Imperial Government of Persia 2-6-0 Locomotives in Iran


Class Details by Steve Llanso of Sweat House Media

Class 300 (Locobase 15473)

Data from DeGolyer, Volume 79, pp. 657+. See also "The First Baldwin Locomotives for Persia", Baldwin Magazine, Volume 10 , No 4 (), p. 49.

Simple little Moguls with few extra appurtenances, although 8" (203 mm) piston valves admitted steam to the cylinders.

Road conditions consisted of 1/2% grades, gentle curves of 9.6 degrees (radii of 180 metres/591 feet), and 70 lb/yard (35 kg/metre) rail. Baldwin Magazine's report emphasized the need for speedy delivery as the customer specified a completion time of ten weeks "and the four locomotives were completed, dismantled and boxed for shipment to Bandar Shahpour well within the time limit."

Principal Dimensions by Steve Llanso of Middle Run Media

Class300
Locobase ID15473
RailroadImperial Government of Persia
CountryIran
Whyte2-6-0
Number in Class4
Road Numbers300-303
GaugeStd
Number Built4
BuilderBaldwin
Year1931
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10 / 3.05
Engine Wheelbase (ft / m)17.33 / 5.28
Ratio of driving wheelbase to overall engine wheelbase 0.58
Overall Wheelbase (engine & tender) (ft / m)45.27 / 13.80
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)71,000 / 32,205
Engine Weight (lbs / kg)87,000 / 39,463
Tender Loaded Weight (lbs / kg)86,000 / 39,009
Total Engine and Tender Weight (lbs / kg)173,000 / 78,472
Tender Water Capacity (gals / ML)4000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)1500 / 5678
Minimum weight of rail (calculated) (lb/yd / kg/m)39 / 19.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 1168
Boiler Pressure (psi / kPa)175 / 12.10
High Pressure Cylinders (dia x stroke) (in / mm)16" x 22" / 406x559
Tractive Effort (lbs / kg)18,212 / 8260.83
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.90
Heating Ability
Tubes (number - dia) (in / mm)186 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.50 / 2.90
Firebox Area (sq ft / m2)90 / 8.36
Grate Area (sq ft / m2)17.60 / 1.64
Evaporative Heating Surface (sq ft / m2)1017 / 94.52
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1017 / 94.52
Evaporative Heating Surface/Cylinder Volume198.65
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3080
Same as above plus superheater percentage3080
Same as above but substitute firebox area for grate area15,750
Power L13844
Power MT358.08

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