·       The mechanism is a hingeless flapping avoid easy deployability provided by the use of technical hinges. Due to the high number of load cycles that act on gliding and rotating elements, however, hinges tend to gall over time which causes expensive maintenance or even periodical replacement. 

·       The mechanics and the louvers are scalable at different dimensions and are adaptable to free form double curved surfaces. 

·       Considerable view restriction 

·       Impossibility to exploit light and thermal control in case of strong wind. 


3.2.1 Mechanism

The façade is made of slightly curved GFRP plates which combine high tensile strength with low bending stiffness, allowing for large reversible elastic deformations. The lamellas are supported by two hinged corners at the upper and lower edge of the GFRP blade, while, in the other two corners, a small compressive force is applied in the plane of the fin, creating complex elastic deformation triggered by a failure mode, here shell buckling. Actuators reduce the distance between the two bearings and in this way induce a bending which results in a side rotation of the lamella.