The rotor blades have other requirements in a high-altitude wind power station, than in a normal wind power station.

The main reason is the higher wind speed between 27 m/s and 50 m/s related to the different regions in the world and the possibility of using a diffusor, which can increase the wind speed.

The speed of sound is the highest wind speed that can be acceptable, because then the blade tips would always have to break through the sound barrier.

Due to this initial situation, it may be appropriate for some regions to use a low-speed rotor blade that works on the resistance principle and have a high-speed number of maximum (λ =3). The efficiency coefficient of performance is only about 0,25.

For the normal wind turbine, a low high-speed number (λ =5 or 6) must be aimed for to reduce the peripheral speed of the rotor blades.

In order to balance the forces of the rotor blades it is necessary to use a clockwise and a counterclockwise wind turbine. For this reason, an even number of wind turbines is always needed in the high-altitude wind power station.

In order to absorb the forces expected by the wind on the rotor blades, an additional attachment in the form of co-rotating struts can also be fitted between the rotor blade and the compressor, shaft or gearbox.

Related to the higher wind speed, the use of a diffusor and the speed of sound as the upper limit, the rotor blades are smaller than the rotor blades on the earth and are considerably shorter. At the moment the calculation is at a maximum length of 50 m.