Bavarian AA I - Misplaced Pages

(Redirected from Bavarian P 2/4) Steam locomotive built in 1896

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Bavarian AA I
later P 2/4
DRG Class 36.8

Type and origin
Builder	Krauss
Build date	1896
Total produced	1

Specifications
Configuration:
• Whyte	4-2-2-2, later 4-4-0
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Leading dia.	1,006 mm (3 ft 3+5⁄8 in)
Driver dia.	1,870 mm (6 ft 1+5⁄8 in)
Length:
• Over beams	16,570 mm (54 ft 4+1⁄4 in)
Axle load	14.9 t (14.7 long tons; 16.4 short tons)
Adhesive weight	29.8 t (29.3 long tons; 32.8 short tons)
Service weight	51.7 t (50.9 long tons; 57.0 short tons)
Water cap.	14.5 m (3,200 imp gal; 3,800 US gal)
Boiler pressure	13 kgf/cm (1.27 MPa; 185 lbf/in)
Heating surface:
• Firebox	2.26 m (24.3 sq ft)
• Evaporative	94.60 m (1,018.3 sq ft)
Superheater:
• Heating area	26.85 m (289.0 sq ft)
Cylinders	2
Cylinder size	490 mm (19+5⁄16 in)
Piston stroke	610 mm (24 in)

Performance figures
Maximum speed	90 km/h (56 mph)

Career
Numbers	K.Bay.Sts.E.: 1400 DRG: 36 861
Retired	1933

The only AA I steam locomotive of the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn) was built by the firm of Krauss in 1896. It had been designed by chief mechanical engineer, Richard von Helmholtz, as a 4-2-2-2 tender locomotive. The engine was largely based on the Bavarian B XI, but the driving and running gear was modified. The second coupled axle was replaced by a fixed carrying axle, and a dolly axle (Vorspannachse) added between the bogie and driving axle. This could be lowered by a pressure cylinder and was driven by an auxiliary engine with two cylinders. Despite her high maintenance requirement, she was economical to run due to her low steam consumption. In 1907 she was rebuilt after an accident into a 2'B h2 locomotive and redesignated as a Class P 2/4. She was taken over by the Deutsche Reichsbahn and run under operating number 36 861. She was the last Bavarian 4-4-0 locomotive to be retired in 1933.

The engine was equipped with a Bavarian 3 T 14.5 tender.

References

Obermayer, Horst J. (1990). "Dampflokomotiven". Deutsche Eisenbahnen (in German). Stuttgart: Franckh-Kosmos Verlag. p. 87. ISBN 3-89350-819-8.
Weisbrod, Manfred; Müller, Hans; Petznik, Wolfgang (1976). Dampflokomotiven deutscher Eisenbahnen, Baureihe 01–39 (EFA 1.1) (in German) (3rd ed.). Düsseldorf: Alba Buchverlag. pp. 208–210. ISBN 3-87094-081-6.

v t e Classes of Bavarian locomotive and railcars
Early locomotives	Adler Jupiter and Juno Vesta and Venus Vulkan and Mars Merkur and Diana A I A II A III A IV A V B I B II B III B IV B V B V (artic) C I C II
Passenger and express train locomotives	B VI B VII B VIII B IX (old) B IX B X B XI Zw B XI Vbd C V AA I S 2/5 (Vauclain) S 2/5 S 2/6 S 3/5 N S 3/5 H S 3/6 P 2/4 P 3/5 N P 3/5 H
Goods train locomotives	C II C III C IV Zw C IV Vbd C VI E I E I (Vauclain) BB I G 3/4 N G 3/4 H G 4/5 N G 4/5 H G 5/5
Tank locomotives	D I D II D II (old) D III D IV D V D IX D XII Pt 2/3 Pt 2/4 N Pt 2/4 H Pt 2/5 N Pt 2/5H Pt 3/6 Gt 2×4/4 R 3/3 R 4/4
Branch line locomotives	D VI D VII D VIII D X D XI BB II PtL 2/2 (Maffei) PtL 2/2 (Krauss) PtL 3/3 PtL 3/4 PtzL 3/4 GtL 4/4 (GtL 4/5 - DRG 98.10) (GtL 4/5 - DRG 98.11)
Narrow gauge locomotives	LE Pts 3/4 Gts 4/4 Gts 2x3/3
Electric locomotives	ES 1 EP 1 EP 2 EP 3 EP 4 EP 5 EG 1 EG 2 EG 3 (EG 4) (EG 5)
Railbuses	Krauss railmotor MCi MBCi MCCi MBCL MPL D4ieIT (D4ieIT variant - DRG ET 85)
Bavarian Ostbahn locomotives	A 1 – A 12 A 13 – A 24 A 1 – A 2 B 1 – B 66 B 67 – B 78 B 79 – B 90 B 91 – B 96 B 97 – B 109 C 1 – C 12 C 13 – C 64 D 1 – D 12 D 13 – D 14
Royal Bavarian State Railways

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References