LAW D21
| LAW D 21 | |
|---|---|
| Numbering: | LAW D21 |
| Number: | 1 |
| Manufacturer: | Originally KHD conversion of the LAW workshop |
| Year of construction (s): | 1941 |
| Retirement: | 1972 |
| Type : | originally B dm after conversion C dm |
| Gauge : | 1000 mm ( meter gauge ) |
| Length over coupling: | originally 5,300 mm after conversion 6,310 mm |
| Length: | originally 4,000 mm after conversion 4,900 mm |
| Height: | originally 2,340 mm after modification 2,770 mm |
| Width: | originally 1,580 mm after renovation 2,200 mm |
| Total wheelbase: | originally 1,300 mm after renovation 2,500 mm |
| Service mass: | originally 12,000 kg after conversion 13,000 kg |
| Friction mass: | originally 12,000 kg after conversion 13,000 kg |
| Wheel set mass : | originally 6,000 kg after conversion 4,300 kg |
| Top speed: | 18 km / h |
| Installed capacity: | originally 55 kW (75 PS) after conversion 66 kW (90 PS) |
| Driving wheel diameter: | 550 mm |
| Motor type: | Originally KHD A3M420 F after conversion DB 204 A |
| Motor type: | Originally a three-cylinder four-stroke diesel engine after the conversion of a four-cylinder four-stroke diesel engine |
| Rated speed: | originally unknown after modification 1,000 / min |
| Power transmission: | mechanically |
| Brake: |
Air brake hand brake |
The diesel locomotive with pinion drive LAW D 21 of the free path empty Aurich-Witt mouth (LAW) was originally a biaxial diesel locomotive from the standard program A3M 420 F by KHD and was converted from the workshop of the LAW in a three-axle locomotive. The vehicle was in service from 1953 to 1967 and was scrapped in 1972.
history
The locomotive was delivered as a two-axle locomotive to the naval construction authority in Helgoland in 1941 and corresponded to a standard type from KHD for works railways , which was rarely built for meter gauge .
After LAW had acquired a locomotive of the same design as the D 23 delivered to the Wilhelmshaven naval shipyard in 1941 in 1951, it bought another locomotive in 1953 as a replacement for steam locomotives and designated it as the D 21.
Both locomotives were equipped with an air brake. The D 21 received a Daimler-Benz engine in 1953 , the D 23 only in 1956.
While the D 23 became a spare parts donor in 1959 after an engine failure, the D 21 was rebuilt again in 1960 in order to be able to transport jacked up standard gauge vehicles .
technical description
Original version
Originally the two-axle standard locomotives had a rod drive and mechanical power transmission. The jackshaft lay between the axles. The locomotive could be recognized as a Deutz locomotive by the round windows.
The drive system consisted of a three-cylinder four-stroke diesel engine from KHD and a mechanical four-speed gearbox.
Conversion execution
The frame also had to be stiffened for equipping it with regular pulling and bumpers . The driver's cab was lengthened and widened for this. In order not to increase the permitted weight due to the overhang, a third axle was installed under the driver's cab, which at the same time reduced the axle load of the locomotive. The center axle was later weakened in the flange so that the locomotive could be used in shunting operations at train stations.
A new four-cylinder four-stroke diesel engine from Daimler-Benz with a higher output was installed as the machine system for the locomotive.
commitment
At first, the locomotive could only be used to a limited extent in general traffic due to its low speed and power. At the beginning, it was used for bathing traffic from Esens to Bensersiel and as a shunting locomotive in Esens.
After the rebuilding from 1962, the locomotive could no longer be used on the line. Attempts were made to sell the locomotive until 1966. After the wheel flange was weakened, it was only used as a shunting locomotive in Esens. After the entire line was closed, it was placed in the Aurich train station and scrapped in 1972.
literature
- Hinrich Rudolfsen, Wolf-Jobst Siedler: The Leer-Aurich-Wittmund small train . Kenning Verlag, Nordhorn 1997, ISBN 3-927587-46-X , p. 114-116 .
Web links
- Website about a model railway layout of the LAW D21 on www.muenster.de
- Website about the Deutz locomotives with mention of the A3M220 F on www.lokmacher.de
- Photo of the three-axis LAW D21 as a model at muenster.de
- Photo of the two-axle LAW D21 from 1958 at the Eisenbahnstiftung
Individual evidence
- ↑ a b c d Hinrich Rudolfsen, Wolf-Jobst Siedler: The small railway Leer-Aurich-Wittmund . Kenning Verlag, Nordhorn 1997, ISBN 3-927587-46-X , p. 114-116 .