Here shown in ellipsoidal form, are two aerostatic balloons connected axially by a single connecting cable on which two guides slide, each connected to its own parachute’s cables; the same cable is passed through each parachute’s spill hole which are connected to their sliding guides by a cable kept in tension by a return spring inserted in the guide itself.

In all 9 illustrations, the wind applies its force from left and in illustration 1 the blue parachute is solidly fastened to the connecting cable at the fastening point, allowing it to be pulled (active phase).

In illustration 2 the blue parachute is released from its fastening point and, pushed by the wind, it begins its run towards its aerostatic balloon. During this run, it pulls the yellow parachute upwind by a lateral cable; the yellow parachute is kept closed by force applied by the sliding guide to the spill hole.

In pictures 3 and 4 the blue parachute reaches its aerostatic balloon and conforms itself to its shape by overturning and wrapping itself around it.

In illustration 4, the blue balloon’s sliding module fastens itself to the spill hole on its parachute as the yellow balloon’s sliding module fastens itself to the connecting cable at the fastening point. No parachute is open and the entire aerostatic module is at its minimal aerodynamic resistance (passive phase).

In illustration 5 the spill hole of the yellow parachute is released from its sliding guide and offers its surface to the wind up to its compete deployment, as seen in picture 6 (active phase).

At this point, the same situation described in picture 1 is represented, with the two parachutes in inverted functions, ad ready to begin the same cycle described up to picture 9 in which no parachute is open in order to give the aerostatic module the lowest possible aerodynamic resistance (passive phase).