Modlabupen.org

Tom Stanton
https://www.modlabupenn.org/

https://www.youtube.com/watch?v=aEPf0QHVuMM swashplateless mav

https://www.youtube.com/watch?v=d80oXSCcHTk mod of design by Tom Stanton

links
Diydrones arducopter

University Zurich quadcopter