New fun news from the Zusi family. Alwin Meschede took a serious look at air drag, using simulation software from Autodesk.
http://www.echoray.de/Archive/726 (in German)
In short, he was fed up with the hear-say figures for air drag coefficient, so he rented Autodesk Flow Design for 40€ per month, converted lots of Zusi models and fed them this programme which simulates an wind tunnel with a granularity of some 20 to 30 cm voxel size. (I.e., the world is built from 20x20x20 cubes in this simulation.)
Just before someone brings it up: No such things do not delay the release, they are independent, parallel developments.
I always maintained that getting Zusi 3 will be worth it for the manual alone. Now if you get a database of meticulously computed physics data for free with the book, what else can you ask? A driving simulator that actually uses these values is said to be enclosed with the book.