Mercedes-Benz O 305 GG

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The Mercedes-Benz O 305 GG - alternatively also referred to as Mercedes-Benz O 305 G 2 - is a former track bus / O-Bahn test vehicle from Daimler-Benz . The design of the double articulated trolley was based on the conventional articulated bus series O 305 G , the second G or the number 2 in the type designation should identify the additional articulation.

The O 305 GG was presented to the public for the first time at the Hanover Fair from April 1 to 8, 1981. Otherwise, the prototype was only used - in camera - on the company's own test track on the Mercedes-Benz factory site in Rastatt . In 1996 the vehicle was still there at the Mercedes-Benz plant in Mannheim , later it was scrapped.

The test vehicle is both older than the first double articulated bus ( MAN , type SGG 280 H from 1982) and older than the first double articulated trolleybus ( Uzina Autobuzul Bucureşti , type MEGA from 1988).

general description

The 24.08 meter long, 30.2 tonne, four-axle car consisted of three parts. A special feature was - unlike all double articulated wagons built later - its symmetrical structure. In fact, there were two series O 305 standard bus bodies, each with two axles, between which a floating middle section was inserted. The O 305 GG had a driver's cab at each end and was therefore able to drive in both directions as a bidirectional vehicle. Accordingly, he had entrances on both sides, four in number. The so-called large - capacity vehicle weighed 30.2 tons and, including standing room - depending on the source - offered 238 or 240 passengers . In addition to the typical omnibus transverse seating in the form of a compartment, longitudinal benches typical of the subway were also used.

There was also a conventional steering wheel at one end of the vehicle , so that the car could be moved away from the lane guidance and overhead line using an auxiliary drive . In fact, it was a two-way vehicle . However , the O 305 GG was not approved for road use .

Electrical equipment

The power was supplied by means of two single-arm pantographs from a single-pole overhead contact line . The height was 3.25 meters when the pantograph was lowered and 4.50 meters when the pantograph was raised. The return current flowed over the front support arms of the guide rollers, which were used to hold the sliding contacts, into the guide rails arranged on the side.

The drive consisted of two electric motors, each with an output of 250 kilowatts, with which up to 100 km / h could be achieved. The motor control was taken over by a standard chopper control from AEG-Telefunken , as was also common in contemporary light rail vehicles at the time. One driver's cab was equipped with an accelerator and brake pedal, while the other had a manually operated setpoint generator . On the drive side, a train or multiple traction would also have been possible.

See also

Web links

Individual evidence

  1. ^ First MAN double articulated bus SGG 280 H :, on muenchen-busse.de
  2. Bucureşti, trolleybus no. 7091 , on transphoto.ru
  3. Mercedes-Benz Classic-Wiki: Chronicle 1981–1990 ( Memento from August 26, 2010 in the Internet Archive )