Any gearbox experts here? Just puzzling over why really big gearboxes are c ommonly avoided. Locomotives mostly use electric transmission and the relia bility of gearboxes in things like wind turbines isn't great.
Is there some reason to do with scaling the geometry, like if you double th e size of every dimension, the shaft can transmit more torque than the teet h? At a quick glance, it doesn't seem that simple. Or is there more slip be tween the teeth and more wear? I can't figure out a concrete reason and it' s bugging me :-).
Chris