The drive unit looks like a big powered cart that attaches to a dedicated hard point on the rear fuselage. Steerable main wheels allow the pilot to maneuver on the road. The manufacturer says the craft can hit speeds of as high as “73 mph” on the highway and can climb hills acceptable. The company’s website compares its road performance to a mid-1960s Beetle, which is to say, none too peppy. When you want to go flying, you put the drive unit in the back seat area of the airplane and go.