Weitzer railmotor

: Weitzer János Gép,- Waggongyár és Vasöntöde Részvénytársaság) were Europe's first self-propelled railcars with internal combustion engine built in considerable numbers.

The Hungarian minister of trade, Lajos Láng, started a campaign for the development of self-propelled railcars in order to economize passenger transport on secondary railroads.

Ganz & Cie., though very inventive on other subjects, choose a conventional solution, and in 1904 installed a steam engine instead of the petrol motor.

This type of self-propelled railcars became class CmotVIIIa and CmotVIIIb of Hungarian State Railways (MÁV).

in 1903 transferred the electric transmission to a larger scale, and ordered four-cylinder petrol engines of 50 and of 70 horsepower from De Dion-Bouton.

The prototype railmotors had only one closed platform on the rear, a weight of 15 tons and 40 third class passenger seats.

As early as 1911–1913 it was electrified and in 1913 the internal combustion cars were converted to passenger trailers with a luggage compartment.

The NyVKV (Nyíregyházavidéki Kisvasutak / Nyíregyháza Outskirts Narrow-gauge Railways), opened in 1905 also on 760 mm (2 ft 5+15⁄16 in) gauge, bought four Weitzer railmotors in 1906 and one more in 1907.

When in 1911 the section inside Nyíregyháza was converted into an electric tramline, the petrol-electric railcars were equipped with bow collectors, so that in town all trains could run without emissions.