Tilting bogies
Another one of my whimsical "Why is it so" questions. Bogies, the type with wheels attached (not unidentifed aircraft or snot).
Is there any advantage per se in which direction the bogies tilt - some manufacturers have the leading wheel set tilted down, whilst other manufacturer's prefer the rearward wheel set tilted down.
To me, it seems "more natural" for the later - downward rear set - as forward down tilted ones seem to be harder to "grease on", and would appear to suffer more landing stress as there is bound to be SOME rearward torsional forces (whereas the rearward torsional force on a rear tilting bogie would not be transmitted directly through the bogie structure).
Just wondering...