DR series 99.22
| DR series 99.22 | |
|---|---|
 99 222 on the Brocken
|
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| Numbering: | 99 221-223 |
| Number: | 3 |
| Manufacturer: | BMAG , Berlin |
| Year of construction (s): | 1931 |
| Retirement: | from 1945 (war loss) |
| Type : | 1'E1 'h2t |
| Genre : | K 57.10 |
| Gauge : | 1000 mm ( meter gauge ) |
| Length over buffers: | 11,636 mm |
| Height: | 3650 mm |
| Width: | 2550 mm |
| Fixed wheelbase: | 4800 mm |
| Total wheelbase: | 8700 mm |
| Smallest bef. Radius: | 50 m |
| Empty mass: | 50.2 t |
| Service mass: | 65.8 t |
| Friction mass: | 50.5 t |
| Top speed: | 40 km / h |
| Indexed performance : | 650 to 700 PSi |
| Starting tractive effort: | 102.97 kN |
| Coupling wheel diameter: | 1000 mm |
| Driving wheel diameter: | 1000 mm |
| Impeller diameter: | 550 mm |
| Control type : | Heusinger |
| Number of cylinders: | 2 |
| Cylinder diameter: | 500 mm |
| Piston stroke: | 500 mm |
| Boiler overpressure: | 14 bar |
| Number of heating pipes: | 114 |
| Number of smoke tubes: | 32 |
| Heating pipe length: | 3500 mm |
| Grate area: | 1.78 m² |
| Radiant heating surface: | 7.7 m² |
| Superheater area : | 33.3 m² |
| Evaporation heating surface: | 95.9 m² |
| Water supply: | 8 m³ |
| Fuel supply: | 3 tons of coal |
| Locomotive brake: | air brake controlled by suction air * |
| Train brake: | originally KP mZ and driver's brake valve type grinder. Hardy suction air brake with additional brake . * KE-P mZ ** |
| Coupling type: | Janney coupling , now a balancing lever coupling |
| Particularities: | * from 1967 ** from 1985 |
The 99.22 series is a series of narrow-gauge standard steam locomotives of the Deutsche Reichsbahn for 1000 mm gauge .
history
The locomotives of the 99.22 series were intended to replace older Prussian locomotives, particularly in the area of the Reichsbahndirektion Erfurt, but also on Bavarian, Baden and Württemberg routes. But only three locomotives that are on the in were ultimately built Thuringia nearby narrow-gauge railway Eisfeld-Schönbrunn began. The three built machines of the series were given the Reichsbahn operating numbers 99 221–99 223.
The locomotives 99 221 and 99 223 were brought to Norway during the Second World War in 1944 and were used on the actually electrically operated Thamshavnbane . When electrical operation on the Thamshavn – Løkken Verk line could be fully resumed after the Second World War, the two locomotives were superfluous and were scrapped by 1953.
Locomotive 99 222, on the other hand, remained in service on its Thuringian main line until 1966 and was then ordered by the Deutsche Reichsbahn into the Harz Mountains. With the introduction of the EDP numbers in 1970, the machine was given the road number 99 7222, which it still bears today. It is now part of the operational vehicle fleet of the Harzer Schmalspurbahnen (HSB).
After an accident on August 21, 1994 in Thumkuhlental, the locomotive stayed at the Meiningen repair shop and was given back the original Knorr surface preheater as part of the refurbishment, after having had a mixer preheater like the new locomotives for years.
On the basis of the standard locomotive design, the new class 99.23 locomotives were built in Babelsberg from 1953 . Clearly visible differences between the new locomotives and the standard locomotives are the completely lockable driver's cab doors and the welded sheet metal frame. The handwheel of the central lock of the smoke chamber door on the 99 222 is only a dummy.
In the summer of 2016, serious damage was found to the original frame of the locomotive. In September 2016 the locomotive was brought to the Meiningen steam locomotive works and repaired. For economic reasons, the HSB immediately had a general inspection (HU) carried out, which is due every eight years. On February 7, 2017, the machine arrived in Wernigerode again. She was brought to the workshop. After a few days it was under steam again. It is currently being used again from Wernigerode. The boiler inspection is due in four years.
Technical characteristics and capabilities
The strongest German narrow-gauge locomotives of their time were, like most standard locomotives, equipped with a bar frame (cheek thickness: 60 mm).
The running gear, made up of five coupled wheel sets and one leading and one trailing wheel set, is designed with four-point support, the suspension of the three front and four rear wheel sets were connected with compensating levers. The wheel sets were designed as Bissel frames .
A special feature during the service on the Eisfeld – Schönbrunn line was the Janney type automatic central buffer coupling . After the conversion to the Harzquerbahn , the 99 222 was converted to the balancing lever coupling common there . This conversion can still be seen clearly from the cutouts in the frame end plates.
The riveted boiler corresponded to the boiler of the standard gauge series 81 except for changes to the smoke chamber and the domes . In the meantime it has been replaced by welded constructions during two main inspections in stages at the Meiningen steam locomotive works. First the rear boiler section was replaced, then in April 2013 the front boiler section, which had been riveted until then. A steam jet pump and a piston feed pump with an exhaust steam preheater of the Knorr type (surface preheater) were added to feed the boiler; In 1973, the preserved locomotive received a mixer preheater instead of the Knorr preheater. This was again exchanged for a surface preheater in 1999.
The two-cylinder superheated steam engine with simple steam expansion was carried out with a drive on the third coupled gear set. In the interest of equally good steam distribution, the Heusinger control received Kuhnian loops when driving forwards and backwards . The angle valve pressure equalizers originally attached were exchanged for Trofimoff type pressure equalizing piston valves on locomotive 99 222 as early as 1950 .
The locomotives of the series were able to move a train mass of around 1000 to 1100 t at 40 km / h on the plain. On gradients of ten per mille they managed 145 t at the same speed in curved tracks with a radius of only 60 m, and on gradients of 25 per mille in a radius of curvature of 60 m as well as 195 t at 20 km / h.
Picture gallery
Wernigerode coaling plant
Heater side
Nameplate of 99 222
Locomotive signs for 99 222
With mixer preheater (1994)
Locomotive list
- 99 221 last place of work: Thamshavnbanen ( Norway ) - scrapped in 1953
- 99 222 in use at HSB
- 99 223 last place of use: Thamshavnbanen - scrapped in 1947
literature
- Manfred Weisbrod, Hans Wiegard, Hans Müller, Wolfgang Petznick: German Locomotive Archive: Steam Locomotives 4 (Class 99) . transpress, Berlin 1995, ISBN 3-344-70903-8 , pp. 49-53, 244 .
