They've got a solar powered one:
(
J Peasemould Gruntfuttock Alpha Mike Foxtrot,
Thu 11 Feb 2010, 10:42,
archived)
Why have they not done this?
*strange world
(
Hummel Who died and made you....oh wait....,
Thu 11 Feb 2010, 10:44,
archived)
Too expensive?
Also: Massive sails of solar panels? Massively impractical. It'd take a lot of designing.
(
Ghostwriter can't pick up his pencil,
Thu 11 Feb 2010, 10:50,
archived)