360view wrote: " My mechanical engineering senior class’s assigned “capstone” project was to split into 5 person teams and design flywheel powered vehicles to transfer suitcases from passenger terminals to and from airliners."

I had a similar Mechanical Engineering senior project when I went to college. Does the name 'Oerlikon Gyrobus' ring a bell? Those were flywheel-powered city buses that came out in Switzerland around 1951. They were used many years in Europe and later in South America. I never understood why the technology never caught on.