The first letter relates to maximum speed (A was the fastest originally, R was an afterthought as speeds increased to 140km/h, starting with the Re4/4 (eg Re420).How do these work? I figure that the ABD in RABDe 500 reference the first class, second class and luggage van accomodation, but what about the rest?
Surely the latest Re 4/4 class is the BLS Re 475 Vectrons?Yes, the first one is the "Zugreihe", literally train series, there is also a series N for tilting trains that's above R but that isn't used in the class description thus a 2nd gen pendolino is still a RABe 503.
A is first, B second and C used to be third class, so D is for a luggage compartment.
We used to call our loco series Re 4/4 I, II and so on up to IV then we switched to using the class number so the latest Re 4/4 is a Re 460.