Quote:
Originally Posted by aerohead
The best angle will be a function of whether you have hard angles and flat panels,or curved panels and radii,and what percentage of total vehicle body length the boat tail possesses.
Hucho shows some fairly comprehensive work done by Buccheim et al.
The lowest drag shown is with the 'Template.'
You need to determine a length first
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Got it,
Determine maximum length, then work to optimise angles and curvature.
Just to note one of those studies did touch on curved tail flaps and found better results for lower angles, but not significant enoiugh to warrant moving away from flat plates.
This may well be another design constraint, the simplicity of construction, application and use.
Still digging through the detail to get a clearer picture.