Mecklenburg XIX

The locomotives of Class XIX of the Grand Duchy of Mecklenburg Friedrich-Franz Railway were deployed on the Bad Doberan–Heiligendamm narrow-gauge. The triple-coupled engines were classified as T 7 locomotives in 1910. In 1911 they were transferred to the Neubukow Beet Railway.

Mecklenburg XIX Mecklenburg T7
Number(s)	MFFE: 1003 and 1004
Quantity	2
Manufacturer	Krauss
Year(s) of manufacture	1891, 1898
Retired	1923, 1924
Wheel arrangement	0-6-0T
Axle arrangement	C n2t
Track gauge	900 mm (2 ft 11 ^7⁄16 in)
Length over buffers	5,530 mm (18 ft 1 ^3⁄4 in)
Height	3,705 mm (12 ft 1 ^7⁄8 in)
Overall wheelbase	1,800 mm (5 ft 10 ^3⁄4 in)
Empty weight	13.08 t (12.87 long tons; 14.42 short tons)
Service weight	15.98 t (15.73 long tons; 17.61 short tons)
Adhesive weight	15.98 t (15.73 long tons; 17.61 short tons)
Axle load	5.33 t (5.25 long tons; 5.88 short tons)
Top speed	31 km/h (19 mph)
Coupled wheel diameter	700 mm (2 ft 3 ^1⁄2 in)
No. of cylinders	2
Cylinder bore	260 mm (10 ^1⁄4 in)
Piston stroke	400 mm (15 ^3⁄4 in)
Boiler Overpressure	12 kgf/cm^2 (1,180 kPa; 171 lbf/in^2)
No. of heating tubes	88
Heating tube length	2,200 mm (7 ft 2 ^1⁄2 in)
Grate area	0.43 m^2 (4.6 sq ft)
Radiative heating area	2.17 m^2 (23.4 sq ft)
Tube heating area	26.76 m^2 (288.0 sq ft)
Evaporative heating area	28.93 m^2 (311.4 sq ft)
Water capacity	1.70 m^3 (370 imp gal; 450 US gal)
Fuel	750 kg (1,650 lb)
Locomotive brakes	Hand brake, Knorr air brakes

History

The Class XVIII locomotives were soon unable to cope with the increase in traffic. As a result, a triple-coupled engine was ordered from Krauss in Munich. The locomotive was given the number 1003 by the Mecklenburg State Railway and was incorporated into Class XIX. In 1898 another locomotive, number 1004, followed. In 1910 the line was extended as far as Arendsee. To handle the higher levels of traffic, three similar engines were ordered from Henschel. With the introduction into service of these locomotives, that were grouped into Class T 7, the two Krauss locomotives were given to the Neubukow Beet Railway. The engines were still listed in the first Deutsche Reichsbahn renumbering plan in 1923, but they were retired by 1924.

Design features

The locomotives had an inside frame which was built as a water tank. The boiler comprised two shell rings. The steam dome with its safety valve sat on the forward shell ring. The smokebox was very short. The smokestack has a Kobel spark arrestor. Later a Prüsmann chimney was used.

The horizontally arranged two-cylinder, wet steam drive acted on the rearmost coupled axle. The Stephenson valve gear with crossed eccentric rods was also on the outside.

The two front coupled axles had leaf spring blocks at the height of the running plate. These were linked by equalising beams. The rear axle was sprung with a transverse leaf spring stack.

The hand brake acted on the two outside wheel sets from the outside. Later the locomotives were given Knorr air brakes. The sanding gear sat on the middle of the boiler and sanded the outer sets of wheels from the outside. To begin with the running gear was covered. The locomotives also had steam heating, a steam bell and a De Limon centralized lubricating system.

References

• Kirsche, Hans-Joachim; Lohr, Hermann; Thielmann, Georg (1989). Lokomotiv-Archiv Mecklenburg/Oldenburg. Berlin: transpress. ISBN 3-344-00326-7.CS1 maint: ref=harv (link)