DRG H 02 1001

H 02 1001
Quantity 1
Manufacturer BMAG
Year(s) of manufacture 1929/1930
Retired 1945
Axle arrangement 2′C1′ h3v
Track gauge 1,435 mm (4 ft 8 1⁄2 in)
Length over buffers 23.750 m (77 ft 11 in)
Minimum curve 140 m (460 ft)
Empty weight 111.5 tonnes (109.7 long tons; 122.9 short tons)
Service weight 115 tonnes (113 long tons; 127 short tons)
Adhesive weight 60 tonnes (59 long tons; 66 short tons)
Top speed 110 km/h (68 mph)
Indicated Power 2,600 PS (1,910 kW; 2,560 hp)
Driving wheel diameter 2,000 mm (6 ft 6 3⁄4 in)
Leading wheel diameter 1,250 mm (4 ft 1 1⁄4 in)
Trailing wheel diameter 850 mm (2 ft 9 1⁄2 in)
No. of cylinders 3
LP cylinder bore 220 mm (8 11⁄16 in)
HP cylinder bore 600 mm (23 5⁄8 in)
Piston stroke 660 mm (26 in)
Boiler Overpressure 120 bar (12.0 MPa; 1,740 psi)
Grate area 2.4 m2 (26 sq ft)
Tender 2′2′T 32
Water capacity 32,000 litres (7,000 imp gal; 8,500 US gal)

The DRG H 02 1001 was a remarkable high-pressure steam locomotive, built by the engineering firm of Schwarzkopff to the design of Dr L. Löffler.[1] The aim was not only to improve fuel economy—the usual reason for adopting high steam pressures—but also to increase the amount of power that could be produced within the German loading gauge.

The H02 1001 locomotive was the only example of the Schwarzkopff-Löffler high-pressure boiler system, a complex technology in which heat was extracted from the firebox by tubes filled with steam rather than boiling water. It was delivered in 1930 to the Deutsche Reichsbahn (DRG). Schwarzkopff guaranteed in the purchase contract a coal saving of 42% over a standard 01 locomotive design, but in the event the DRG never bought the locomotive.

Steam was delivered at no less than 1,750 lbf/in2 (123 kgf/cm2; 12.1 MPa) to two very small outside cylinders of 220 mm (8 11⁄16 in) diameter. These were compounded with a single 600 mm (23 5⁄8 in) LP inside cylinder. The wheel arrangement was 4-6-2.

After extensive trials it was found that any increase in efficiency was small compared with the greatly increased maintenance costs. The very complicated H02 1001 was also hopelessly unreliable.

See also

References

  1. ↑ "H02". Hochdruck: German High-Pressure Locomotives. Retrieved 24 May 2010.
  • "High Pressure Steam Engine Halves Fuel Costs". Popular Mechanics: 593. October 1930.
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