Type of wings
These wing profiles are high performance at high winds. They can exceed the wind speeds and continue to increase the revolutions per minute (rpm’s). The profiles, which have been carefully crafted with airfoil segments, are carefully chosen and designed with great precision.
This type of wing is ideal for low wind conditions. These types of wings maintain wind speeds and get the revolutions per minute (rpm’s) going which in turn generates the useable energy. Both pressure drag and friction drag are present. At very low speeds, and for small objects i.e. dust particles, the friction drag dominates. At high speeds and/or for large objects, pressure drag dominates. The drag coefficient for an object will therefore depend on which type of flow is dominating.