Excuse the intrusion and ignorance.
> Friend came over today with the strangest car I've ever seen.
> Three wheeler with the single wheel at the rear.
What's unusual about that? Most three wheelers have that configuration:
Morgan, Messerschmitt/Schmitt, Free/Kindred Spirit, Lomax, DRK, Grinnell Scorpion, AF GP/Spider, Stimson Scortcher, Ranger Cub, Berkeley, JZR, Triad/Mosquito, Trimini, ABC Tricar, Black Jack Avion, Pembleton, Peel P50, ...
I was going to add Heinkel and Isetta but I've a feeling that they have two rear wheels close together.
It's the most stable configuration. I can't think of any cars (not trikes) that have the single wheel at the front apart from Reliants, Bonds and invalid cars.
Btw, if you are going to post the same message to more than one ng please do it with one message, then we only read it once.