Mecklenburg P 3.1

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Mecklenburg VI Mecklenburg P 3.1 DRG Class 34.73
Prussian P 3.1 No. 323 of the Magdeburg Division
Type and origin Builder Henschel & Sohn Linke-Hofmann Werke Build date 1888–1907 Total produced 41
Specifications Configuration: ​  • Whyte 2-4-0 Gauge 1,435 mm (4 ft 8+1⁄2 in) Leading dia. 1,150 mm (3 ft 9+1⁄4 in) Driver dia. 1,750 mm (5 ft 9 in) Length: ​  • Over beams 14,793 mm (48 ft 6+1⁄2 in) Axle load 12.35 tonnes (12.15 long tons; 13.61 short tons) Adhesive weight 24.70 tonnes (24.31 long tons; 27.23 short tons) Service weight 36.52 tonnes (35.94 long tons; 40.26 short tons) Boiler pressure 12 kgf/cm2 (1,180 kPa; 171 lbf/in2) Heating surface: ​  • Firebox 1.87 m2 (20.1 sq ft)  • Evaporative 96.43 m2 (1,038.0 sq ft) Cylinder size 400 mm (15+3⁄4 in) Piston stroke 560 mm (22+1⁄16 in)
Performance figures Maximum speed 90 km/h (56 mph)
Career Numbers MFFE: 101–141 DRG: 34 7301 – 34 7308, 34 7351 – 34 7364

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.

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.

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

• Pierson, Kurt (1981). Die Preußischen Dampflokomotiven 1850–1922 (in German). Stuttgart: Motorbuch Verlag. ISBN 3-87943-813-7.^{[page needed]}
• 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.^{[page needed]}
• Weisbrod, Manfred; Müller, Hans; Petznik, Wolfgang (1976). Dampflokomotiven deutscher Eisenbahnen, Baureihe 01–39 (EFA 1.1) (in German) (3rd ed.). Düsseldorf: Alba Buchverlag. pp. 191–192. ISBN 3-87094-081-6.