“Kiwee” [1 and 2] rotor diameter is 1.1 m. Its mass in flight is approximately 0.8 kg, without the lifter kite. A torus with an outer diameter of 2.1 m and an inner diameter of 1.2 m, a tube diameter of 0.45 m, a surface area of 7.328 m² leading to a weight of about 1.1 kg (0.15 kg/m²) without the fixations, a volume of 0.8244 m³ leading to a lift of about 0.9 kg with helium, could integrate it. But the volume is not sufficient. As a result, the initial proportions of the 42 cm outer diameter tire inner tube are changed. A torus with an outer diameter of 2.7 m and an inner diameter of 1.2 m, a tube diameter of 0.75 m, a surface area of 14.434 m² leading to a weight of 2.165 kg without the fixations, a volume of 2.7 m³ leading to a lift of about 2.96 kg with helium, could integrate “Kiwee” while in aerostatic equilibrium, with positive lift being provided by the kite regardless of wind speeds, even in very light winds. On the other hand, the shroud effect should be re-examined, knowing that during preliminary tests [4], the thicker buoy with similar proportions (outer diameter of 85 cm, and inner diameter of 38 cm) had a lesser effect.
Kitewinder [1 and 2] intended to develop a larger version [12) with a rotor diameter of 2.5 m, sweeping an area of 4.9 m². A torus (respecting the initial proportions) with an outer diameter of 4.725 m and an inner diameter of 2.7 m, a tube diameter of 1.0126 m, a surface area of 37.1 m² leading to a weight of 5.565 kg (0.15 kg/ m²) without the fixations, a volume of 9.39 m³ leading to a lift of about 10.3 kg with helium and 11.263 kg with hydrogen, could integrate it, and maybe lift it even without wind. In any case the whole thing would easily fly with a lifter kite even in light winds.