: 1+3⁄4 in (44 mm)
• Large tubes	15: 5+1⁄2 in (140 mm)
Boiler pressure	180 psi (1,241 kPa)
Safety valve	Pop
Heating surface:
• Firebox	82.1 sq ft (7.63 m2)
• Tubes	839 sq ft (77.9 m2)
• Total surface	921.1 sq ft (85.57 m2)
Superheater:;
• Heating area	149 sq ft (13.8 m2)
Cylinders	4
Cylinder size	12 in (305 mm) bore; 16 in (406 mm) stroke
Valve gear	Walschaerts
Valve type	Piston
Couplers	Bell-and-hook (Cape); Johnston link-and-pin (Natal)
Tractive effort
Performance figures
Tractive effort	18,850 lbf (83.8 kN) @ 75%
Operators
Career
Operators	South African Railways; Alfred County Railway; Welsh Highland Railway
Class	Class NG G16
Number in class	34
Numbers	NG85-NG88, NG109-NG116, NG125-NG131, NG137-NG143, NG149-NG156
Delivered	1937-1968
First run	1937

The South African Railways Class NG G16 2-6-2+2-6-2 is a narrow gauge steam locomotive class.

Between 1937 and 1968, the South African Railways placed 34 Class NG G16 Garratt articulated 2-6-2+2-6-2 steam locomotives in service on the Avontuur Railway and on the Natal narrow gauge lines.