Tr102

 

 

Probably a factory photo of the prototype G 4/5 N 2131, built in 1905. Later this engine became DRG 56 401 and was withdrawn in 1927. Source: Lokomotiv-Archiv Bayern (see References).

 

 

Side drawing of class G 4/5 N; source: as above.

 

 

 

 

 

 

In 1906 Krauss company of Munich exhibited at the Bayerischen Jubiläums-Landesaustellung a new 1-4-0 freight locomotive, running on saturated steam and fitted with single-expansion engine. Being assigned for this occasion a ‘round’ factory number 5000/1905, it was in fact developed from the company’s earlier class E I Normalbauart neuere Ausführung, of which 48 examples had been built. It differed mainly in enlarged boiler with 260 flues instead of 229, total evaporation heating surface being increased by about 12 percent. With 1270 mm drivers, maximum speed was increased from 50 to 60 km/h. Königlich Bayerischen Staatsbahn (K.Bay.Sts.B) ordered this engine in quantity, but only six production examples followed, as steam superheating had already shown its advantages. In accordance with new designation system, they were classed G 4/5 N. G for Güterzuglokomotive, or freighter, N for Naßdampf, or saturated steam; 5 indicated total number of axles and 4 – number of coupled axles. It may be noted that G 4/5 H was a completely different four-cylinder engine. Seven G 4/5 Ns were given service numbers 2131 through 2137.

After the war 2135 (Krauss 5336/1906) was taken over by Romanian state railways CFR, retaining its original service number. Four examples were kept by newly-formed DRG, but only for a short time, last two being withdrawn in 1929. Two remaining locomotives, 2134 (Krauss 5335/1906) and 2137 (Krauss 5338/1906) were taken over by PKP and classed Tr102. It is not clear which service number went to which particular example and confusion with the sole Tr101 (ex E I) cannot be excluded. Both Tr102s were still in use in 1927, but were written off before 1936. No engine of this type has survived until today.

 

Main technical data

 

No.

Parameter

Unit

Value

1.

Years of manufacture

-

1905 – 1906

2.

Total built / used in Poland

-

7 / 2

3.

Tender class

-

4.

Axle arrangement

-

1-4-0

5.

Design maximum speed

km/h

60

6.

Cylinder bore

mm

2 X 540

7.

Piston stroke

mm

610

8.

Engine rating

kW/hp

9.

Tractive effort

kG

10.

Boiler pressure

MPa

1.22

11.

Grate dimensions

m X m

2.9 m2

12.

Firebox heating surface

m2

10.7 m2

13.

Distance between tube plates

mm

4 500

14.

Number of flue tubes

-

229

15.

Heating surface of flue tubes

m2

169.0

16.

Number of smoke tubes

-

-

17.

Heating surface of smoke tubes

m2

-

18.

Evaporating surface, total

m2

179.7

19.

Superheater heating surface

m2

-

20.

Diameter of drivers

mm

1270

21.

Diameter of idlers front/rear

mm

1006 / -

22.

Total weight, empty

kg

23.

Total weight, working order

kg

64 800

24.

Weight on drivers, working order

kg

55 900

25.

Weight with tender, empty

kg

26.

Weight with tender, working order

kg

27.

Maximum axle load

T

14.0

28.

Axle base (with tender)

mm

15 489

29.

Overall length (with tender)

mm

18 354

30.

Brake type

-

 

 

References and acknowledgments

 

-       www.beitraege.lokomotive.de (website by Ingo Hütter);

-       www.de.wikipedia.org; 

-       LP;

-       Lokomotiv-Archiv Bayern by Heinz Schnabel (Transpress, 1987);

-       Charakterystyka parowozów (Steam Locomotive Characteristics) by A.Czeczott (Ministry of Transport, 1927).