Quote:
Originally Posted by freebeard
Define sectional density?
|
It's synonymous with area rule,where the body cross-section varies only gradually as a function of longitudinal location,ensuring no pressure or velocity spikes(Bernoulli's Theorem),which protects the turbulent boundary layer from counter-flow,eddy roll-up, separation,and turbulence; allowing pressure regain and a higher base pressure,mitigating pressure drag.
Tesla's sharp edges and sharp intersections could be improved upon,but the basic silhouette is quite a bit like a streamlined half-body.