Mecklenburg P 3.1

The steam locomotives of DRG Class 34.73, formerly the Mecklenburg Class P 3.1 were passenger train locomotives operated by the Grand Duchy of Mecklenburg Friedrich-Franz Railway and were based on the Prussian P 3.1. They were sometimes used in express train services to begin with. Of the 41 examples belonging to this administration, which were built between 1888 and 1908, two originally came from the Lloyd Railway (Neustrelitz-Warnemünde). One improvement over the Mecklenburg P 2 was the braked coupled axle.

Mecklenburg P 3.1 DRG Class 34.73
Liesel 22-10-2010 pr. P 3.1 Magdeburg 323
Number(s)	Railway nos. 101–141 DRG 34 7301–34 7308 and 34 7351–34 7364
Quantity	41
Year(s) of manufacture	1888–1907
Wheel arrangement	2-4-0
Axle arrangement	1B n2
Track gauge	1,435 mm (4 ft 8 1⁄2 in)
Length over buffers	14,793 mm (48 ft 6.4 in)
Service weight	36.52 t
Adhesive weight	24.70 t
Axle load	12.35 t
Top speed	90 km/h (56 mph)
Driving wheel diameter	1,750 mm (5 ft 9 in)
Leading wheel diameter	1,150 mm (3 ft 9 in)
Cylinder bore	400 mm (16 in)
Piston stroke	560 mm (22 in)
Boiler Overpressure	12 bar
Grate area	1.87 m2 (20.1 sq ft)
Evaporative heating area	96.43 m2 (1,038.0 sq ft)

Twenty two of these locomotives were taken over by the Deutsche Reichsbahn, where they were given the running numbers 34 7301–34 7308 and 34 7351–34 7364. These engines were exclusively vehicles from the Friedrich-Franz Railway.

The engines were equipped with Prussian tenders of Class pr 3 T 10.5.

Liesel 22-10-2010 pr. P 3.1 2No. 246