Human-Powered Washing Machine

Last weekend's Senior Design Expo at Wright State University was packed with a variety of engineering capstone projects, each starting with a really interesting problem which the students solved in innovative ways.  One of my favorites is this bicycle-powered washing machine, which had to be built only from parts easily found in Africa, and consisted mainly of various bicycle parts and a drum.  Genius in its simplicity.

https://www.wright.edu/events/senior-design-expo-0