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Creation: BKV CAF Urbos (short)
Author: AshiValkoinen (Donát Raáb)
Year: 2016.03.
Uploaded: 2018.05.
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ADVICES
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The LDD-file you can download from this folder contains the 9V-version of my Budapest CAf Urbos tram (short version). The tram consists of 5 segments, and it has wheels only under the first, third and fifth segment, second and fourth segments are suspended. Since the tram is built in 8W (8 studs wide), the suspended segments are quite heavy and they are connected to the wheeled segments with three connections - turntable plates and plates underneath and technic beam on the top. Because of the tripled connection the tram is quite rigid and does not tolerate will rapid changes in tracks ramps - make sure your tracks the tram is running on have no steeper ramp than 1 plates / 1 straight track. Ramps under curves and points, or near curves and points are not tolerated as well.

The tram is 8W, so it is not proportional to my 8W train designs - trains are often 2800-3200 mm wide for real, while trams of Hungary vary between 2200-2650 mm. This LDD-design gives approx 1:38 scaled replica of the tram.

For driving the tram I put two 9V train motors underneath but two PF train motors can do the job as well. Since LDD-files cannot incorporate exact wirings, I uploaded several photos to the LDD file's gallery to show how I implemented the PF inside.

Battery box and IR receiver are in the middle (wheeled) segment, built into the top. The train motors are on one of the outputs of the receiver in the following order:

1. Short extension cable goes out from the IR receiver to the second (suspended) segment.
2. The first segment's train motor is connected to this short cable. The train motor's cable leaves at the train motor end facing the suspended segment. 
3. A long extension cable is connected to the short cable in step 1. it goes backwards, through the third (middle, wheeled) segment, reaching the fourth one, with the same top design as the short cable's end on segment two.
4. The second train motor of fifth segment is connected to the long extension cable's end (step 3.), and the train motor's cable faces the front of the tram. Thus both train motors will be driven to the same direction without the usage of plarity reversal brick.

I advice to transport the tram to events without dismantling the cable system, finding a long enough transport storage box for it.
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FEATURES
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This LEGO-creation is a quite realistic replica of the Hungarian CAf Urbos tram running in Hungarian capital, Budapest. I took care of many details which can't be considered with 8 wide trains but can be formed using LEGO-bricks when building an 8 wide tram (trams are narrower than trains for real, so a 8W tram can have more details than a 8W train).