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Autoturn 9.1 cost2/13/2023 ![]() ![]() NASA MOD-0 prototype (a 38 metre diameter downwind two-bladed rotor developed in 1975) was initially made with aluminium blades, but soon due to structural problems wood blades were installed. However, wood has a strong anisotropy and a huge potential variation of his properties, together with a notable tendency to water absorption that can lead to a reduction of resistance. The first wind blades where made using wood, a low cost, low density material with a good resistance to fatigue. ![]() Several years ago materials as varied as wood, steel and aluminium where used to produce wind blades. A fundamental aspect in the wind blades design is the choice of the correct materials, because several parameters (weight, load and fatigue behaviour, physical properties, etc.) are influenced by this basic decision. ![]()
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