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 VI Mecklenburg P 3.1 DRG Class 34.73
Prussian P 3.1 No. 323 of the Magdeburg Division
Number(s)	MFFE: 101–141 DRG: 34 7301 – 34 7308, 34 7351 – 34 7364
Quantity	41
Manufacturer	Henschel & Sohn Linke-Hofmann Werke
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 ^1⁄2 in)
Service weight	36.52 tonnes (35.94 long tons; 40.26 short tons)
Adhesive weight	24.70 tonnes (24.31 long tons; 27.23 short tons)
Axle load	12.35 tonnes (12.15 long tons; 13.61 short tons)
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 ^1⁄4 in)
Cylinder bore	400 mm (15 ^3⁄4 in)
Piston stroke	560 mm (22 ^1⁄16 in)
Boiler Overpressure	12 kgf/cm^2 (1,180 kPa; 171 lbf/in^2)
Grate area	1.87 m^2 (20.1 sq ft)
Evaporative heating area	96.43 m^2 (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

See also

• Grand Duchy of Mecklenburg Friedrich-Franz Railway
• List of Mecklenburg locomotives

Sources

• Wagner; Bäzold; Zschech; Lüderitz (1990). Lokomotiven preußischer Eisenbahnen - Schnellzug und Personenzuglokomotiven. Eisenbahn-Fahrzeug-Archiv Band 2.3.1 (in German). Berlin: transpress. ISBN 3-87094-133-2.
• Pierson, Kurt (1981). Die Preußischen Dampflokomotiven 1850–1922 (in German). Stuttgart: Motorbuch Verlag. ISBN 3-87943-813-7.