![What are the aerodynamic design principles behind the "supersonic" propeller of Luigi Colani's C-309 racing plane? - Aviation Stack Exchange What are the aerodynamic design principles behind the "supersonic" propeller of Luigi Colani's C-309 racing plane? - Aviation Stack Exchange](https://i.stack.imgur.com/8TPDd.jpg)
What are the aerodynamic design principles behind the "supersonic" propeller of Luigi Colani's C-309 racing plane? - Aviation Stack Exchange
![What are the aerodynamic design principles behind the "supersonic" propeller of Luigi Colani's C-309 racing plane? - Aviation Stack Exchange What are the aerodynamic design principles behind the "supersonic" propeller of Luigi Colani's C-309 racing plane? - Aviation Stack Exchange](https://i.stack.imgur.com/IHkJ8.jpg)
What are the aerodynamic design principles behind the "supersonic" propeller of Luigi Colani's C-309 racing plane? - Aviation Stack Exchange
![Luigi Colani Design Museum on Twitter: "What are the aerodynamic design principles behind the “supersonic” propeller of Luigi #Colani's C-309 racing plane? https://t.co/Y6qLKSBiWP https://t.co/IiJjVqfdze" / Twitter Luigi Colani Design Museum on Twitter: "What are the aerodynamic design principles behind the “supersonic” propeller of Luigi #Colani's C-309 racing plane? https://t.co/Y6qLKSBiWP https://t.co/IiJjVqfdze" / Twitter](https://pbs.twimg.com/media/ESxC0QEWkAEwuRn.jpg:large)
Luigi Colani Design Museum on Twitter: "What are the aerodynamic design principles behind the “supersonic” propeller of Luigi #Colani's C-309 racing plane? https://t.co/Y6qLKSBiWP https://t.co/IiJjVqfdze" / Twitter
![What are the aerodynamic design principles behind the "supersonic" propeller of Luigi Colani's C-309 racing plane? - Aviation Stack Exchange What are the aerodynamic design principles behind the "supersonic" propeller of Luigi Colani's C-309 racing plane? - Aviation Stack Exchange](https://i.stack.imgur.com/NjvZ7.jpg)