Quote:
Originally Posted by freebeard
Else aerohead's half-body in profile with inadequate fineness ratio.
My geodesic approximation of the half body is asymmetrical on two planes.
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That's a good way to put it!
When the aft-body portion is less than 350% of the body's 'thickness' ( V ),the attendant super-deceleration of the flow creates the adverse pressure gradient that triggers flow separation ( at the heart of what Fachsenfeld / Kamm found at the FKFS, around 1935 ).
These 'bluff' rear ends are responsible for crappy, vortex-induced drag and lift coefficients.
The 'double-frontal-area' pressure signature of the 'double-hump' TV/TT 'system' aggravates the situation.
A 'real' aerodynamicist would insist on an aerodynamic 'singularity.'