here is some data from R.G.S.White at MIRA,1969,
look at plan and elevation
if you take all of his best of each category you get Cd 0.245 (in 1969)
here's some windshield data from FIAT
cowl height
and nose
front lift
from Fachsenfeld (KAMM)
Hoerner
Eiffel
Eiffel
Walter Lay,1933
