A mechanism for attaching a wing to a fuselage of a model airplane. The chargedischarge control device selects one of the energy storage device and the solar panel as an operation power supply to the chargedischarge control device and generates an output voltage. In embodiments, the contract is implemented and bound upon ascertaining that the expressed functional aspects satisfy dependencies of the client service. In particular, the method is highly suited to objects having curved or angular components as the image-carrying medium may stretch to match the shape of the object. In a further embodiment, the phases are connected in a mesh connection.