Data from Gavin Hamilton's excellent compilation of Garratt data posted at [] (6 September 2005); and A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p.62-63. See also "Railways in Iran - Part 10 - Motive Power" on Roger Farnsworth's website at [
]; and "Iran: the rarely visited East" on the FarRail Tours website at "[
] last accessed 13 March 2023. Works numbers were 6787-6790 in 1936.
Principal Dimensions by Steve Llanso of Sweat House Media | |
---|---|
Class | 86 |
Locobase ID | 691 |
Railroad | Trans Iranian Railway |
Country | Iran |
Whyte | 4-8-2+2-8-4 |
Number in Class | 4 |
Road Numbers | 418-421/86.01-86.04 |
Gauge | Std |
Number Built | 4 |
Builder | Beyer, Peacock |
Year | 1936 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | |
Engine Wheelbase (ft / m) | |
Ratio of driving wheelbase to overall engine wheelbase | |
Overall Wheelbase (engine & tender) (ft / m) | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 33,069 / 15,000 |
Weight on Drivers (lbs / kg) | 263,983 / 119,741 |
Engine Weight (lbs / kg) | 450,911 / 204,530 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | 450,911 / 204,530 |
Tender Water Capacity (gals / ML) | 6756 / 25.59 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 55 / 27.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 53.10 / 1349 |
Boiler Pressure (psi / kPa) | 200.20 / 13.80 |
High Pressure Cylinders (dia x stroke) (in / mm) | 19.29" x 25.98" / 490x660 (4) |
Tractive Effort (lbs / kg) | 61,962 / 28105.52 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.26 |
Heating Ability | |
Tubes (number - dia) (in / mm) | |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | |
Firebox Area (sq ft / m2) | 277.61 / 25.80 |
Grate Area (sq ft / m2) | 68.33 / 6.35 |
Evaporative Heating Surface (sq ft / m2) | 3612 / 335.69 |
Superheating Surface (sq ft / m2) | 874 / 81.23 |
Combined Heating Surface (sq ft / m2) | 4486 / 416.92 |
Evaporative Heating Surface/Cylinder Volume | 205.51 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 13,680 |
Same as above plus superheater percentage | 16,279 |
Same as above but substitute firebox area for grate area | 66,137 |
Power L1 | 12,970 |
Power MT | 866.54 |