BVG Class D

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BVG Class D
In service	1957–2004 (Berlin U-Bahn) 1999–present (Pyongyang Metro)
Manufacturer	AEG O&K Siemens Waggon Union
Constructed	1956–1965 (1) 1965–1973 (2)
Entered service	1957 (Berlin U-Bahn) 1999–2000 (Pyongyang Metro)
Successor	BVG Class H
Operators	Berliner Verkehrsbetriebe Pyongyang Metro
Specifications
Car body construction	Steel
Car length	15.55 m (51 ft 1⁄4 in)
Width	2.65 m (8 ft 8+3⁄8 in)
Height	4.25 m (13 ft 11+3⁄8 in)
Doors	3 doors per car
Maximum speed	70 km/h (43 mph)
Electric system(s)	750 V DC third rail
Current collector(s)	Contact shoe
Track gauge	4 ft 8+½ in (1,435 mm) standard gauge

You can help expand this article with text translated from the corresponding article in German. (June 2020) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing German Wikipedia article at [[:de:BVG-Baureihe D]]; see its history for attribution. You may also add the template {{Translated|de|BVG-Baureihe D}} to the talk page. For more guidance, see Wikipedia:Translation.

Class D was a type of electric multiple unit train used by the Berlin U-Bahn.

After World War II the trains of the Berlin U-Bahn were worn out, making a new series of trains necessary. From 1957 on the new D type trains were delivered (also called Stahldora/Steel Dora). They were made of steel, making them very heavy. In 1965, the DL type was developed, which was constructed from lighter metals (also called Dora). This way, weight was reduced by 26%. Like in earlier types the seats were located along the sides of the train.