Bavarian ML 2/2

Infobox German Railway Vehicle
Baureihe= Bavarian ML 2/2
Farbe1= 0081FF
Farbe2= FFFFFF
Abbildung= ML2 2.jpg
Name= H0 model of a ML 2/2
Nummerierung= 4001–4024
DRG 98 361–384 (planned)
Hersteller= Maffei
Baujahre= 1906–1908
Ausmusterung= 1924
Anzahl= 24
Achsformel=
Wheel arrangement=0-4-0
Bauart= B h2t (opposed pistons)
Gattung=
Spurweite= 1,435 mm
Treibraddurchmesser= 990 mm
VorneLaufraddurchmesser=
HintenLaufraddurchmesser=
AussenLaufraddurchmesser=
InnenLaufraddurchmesser=
Laufraddurchmesser=
Anfahrzugkraft=
Beschleunigung=
Leistungskennziffer=
Höchstgeschwindigkeit= 50 km/h
LängeÜberKupplung=
LängeÜberPuffer= 6,570 mm
Länge=
Höhe=
Breite=
Drehzapfenabstand=
AchsabstandDerFahrgestelle=
FesterRadstand=
Gesamtradstand=
RadstandMitTender=
Leermasse=
Dienstmasse= 22.0 t
DienstmasseMitTender=
Reibungsmasse= 22.0 t
Radsatzfahrmasse= 11.0 t
Antrieb=
Geschwindigkeitsmesser=
Steuerung=
Übersetzungsstufen=
Kupplungstyp=
Bremsen=
Zusatzbremse=
Feststellbremse=
Zugheizung=
Lokbremse= Compressed air brakes
Zugbremse=
Zugsicherung=
Halbmesser=
Besonderheiten=
Anmerkung=
Zylinderanzahl= 2
Zylinderdurchmesser= 265 mm
NDZylinderdurchmesser=
HDZylinderdurchmesser=
Kolbenhub= 280 mm
Kuppelraddurchmesser=
Kessel=
Kessellänge=
Kesseldruck= 12 bar
AnzahlHeizrohre=
AnzahlRauchrohre=
Heizrohrlänge=
Rostfläche= 0.83 m²
Strahlungsheizfläche=
Rohrheizfläche=
Überhitzerfläche=
Verdampfungsheizfläche= 35.50/42.00 m²
IndizierteLeistung= 145 kW
Steuerungsart=
Zylinderdruck=
Tenderbauart=
DienstmasseTender=
Wasser=
Brennstoff= The Class ML 2/2 locomotives of the Royal Bavarian State Railways ("Königlich Bayerische Staatsbahn") were light and very compact superheated steam locomotives designed for services on branch lines ("Lokalbahnen"). They were a rival design by Maffei to the Bavarian PtL 2/2 or "Glaskasten" locomotives built by Krauss. In common with the Krauss engines the ML 2/2 had the axle arrangement B, semi-automatic gravity firing that enabled one-man operation, and gangways with railings, front and rear, that allowed safe transit to the coaches. The valve gear was however a completely different affair. These locomotives had two external cylinders each with opposing pistons that were arranged between the two axles. The axles were linked via connecting rods on the inside.

In 1906 Maffei delivered the first three locomotives (railway numbers 4001–4003). In spite of the unusual, and for a two-cylinder locomotive, extremely complicated gear system, the engines proved themselves, and Maffei supplied another 21 examples up to 1908 (Nos. 4004 - 4024). The positive experience with these locomotives also led to the construction of the Class MCCi steam railbus, whose driven bogie and boiler were very similar to those of the ML 2/2.

Three locomotives were sold to the United Fireclay Factories ("Vereinigten Schamottefabriken") in Marktredwitz in 1922. The remaining machines were all including in the Reichsbahn's 1923 renumbering plan as 98 361-384; however they were retired by 1924. The reason was the complicated and maintenance-intensive driving gear.

External links

* [http://de.geocities.com/laenderbahnen/raimo/200040.jpgModel of a ML 2/2, No. 4004]
* There is a relevant English-language forum at [http://germanrail.8.forumer.com/index.php Railways of Germany]