I like that car too, but not really very practical! The KR is the most plane-like of all the well known micros/bubbles, Heinkel Trojans are more like helicopters. Morgans/Sandfords/Darmont-Morgans and D'Yrsans all have an aeronautical look too. One Morgan was customised a bit like the one in your pictures, but also had small dummy wings!
I reckon the Dymaxions have an aeronautical look too, but WAY outside the "micro" classification, even by US standards!