Mecklenburg P 4.2

4 ft 8+1⁄2 in)Leading dia.1,000 mm (3 ft 3+1⁄4 in)Driver dia.1,750 mm (5 ft 9 in)Length:
​ • Over beams17,645 mm (57 ft 10+3⁄4 in)Axle load14.9 tonnes (14.7 long tons; 16.4 short tons)Adhesive weight19.6 tonnes (19.3 long tons; 21.6 short tons)Service weight50.4 tonnes (49.6 long tons; 55.6 short tons)Water cap.12.0 or 16.0 m³ (2,600 or 3,500 imp gal; 3,200 or 4,200 US gal)Heating surface:​ • Firebox2.31 m² (24.9 sq ft) • Evaporative118.85 m² (1,279.3 sq ft)Cylinders2, compoundHigh-pressure cylinder460 mm (18+1⁄8 in)Low-pressure cylinder680 mm (26+3⁄4 in)Piston stroke600 mm (23+5⁄8 in)

Performance figures
Maximum speed	90 km/h (56 mph)
Indicated power	580 PS (427 kW; 572 hp)

Career
Numbers	MFFE: 201–231 DRG: 36 602 – 36 620, 36 651 – 36 662
Retired	by 1931

The Mecklenburg Class P 4.2, formerly Class VII, were early German steam locomotives operated by the Grand Duchy of Mecklenburg Friedrich-Franz Railway and were used specifically for hauling express trains on the line from Warnemünde to Berlin. They were mechanically identical with the Prussian P 4.2. All 31 units were taken over by the Deutsche Reichsbahn who incorporated them as Class 36.6 with numbers 36 602–620 and 651–662. The first series of numbers were engines with a 14 t axle load, the second those with a 15 t axle load. In 1931 the last locomotive of this class was retired.

No. 36 601 was a Prussian P 4.2 that was redeployed to Mecklenburg in 1920.

Apart from three units, these engines were equipped with Class 2'2' T 16 tenders.

References

• Spielhoff, Lothar (1990). Länderbahn-Dampf-Lokomotiven. Band 1: Preußen, Mecklenburg, Oldenburg, Sachsen und Elsaß-Lothringen (in German). Stuttgart: Franckh'sche Verlagshandlung. ISBN 3-440-06145-0.^{[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. 203–205. ISBN 3-87094-081-6.