This question at aviation.se got me calculating the acceleration of a bike strapped to the outside of a plane if the straps broke. As you do. I couldn't find a figure for CdA of a bike without rider anywhere, and it seems to me that the rider's body will dominate the system CdA.
A more realistic situation for most of us would be consdering the forces on a bike on top of a car, again from the point of view of secure attachment (e.g. tryiong to fit an unusual bike with home-made brackets).
So are there published figures for the CdA of bikes (any type) without riders?