Dynaero: A bicycle helmet that can change shape according to aerodynamics

Foreign media reported that whether it is the ultra-light kettle rack to save a gram of weight or in order to get more power to adjust the pedal in a sport like a bicycle ,every small advantage will have a huge impact. Similarly, even designing helmets that maximize the use of wind power is not necessarily the best aerodynamically advanced, so a researcher from Australia is working on a dynamic version that gives athletes a greater advantage by changing the shape of the helmet at different stages of the competition.


“Most helmets are static and don’t change based on the game,” said Dr. James Novak, a researcher at Deakin University’s School of Engineering. Professional time trial helmets are designed with few ventilation to achieve the goal of minimizing resistance, but the result is that athletes can only wear them for a short time before they are at risk of overheating. In races such as the Tour de France, which lasts four to six hours, helmets must strike a balance between aerodynamics and ventilation; “

To do this, Novak has designed a 3D-printed helmet that will only open its exhaust vents when needed. The bike helmet, called Dynaero, is connected via Bluetooth to a computer and sensors mounted on a bicycle or smartphone. From there, it can open or close the vents depending on temperature, speed or other conditions.

Dynaero is equipped with Arduino Uno, Bluetooth sensors, micro servos and a custom mobile phone app that uses built-in acceleronos to determine speed and thus control the opening and closing of the vents, Dr. Novak said, adding that “a future version of the helmet will also be linked to a range of bicycles and wearable sensors.”


Although the project is still in its early stages, Novak has produced a 3D-printed prototype and tested it in the wind tunnel with commercial helmets. Under current cycling regulations, the helmet sits are not yet approved for use, but the engineer said the helmet has attracted interest and is expected to get the green light in the next race to find its place in the main car group.


“Dynaero is a responsive helmet that turns off the ventilation system during a fast descent or sprint, which can improve the aerodynamics of cyclists by 3.7 per cent,” says Novak. And when aerodynamics aren’t that important, such as slow climbing, vents open to increase air flow and keep cyclists cool. In this case, the performance and health of the bike can be improved by intelligent design. “

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