Breakthrough tiny wind turbine boosts energy output by 83% with 35% less weight
Wind tunnel tests revealed that the turbine can reach up to 450 revolutions per minute and deliver a power output of 2,500 watts at a wind speed of about 32.8 feet per second (10 meters per second).
If this is confirmed, it could also constitute a lead for lighter wind turbines in flight.
In the meantime, see the power curve of a 8 kg 3 kW wind turbine: 3 kW at 15 m/s wind speed, and up to 5 kW at 23 m/s wind speed (how much in a real world? If these measurements are verified and the wind turbine withstands over time, this can be interesting for stronger winds at high altitude), sold in France for a little over 400 euros, just below.
A torus surrounding one or more wind turbines was discussed here.
With the wind turbine described above, assuming a rotor diameter of about 2.5 m, a torus with an outer diameter of 4.725 m and an inner diameter of 2.7 m, aerostatic lift of about 10 kg, could be carried by a lifter kite even with light winds.
Thus, we have a regular wind turbine, an aerostat (torus), and a lifter kite.
Some photos:
The wind vane improves stability.