Quote:
Originally Posted by freebeard
From first principles: The Holy Template, based on a half-circular cross section, is commonly applied to vehicles with a rectangular cross section. Mair is more useful.
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Careful! The Mair boat-tail is also based upon a streamlined body of revolution with ogival nose.
Jaray actually blended his body from circular section, to 'square', then back to round for the tail. Just as an HVAC contractor might do with ductwork ( Dallas Museum of Art has this hidden in the walls ).
Walter Lay, at the University of Michigan, used exclusively 'square' bodies. Seventeen degrees downslope on top, eleven-degrees on his boat-tailing. Cd 0.12 was his drag minimum. The FKFS reproduced his research and didn't dispute his numbers.