[aerohead]

Since Lightship is 'aerodynamic', I did a link to it at the Aerodynamics Forum, and went ahead with a preliminary estimation of it's particulars.
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Lightship has also left the door open to anyone who might 'lose' the TV, and loft the roof to create a 'motorhome' with the vestigial boat-tail.
Adding a boat-tailed 'trailer' to the 'motorhome' would allow for super pressure recovery for the new combination, ratcheting up savings to an even higher level.
This would be single-frontal area combination, 'single-hump' aero singularity, which could chase the Cd 0.12 of Walter Lay, of 1933, of which Lightship shares in similarity.