Data from The Engineer; January 19, 1900. Works numbers were 676-677.
"We are enabled to illustrate the trucks and locomotives forming the siege train which was suppled to the War-office by Kerr, Stuart, and Co., Limited, last November."
The Engineer's somewhat breathless account of the miracle of this siege train begins with the diversion of two of the three Sirdar-type tank locomotives ordered by the Egyptian Government. This design was already in widespread use in several countries.
In fact, the builder hadn't begun assembling the Egyptian engines when word came through that the British government would be ordering them for use in the War against the Boers in South Africa that had recently broken out.
On 15 November 1899, K-S began construction and delivery came a week later on 22 November after tests. "Some of the men engaged on this part of the order," said the Engineer, "...voluntarily worked for three days and three nights without stopping. " The writer commented that the Sirdar's popularity meant that parts were already available.
"Even allowing for this, however," the Engineer asserts, ... it was a wonderful piece of work to get them out in the time."
A few year later, the British Army sold these to the Central African Railways.
Data from SAR diagram reproduced by Peter Ball, "Cape Gauge - From Ox-wagon to Iron Horse", 15 November 2015 at 20:22 in The Heritage Portal (South Africa), last accessed 6 May 2018.
These two small Harbour locomotives were named Stormberg and Thebus.
Data from "Steam Rail Motor Coach, Central South African Railways", Vol XIII (15 April 1907), p. 72.
This design fell into the group of steam rail motor sets that combined a stubby tank-engine as one "bogie" semi-permanently coupled to the trailing coach. The carriage body was subdivided in the usual pattern of luggage compartment, two passenger compartments that held a total of 48 passengers, and a second driver's position.
Data from "South African NG 0-4-0T", Wikipedia, the free encyclopedia, last accessed 22 November 2018.
Three locomotives including one built in 1900
2 ex-Rand Mines, 1 ex-Reynolds
Principal Dimensions by Steve Llanso of Middle Run Media | ||||
---|---|---|---|---|
Class | NG 1 | Stormberg | unknown | unknown |
Locobase ID | 992 | 20370 | 10617 | 994 |
Railroad | South African Railways (SAR) | South African Railways (SAR) | Central South African (SAR) | Rand Mines (SAR) |
Country | South Africa | South Africa | South Africa | South Africa |
Whyte | 0-4-0T | 0-4-0ST | 0-4-0T+4 | 0-4-0T |
Number in Class | 2 | 2 | 1 | 3 |
Road Numbers | NG 40-NG 41 | NG91-92, NG95 | ||
Gauge | 2' | 3'6" | 3'6" | 2' |
Number Built | 2 | 2 | 1 | 3 |
Builder | Kerr, Stuart & Co | Hudswell, Clarke | Kitson & Co | Avonside |
Year | 1900 | 1903 | 1906 | 1899 |
Valve Gear | Stephenson | Stephenson | Walschaert | |
Locomotive Length and Weight | ||||
Driver Wheelbase (ft / m) | 3.50 / 1.07 | 8 / 2.44 | 8 / 2.44 | 3.50 / 1.07 |
Engine Wheelbase (ft / m) | 3.50 / 1.07 | 51.58 / 15.72 | 51.58 / 15.72 | 3.50 / 1.07 |
Ratio of driving wheelbase to overall engine wheelbase | 1 | 0.16 | 0.16 | 1 |
Overall Wheelbase (engine & tender) (ft / m) | 51.58 / 15.72 | 51.58 / 15.72 | 3.50 / 1.07 | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 6970 / 3162 | |||
Weight on Drivers (lbs / kg) | 13,940 / 6323 | 35,392 / 16,054 | 12,880 / 5842 | |
Engine Weight (lbs / kg) | 13,940 / 6323 | 35,392 / 16,054 | 106,540 / 48,326 | 12,880 / 5842 |
Tender Loaded Weight (lbs / kg) | ||||
Total Engine and Tender Weight (lbs / kg) | 13,940 / 6323 | 12,880 / 5842 | ||
Tender Water Capacity (gals / ML) | 108 / 0.41 | 480 / 1.82 | 600 / 2.27 | 132 / 0.50 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 0.55 / 1 | 2.20 / 2 | 0.20 | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 12 / 6 | 29 / 14.50 | 11 / 5.50 | |
Geometry Relating to Tractive Effort | ||||
Driver Diameter (in / mm) | 24 / 610 | 33 / 838 | 43 / 1092 | 20 / 508 |
Boiler Pressure (psi / kPa) | 140 / 970 | 150 / 1030 | 160 / 1100 | 140 / 970 |
High Pressure Cylinders (dia x stroke) (in / mm) | 6" x 10" / 152x254 | 10" x 16" / 254x406 | 11" x 16" / 279x406 | 7" x 10" / 178x254 |
Tractive Effort (lbs / kg) | 1785 / 809.66 | 6182 / 2804.11 | 6123 / 2777.35 | 2916 / 1322.68 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 7.81 | 5.73 | 4.42 | |
Heating Ability | ||||
Tubes (number - dia) (in / mm) | 36 - 1.75" / 0 | 58 - 2" / 51 | ||
Flues (number - dia) (in / mm) | ||||
Flue/Tube length (ft / m) | 5.25 | 5.58 / 1.70 | ||
Firebox Area (sq ft / m2) | 16.50 / 1.53 | 32.50 / 3.02 | ||
Grate Area (sq ft / m2) | 3.33 / 0.31 | 5.25 / 0.49 | 10.75 / 1 | 5.50 / 0.51 |
Evaporative Heating Surface (sq ft / m2) | 100 / 9.29 | 234 / 21.74 | 510 / 47.40 | |
Superheating Surface (sq ft / m2) | ||||
Combined Heating Surface (sq ft / m2) | 100 / 9.29 | 234 / 21.74 | 510 / 47.40 | |
Evaporative Heating Surface/Cylinder Volume | 305.58 | 160.89 | 289.79 | |
Computations Relating to Power Output (More Information) | ||||
Robert LeMassena's Power Computation | 466 | 788 | 1720 | 770 |
Same as above plus superheater percentage | 466 | 788 | 1720 | 770 |
Same as above but substitute firebox area for grate area | 2310 | 4875 | ||
Power L1 | 3123 | 2249 | ||
Power MT | 987.81 | 280.19 |