Famously Piaggo who were aircraft manufacturers found themselve at the end of the Second World war with lots of aircraft tailwheels they needed to put to some use.
At that time personal transport was all but none existent in Italy and someone in the company put their inventing hat on, and using a
Aircraft construction techniques created the Vespa scooter (Because it sounded like a wasp)
This is what it looked like in 1946
Fortunately they soon improved the looks!
This was the model I bought second hand in 1960
The only weak point was the clutch , which was driven through a single tooth
Plate running in slots in a bell housing and in use cut slots into the metal at the side of the slots it was supposed to move up and down in.
This jammed the clutch completely and needed the engine out to fix, which I did twice in the 32,000 miles I drove it.