Originally Posted by
tomato coupe
Since you know so much about this, maybe you can tell us the time required for the bottom bracket to naturally return to it's unstressed position and the damping time for side-to-side motion of a bottom bracket. In other words, what are the resonant frequency and Q factors for side-to-side motion of a typical bottom bracket?
I don't know, and I'm not aware of any measurements that have been done.
Intuitively, I'd think that the ~3 Hz input from the rider's legs would dominate, but I don't know if that's true. I can't imagine how it would matter... how is the frequency domain behavior of the frame supposed to generate significant losses that would vary directly with frame stiffness?
With apologies to the guys at Singer Porsche, everything does not matter.
--Shannon