[aerohead]

1) Cd is based upon frontal area
2) Drag minimum occurs @ CdA minimum
3) 'Laminar' profile Cds are Rn-dependent
4) Rn is 'size', 'velocity', and 'kinematic viscosity'- specific
5) The metric for Rn-related ' size' is length
6) The 'length' of any given 'laminar' profile is a derivative of Af ( scaling-factor)
7) Competition 'laminar' bodies are 'shrink-wrapped' over, and constructed to fit around the body of a single individual team member chosen for 'pilot'
8) The smallest Af = the shortest length
9) The shortest length = smallest RN
10) The smaller the Rn, the longer the delay in reaching transition to super-critical Rn
11) Super-critical Rn brings a concomitant transition to TBL
12) TBL renders a 'laminar' profile impotent
--------------------------------------------------------------------------------------
A curiosity in research reporting is, that for the Rocketail Wing.
The investigators at the University of Glasgow derived their Rn of 5.3 X 10-to the 5th, upon the 18-wheeler's height, rather than length. First I can recall, ever.