Retractable Sail Could Give Bikes A Boost Of Wind Power
Open link in next tab
Retractable sail could give bikes a boost of wind power
https://newatlas.com/cyclewing-bicycle-sail/58303/
Although there's nothing like cycling with a good tailwind, your bike and your body are only capable of catching a limited amount of that wind. The CycleWing was designed to help, acting as – you guessed it – a sail for your bike.