Originally Posted by
ShannonM
Sorry, I thought you were asking about the steel itself. Mea Culpa, my bad, whatever.
And you still haven't answered the question of why this number that you're demanding is relevant to the question at hand. Do you think there is some frequency domain mechanism at work that would make "flex wastes energy" a true statement? Like, what... phase cancellation? Resonant heating, like a 3 Hz microwave? Harmonic distortion in the rider's 5th chakra?
You made a broad statement about frame losses that directly involve the side-to-side motion of the bottom bracket. If you can't even provide rough estimates for the parameters that determine the motion of the bottom bracket, you have no hope of describing the dynamics of the bike+rider system.