We might as well have a dedicated thread for this topic as it has implications for the Motorcycle forum (I'll put it over there as well).
All the images will be from 'AERODYNAMIC DRAG',by Sighard Hoerner (of Fieseler/Junkers/Messerschmitt),'invited' to the USA under 'OPERATION PAPERCLIP',self-published 1951.
The 1st image is self-explanatory from its title.(there will be additional images to come)
Here is a second table showing canopy drag
Here is a 3rd table for gun turrets which are germane to canopy desing