Diema DL 8
| Diema DL 8 | |
|---|---|
| Number: | 268 |
| Manufacturer: | The MA |
| Year of construction (s): | 1950-1970 |
| Axis formula : | B. |
| Length over buffers: | 1,700-2,350 mm |
| Width: | 1,000 mm |
| Fixed wheelbase: | 760 mm |
| Service mass: | 2 t |
| Wheel set mass : | approx. 1 t |
| Top speed: | 8-8.5 km / h |
| Continuous output : | 6.9-8.1 kW |
| Motor type: | Single cylinder diesel engine |
| Power transmission: | mechanically |
The DL 8 from Diepholzer Maschinenfabrik Fritz Schöttler (Diema) is a small light rail locomotive.
history
The DL 8 was built in 1950 as the smallest construction by Diema up to that point and was mainly procured by smaller peat extraction and brickworks. A total of 268 copies were built, making the DL 8 one of the most successful Diema designs. The last locomotive was delivered in 1970.
From 1955, the DL 8 was supplemented by the DL 6 , which was basically the same, but was even smaller . The successor to both types was the DFL 10 , which corresponds to a reinforced DL 6 and is therefore smaller and lighter than a DL 8.
technology
The locomotives are built on a welded outer frame. The width of the frame depends on the track width , which is usually between 500 and 700 mm, but in exceptional cases also 1,000 mm. There are three different frame lengths: The first examples had an evaporator motor ; From mid-1954, smaller air-cooled engines were installed and the locomotive could be shortened by 13.5 cm. Finally, locomotives with a length of only 1,700 mm were also built, which corresponds roughly to the length of the smaller DL 6 series. Most of the DL 8 has the middle frame.
Depending on the customer's requirements, either curved sheets or a solid cast iron design were installed as buffers. Spring-loaded buffers were also used in the short frame variant. In order to increase the pulling power, the weight of the locomotives could be increased by additional weights.
The center distance is 760 mm for all three frame types. The axes were initially supported by evolute springs ; later coil springs were installed.
With probably only one exception, all of the built-in engines are from Deutz . The evaporator motor is of the MAH 914 type, later followed by the air-cooled types F1L 612, 712 and 812. The power is transmitted via a V-belt from the motor to a mechanical two-speed gearbox and from there via roller chains to the two axles. Braking is done with a throw lever brake.
The driver's seat is installed across the direction of travel so that the driver does not have to change his position when changing direction. The engine, gearbox and gear lever are located to the right of the driver and the brake lever to the left. Diema also offered the DL 8 with a simple protective roof or a closed driver's cab.