I was just watching some show about X-planes and one of the things mentioned is that when a plane travels at speeds above mach 6(?), friction of the plane and the atmosphere is so great that it can even melt metals. Engineers have resorted to projecting plasma/air/whatever ahead of the plane to create a layer of air/vacuum that shields the plane's body from the abrasive atmosphere.
I can definitely imagine scifi shuttles having a non-aerodynamic shape because the shuttle's hull won't help a single bit with flying through the atmosphere at high speeds. The airfoil shape required for atmosphere flying can be created by projecting an invisible shield around the shuttle, and also serve to protect the shuttle from the immense heat.
The space-shuttle is non-impressed.
