The propellers harness the airflow to convert it into electricity, which is stored in two built in batteries. Additional LED-lights provide direct light-feedback when propellers are rotating in order to visualise a sizeable relation between wind intensity and electricity and allow the unseen wind power to be perceived through light. It requires an approx. 2h bicycle-ride at middle (wind) speed to charge the batteries completely (the helmet fulfills its duty also while snowboarding, skiing, sailing, hiking or kite/windsurfing.) You can then use the electricity stored in the helmet to load the batteries of your mobile devices (mobile phones, ipods etc) via two USB interfaces. The helmet can be operated in three different modes: device charging mode, light or airflow mode. I already had the pleasure to have the first “green” phone calls powered only by my bike rides through the city.

I’ve developed the propeller helmet concept within the scope of the Hedonoeko Association. The goal with the helmet is not to launch another „green gadget “. We want to use it as a medium to sensibilise the public for environmental topics and to integrate sustainability topics into the lifestye of young people by creating a positive experience.