Report on Development of Wood Wings for Aerowatt Windmills

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Report on Development of Wood Wings for Aerowatt Windmills

The wooden wings are used on French Aerowatt mills that generate power for telecommunication equipment in Greenland. The wings could, however, not stand up to the arctic storms, and they broke. Therefore som load tests of wings of different sorts of wood have been carried out. The following experiments were performed: 1) Boards of different woods with the same thickness were made. These boards were then loaded with sandbags until breaking, if possible. The deflection related to the load is presented. 2) Boards of different woods with increased thickness at the root were made. The increased thickness decreases until the middle of the wing, and the rest has the same thickness. These boards were loaded until braking, if possible. The deflection related to the load is presented. 3) Load experiments were performed on the wing that was sent from Greenland Technical Organization. The deflection related to the load is presented. 4) Load experiments were performed on 2 wings made of Kerto and pine, respectively. The wings were loaded until breaking. (ERA citation 12:011114)