Bavarian S 2/6 Bavarian S 2/6 in the Nuremberg Transport Museum
Type and origin Builder Maffei Build date 1906 Total produced 1
Specifications Configuration: • Whyte 4-4-4 Gauge 1,435 mm (4 ft 8+ 1 ⁄2 in )Leading dia. 3+ 5 ⁄8 in)Driver dia.2+ 5 ⁄8 in)Trailing dia. 3+ 5 ⁄8 in)Length: • Over beams 21,182 mm (69 ft 6 in) Axle load 16.0 t (15.7 long tons; 17.6 short tons) Adhesive weight 32.0 t (31.5 long tons; 35.3 short tons) Service weight 83.4 t (82.1 long tons; 91.9 short tons) Boiler pressure 15 kgf/cm2 (1.47 MPa; 213 lbf/in2 ) Heating surface: • Firebox 4.71 m2 (50.7 sq ft) • Evaporative 214.50 m2 (2,308.9 sq ft) Superheater: • Heating area 38.00 m2 (409.0 sq ft) Cylinders 4 (von Borries compound , 2×HP, 2×LP High-pressure cylinder 16+ 1 ⁄8 in)Low-pressure cylinder 610 mm (24 in) Piston stroke 25+ 3 ⁄16 in)
Performance figures Maximum speed 154.5 km/h (96 mph) Indicated power ≈2,200 PS (1,620 kW; 2,170 hp)
Career Numbers K.Bay.Sts.E.: 3201 Retired 1925
Restored 1925 by Maffei, current owner: Nuremberg Transport Museum
Driving gear of the S 2/6Crank axle of the S 2/6The Royal Bavarian State Railways ' sole class S 2/6 steam locomotive was built in 1906 by the firm of Maffei in Munich , Germany . It was of 4-4-4 wheel arrangement in the Whyte notation , or 2'B2' h4v in the UIC classification scheme, and was a 4-cylinder, von Borries , balanced compound locomotive . It was initially assigned No. 3201.
The inspiration was partly the two Prussian S 9 cab forward 4-4-4s of two years previously. Unlike those locomotives, the S 2/6 was strictly conventional in all respects apart from wheel arrangement, driving wheel size and streamlining. Many aspects of the design were borrowed from the earlier Maffei design of the Baden IId 4-4-2 class; Anton Hammel was the chief designer for both. The locomotive was designed and built in only 4 months.
