DRG H 02 1001

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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[]

• List of DRG locomotives and railcars

References[]

External links[]

• "High Pressure Steam Engine Halves Fuel Costs". Popular Mechanics: 593. October 1930.

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