On 27/11/2019 08:09, Prescott wrote:
> It would be worth buying just that floorpan with its atrocious power bogie seating to use as a demo to show people how not to design tram interiors.

>

The problem with the Siemens and CAF designs is that the springing attaching the bogie to the carbody is towards the centre of the bogie frame.

I attach Matthew G's pic showing the arrangement for the CAF.

This means that there is no space between the seats over the bogies inside the car.

Newcastle copes with the intrusion by a mixture of longitudinal seats and luggage racks- as in second attached pic.

The Alstom design places the springs towards the outer corners of the bogie. See: https://tdu.to/i/64227

This allows facing passenger seats over the bogies, but makes the suspension much stiffer as mentioned in the Adelaide expert report.

The Bombardier Es avoid the problem by having swivelling bogies and no direct spring attachments to the carbody.

Mal Rowe - beginning to understand the impact of design choices for low floor trams