Wow, a real Cd of 0.36 (measured in a modern accurate full-scale wind tunnel) is spectacular - I didn't know a Jaray shape could get as low as that.
So many old 'streamliners' have Cd values that were measured in maybe 1/8th model tests with not much idea then of how to extrapolate them to full scale and folks tend to believe the fanciful numbers they gave out (those beautiful big Tatras particularly).
