Thanks fernytickles.
Seems to have a lot of balloning and boats but not a great deal of what could be quite challenging flying (piloting) in the proposed Rutan aircraft.
Round the world in "medium" aircraft means what; Piper, Cessna or small jet? Modern US trans-continental is surely not too far removed from merely shoving the throttle forward for longer on a conventional aircraft?
My question really referred to the relatively unconventional type, which MAY offer somewhat iffy flying qualities in a pretty hostile environment and the test/experimental experience that one might have thought relevant.
Once again, not knocking, before someone gets hold of the wrong end of the stick.