Libyan Beyer-Garratt Locomotives in Libya

Class Details by Steve Llanso of Sweat House Media

Class 504 (Locobase 9966)

Data from JP Crozet's Franco-Ethiopian Railway site, [], last accessed on 21 February 2009; and A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), pp 103-104. Ansaldo works numbers 1374-1376.

The three Libyan Garratts were diverted from an order of 6 originally intended for Ethipia (see Locobase 506). This entry describes the three that were diverted to Libya. One of them went down with its ship in the Mediterranean. Durrant wrote that the other two "were so badly damaged by bombing that they were scrapped in 1945.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID9966
Number in Class2
Road Numbers504-506
Gauge95 cm
Number Built3
Valve Gear
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)
Weight on Drivers (lbs / kg)132,277 / 60,000
Engine Weight (lbs / kg)191,802 / 87,000
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)191,802 / 87,000
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)28 / 14
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)41.30 / 1050
Boiler Pressure (psi / kPa)203.10 / 14
High Pressure Cylinders (dia x stroke) (in / mm)14.96" x 21.65" / 380x550 (4)
Tractive Effort (lbs / kg)40,507 / 18373.69
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.27
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)32.28 / 3
Evaporative Heating Surface (sq ft / m2)1442 / 134
Superheating Surface (sq ft / m2)565 / 52.50
Combined Heating Surface (sq ft / m2)2007 / 186.50
Evaporative Heating Surface/Cylinder Volume163.70
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6556
Same as above plus superheater percentage8392
Same as above but substitute firebox area for grate area
Power L1
Power MT

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