I came here to post the same thing! The fuel economy on this was said to be excellent (because it's a tandem seating design), with the downside that the passen

I came here to post the same thing! The fuel economy on this was said to be excellent (because it's a tandem seating design), with the downside that the passenger was always relegated to the back seat... Gyrocars also featured in the awesome science fiction novel Sinister Barrier, by Eric Frank Russell (published in 1943!).