Here is a comparison drag table which might have value in plan-view streamlining contours.
Two of the profiles have particularly low 'signatures' with respect to the cylindrical form.
And you can see a bit of 'phantom tail' where one tail was rounded over like today's blimps,with little if any drag penalty.
Here's the link:
http://www.willswing.com/images/feat...on_600_690.jpg