CdA of a bike without rider 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?
There are, but measurements typically will be protocol-dependent (and vary slightly between different wind tunnels). 

For example: 

Here is a link to a comparison done at the A2 Wind Tunnel in North Carolina almost a decade ago, on bicycles standardized to frame and wheels, but without saddle or handlebars. Other protocols may include saddles, handlebars, and the standard wheels and tires provided with the bike. 

Here is a link to a comparison done in 2012-2013 by Trek on their Madone in the San Diego Low Speed Wind Tunnel. Note the differences in protocol.

Here is a link to a Trek whitepaper on their Speed Concept.