Data from "Recent Locomotives for India and South Africa," The Locomotive Magazine, Vol IX (5 September 1903), p. 146. (Thanks to Abhijit Gore for his 2 January 2021 email supplying all the builders, builder's numbers, and road number -- very useful information.)
Works numbers were Neilson, Reid & Co (works numbers were 5908-5932 in 1901, road numbers 180-204), Sharp, Stewart & Co (works numbers 4982-4993 in 1903, road numbers 205-2016), and North British Locomotive Company---not long after Neilson, Reid; Sharp, Stewar; and Dubs & Company combined to form NBLC-- (works numbers 15768-15782 in 1903, road numbers 217-231).
Indian Midland operated this design as its standard goods locomotive, a service it would continue to perform when the IM was incorporated into the Great Indian Peninsular Railway. The profile shows a locomotive with a slender dome over the center coupled axle, a large-diameter leading wheel in the front truck, and a generally sturdy look. Although earlier IMRwy F2 and F3 class Moguls had Belpaire fireboxes, this class did not.
Although a large IM class, the engines only wore that livery briefly. In 1904, the IM was merged with the Great Indian Peninsula Railway, which led to adding 1,000 to each of the locomotives' road numbers.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | F4 |
| Locobase ID | 10326 |
| Railroad | Indian Midland (GIP) |
| Country | India |
| Whyte | 2-6-0 |
| Number in Class | 52 |
| Road Numbers | 180-231/1180-1231 |
| Gauge | 5'6" |
| Number Built | 52 |
| Builder | several |
| Year | 1903 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13 / 3.96 |
| Engine Wheelbase (ft / m) | 18.67 / 5.69 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.70 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 30,688 / 13,920 |
| Weight on Drivers (lbs / kg) | 89,376 / 40,540 |
| Engine Weight (lbs / kg) | 108,416 / 49,177 |
| Tender Loaded Weight (lbs / kg) | 88,368 / 40,083 |
| Total Engine and Tender Weight (lbs / kg) | 196,784 / 89,260 |
| Tender Water Capacity (gals / ML) | 3600 / 13.64 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 50 / 25 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 54.50 / 1384 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18.5" x 26" / 470x660 |
| Tractive Effort (lbs / kg) | 24,981 / 11331.20 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.58 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 224 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 103 / 9.57 |
| Grate Area (sq ft / m2) | 21.25 / 1.97 |
| Evaporative Heating Surface (sq ft / m2) | 1238 / 115.06 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1238 / 115.06 |
| Evaporative Heating Surface/Cylinder Volume | 153.05 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3825 |
| Same as above plus superheater percentage | 3825 |
| Same as above but substitute firebox area for grate area | 18,540 |
| Power L1 | 3543 |
| Power MT | 262.18 |