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Prussian T 4

type Moabit

Under the designation T 4, the Prussian State Railways grouped various different tank locomotives with two coupled axles and a carrying axle , which were primarily developed for suburban traffic. The engines were prod...

	Prussian T 4 Remove
Variant	T 4 Moabit type T 4 Moabit type T 4[h]1[/h] T 4[h]2[/h] T 4[h]3[/h]
Built	1882
Manufacturers	Borsig
Wheel arrangement	1B t
Gauge	1435 mm
Length	9780 mm
Service mass	40700 kg
Top speed	75 km/h
Power
Engine

General

Property	Prussian T 4 T 4 Moabit type T 4 Moabit type T 4[h]1[/h] T 4[h]2[/h] T 4[h]3[/h] Remove
Built	1882
Manufacturers	Borsig
Wheel arrangement	2-4-0T (Porter)
Gauge	1,435 mm

Dimensions and weights

Property	Prussian T 4 T 4 Moabit type T 4 Moabit type T 4[h]1[/h] T 4[h]2[/h] T 4[h]3[/h] Remove
Length	9.78 m
Service mass	40.7 t
Adhesion mass	27 t
Axle load	13.5 t

Boiler

Property	Prussian T 4 T 4 Moabit type T 4 Moabit type T 4[h]1[/h] T 4[h]2[/h] T 4[h]3[/h] Remove
Grate area	1.37 m²
Evaporative heating surface	90.67 m²
Total heating surface	90.7 m²

Power plant

Property	Prussian T 4 T 4 Moabit type T 4 Moabit type T 4[h]1[/h] T 4[h]2[/h] T 4[h]3[/h] Remove
Driver diameter	1,514 mm
Boiler pressure	10 bar
Expansion type	simple expansion
Cylinders	two, 420 x 610 mm

Power

Property	Prussian T 4 T 4 Moabit type T 4 Moabit type T 4[h]1[/h] T 4[h]2[/h] T 4[h]3[/h] Remove
Power source	steam
Estimated power	275 kW (374 PS)
Top speed	75 km/h
Starting effort	60.4 kN

Calculated values

Property	Prussian T 4 T 4 Moabit type T 4 Moabit type T 4[h]1[/h] T 4[h]2[/h] T 4[h]3[/h] Remove
Factor of adhesion	1 : 4.38
Optimal speed	27 km/h
Power-to-weight ratio	6.8 kW/t
Adhesive weight/Total	1 : 1.51
Tractive force/Heating surface	1 : 13.92
Grate area/Heating surface	1 : 66.18

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