Also, Nitinol Engines [1] are pretty phenomenal. [1] https://hackaday.com/2016/06/09/doc-johnsons-shape-memory-motor/ https://hackaday.com/2016/06/09/doc-johns

Also, Nitinol Engines [1] are pretty phenomenal. [1] https://hackaday.com/2016/06/09/doc-johnsons-shape-memory-motor/ https://hackaday.com/2016/06/09/doc-johnsons-shape-memory-mo...