Class M 801 - 803
Manufacturer :
 Krauss
Locomotive Arrangement :
 B'Bh4v + 2T
Year :
 1908
Cylinder Bore (mm) :
 340 H.P. / 540 L.P.
Cylinder Stroke (mm) :
 540
Driving Wheel Diameter (mm) :
 1100
Leading Wheel Diameter (mm) :
 -
Wheelbase (mm) :
 6300
Boiler Pressure (atm) :
 10
Without a doubt this is one of the most interesting locomotive
classes, ever in Hellas. They were built by Krauss in Munich. The
first interesting characteristic is that they were the only mallets that
worked in a first class network in Hellas. As the mallet type dictates,
the locomotives were four cylinder compounds (only one other
class in the history of the Hellenic Railways was a four cylinder
compound and worked on the standard gauge network), with one
set of high pressure (H.P.) and one set of low pressure (L.P.) cyli-
nders. Some sources refer to them as saturated steam locomotives.
This is not actually true as the manufacturers photographs reveal
us that they used superheated steam (Patent Wilhelm Schmidt).
Another feature that is worth noting is the relatively small tender in
contrast to the locomotive. About their service, we know little. The
only thing that we know from witnesses is that they used to do pas-
senger services on the steep Tripolis line. Today none of the three
locomotives exists, because they were destroyed during the retreat
of the German troops in 1944.
Grate Area (m2) :
 1,51
Heating Surface (m2) :
 106,9
Superheater Surface (m2) :
 ?
Empty Weight (t) :
 44,85
Weight in Working Order (t) :
 57,1 (locomotive + tender)
Adhesion Weight (t) :
 40,0
Tender Characteristics :
 2 axle
Water Supply (m3) :
 6,0
Fuel (t) :
 3,0
Maximum Speed (km/h) :
 -