Tried again to understand a tiny bit more the animations... and failed miserably.
I tried to animate the attached model using groups, but top rotor doesn't rotate correctly (it starts rotated 90°). Suspecting (wrongly) it might be an interaction with submodels, I flattened the model... to get a result even worse. Looking at the propriety of the groups, I guess I understand what happens: their default orientation is not identity, so the setOri wipes out their initial rotation. I guess I could solve this with a matrix multiplication, but it's much more complicated than I expected...
Otherwise, I tried also something else: animate flexible parts. I hoped that if I included a flex part path point to a group, this path point would be animated too with the group... doesn't work!
I tried to animate the attached model using groups, but top rotor doesn't rotate correctly (it starts rotated 90°). Suspecting (wrongly) it might be an interaction with submodels, I flattened the model... to get a result even worse. Looking at the propriety of the groups, I guess I understand what happens: their default orientation is not identity, so the setOri wipes out their initial rotation. I guess I could solve this with a matrix multiplication, but it's much more complicated than I expected...
Otherwise, I tried also something else: animate flexible parts. I hoped that if I included a flex part path point to a group, this path point would be animated too with the group... doesn't work!