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Trolleybus Skoda 7Tr

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General description of the trolleybus

         The trolleybus had a self-supporting, steel body. A direct current DC motor is located between the axes. On the car body there was a wooden, lined protective strip run in the middle of the height of the side plating, also used in the first series of the successor - 8Tr. The floor height was 75 cm. The trolleybus had 3 doors. The wiper drive was pneumatic. The side windows were dropped. Electric heating was used.
         The trolleybus was guided with 3 pedals. The right one was for semi-automatic, electro-pneumatic starting, middle for electrodynamic and pneumatic braking, and left for pneumatic braking. Sliding sanders are used on the rear axle to facilitate driving on slippery ground. The maximum speed was 50 km / h.
         Electrical equipment was in front of the driver's cab. The self-starter was located on the right side of the electric chamber (looking in the direction of travel).


  • Driver's cab of the trolleybus

Skoda 7Tr. Driver's cab


  • Passenger compartment of the trolleybus

Skoda 7Tr. Passenger compartment

Skoda 7Tr.Passenger compartment

Skoda 7Tr.Passenger compartment


  • A schematic drawing of the trolleybus

Skoda 7Tr. A schematic drawing


  • Main technical characteristics
Maximum speed, km/h 45 - 56
Passenger capacity, people 82
Number of seats 24
Unladen weight of trolley, ready for operation, kg 10 000
Maximum mass, kg 16 000
Mains voltage, V 550
The floor height above the road, mm 750
Number of doors 3
Length, mm 10 700
Width (without mirrors), mm 2,500
Engine control system Rheostat Contactor Control System (RCCS) «Škoda» or «ČKD»
Traction motor
Engine model Al 2943 sN (Škoda) ČKD SZ 2 OCB 8-C (ČKD)
Nominal capacity, kW 96
Frequency of rotation 1600


Trolleybus units
  • Electrical equipment
   Electrical equipment was in front of the driver's cab. The self-starter was located on the right side of the electric chamber (looking in the direction of travel).

Шкода 7 Тр.Electrical equipment

  • Steering gear with servomotor.

Шкода 7 Тр.Steering gear

  • Front axle

Шкода 7 Тр.  Front axle

   Rigid front axle of the trolleybus suspended on longitudinal leaf springs, with steering rods.
  • Rear drive axle

Шкода 7 Тр. Rear drive axle

   Rear drive axle with large overall ratio, with main bevel gear and lateral cylindrical rollers.



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