Yes! It's the 'elongation' Wolf H. Hucho spoke of in 1987. ' when vehicles developed for the lowest drag coefficient are evaluated for Cd vs length, the correlation is discerned and expected trend is in fact confirmed.' 2nd-Ed page-202.
' the drag reduction from an elongated tail varies almost linearly with the reduction in cross section area.
'PhD Jeff Howell et al, SAE Paper 2020-01-0673.
