Pretty interesting. I don’t care about the ‘green footprint’ nonsense, I just think that fluid power as an energy storage medium has a lot more potential than we think. Eaton and Parker Hannifin have both developed hydraulic hybrids that use braking hp to store fluid power that is used to start the vehicle moving again - perfect for things like garbage trucks and delivery vans. A French company was working on a compressed air-powered small car, but this in a moped form would seem to be very useful too.
What I could not understand about the French car is It’s moving @ whatever MPH all it takes to compress the air back to the tank is a flywheel on a wheel moving to compress air!
With pressure valves and dual tanks the air could be replaced while driving!