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Burma Railways GA.I to GA.IV

GA.II No. 208, the only one with compound cylinders

On the line from Mandalay to Lashio, Burma Railways not only had curve radii starting at 330 ft (100 m), but also a long gradient of four percent. For this purpose, four class GA.I Garratts were built in 1924 as Doubl...

	Burma Railways GA.I to GA.IV Remove
Variant	GA.I GA.I GA.II GA.III GA.IV
Built	1924
Manufacturers	Beyer, Peacock & Co.
Wheel arrangement	(1D)(D1) t ga
Gauge	1000 mm
Length
Service mass	100690 kg
Top speed
Power
Engine

General

Property	Burma Railways GA.I to GA.IV GA.I GA.I GA.II GA.III GA.IV Remove
Built	1924
Manufacturers	Beyer, Peacock & Co.
Wheel arrangement	2-8-0+0-8-2T (Double Consolidation (Garratt))
Gauge	1,000 mm

Dimensions and weights

Property	Burma Railways GA.I to GA.IV GA.I GA.I GA.II GA.III GA.IV Remove
Wheelbase	18.16 m
Service mass	100.7 t
Adhesion mass	81.6 t
Rigid wheelbase	2.24 m
Axle load	10.3 t
Water capacity	9,093 l
Fuel capacity	5.1 t (coal)

Boiler

Property	Burma Railways GA.I to GA.IV GA.I GA.I GA.II GA.III GA.IV Remove
Grate area	4.078 m²
Firebox surface	17.048 m²
Tube heating surface	144.139 m²
Evaporative heating surface	161.187 m²
Superheater surface	33.91 m²
Total heating surface	195.1 m²

Power plant

Property	Burma Railways GA.I to GA.IV GA.I GA.I GA.II GA.III GA.IV Remove
Driver diameter	991 mm
Boiler pressure	12.4 bar
Expansion type	simple expansion
Cylinders	four, 394 x 508 mm

Power

Property	Burma Railways GA.I to GA.IV GA.I GA.I GA.II GA.III GA.IV Remove
Power source	steam
Estimated power	932 kW (1,267 PS)
Starting effort	167.7 kN

Calculated values

Property	Burma Railways GA.I to GA.IV GA.I GA.I GA.II GA.III GA.IV Remove
Factor of adhesion	1 : 4.77
Optimal speed	34 km/h
Power-to-weight ratio	9.3 kW/t
Heating Surface Equivalent	314.2 m²
Cylinder volume/HSE	1 : 787.18
Adhesive weight/Total	1 : 1.23
Tractive force/Heating surface	1 : 17.95
Grate area/Heating surface	1 : 47.84
Firebox/Tube surface	1 : 8.45
Total/Superheater	1 : 4.75

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