Wood is nowhere near strong enough for this. Metal is stronger than wood, and even that's not strong enough. Tensile Strength to Weight is the important measur

Wood is nowhere near strong enough for this. Metal is stronger than wood, and even that's not strong enough. Tensile Strength to Weight is the important measure here - but you can't just take a block of wood vs an equal weight block of steel and compare (if you did, wood actually wins). Steel can be formed into very efficient shapes that significantly lighten it, wood can't. The same issue will arise here for use in a turbine - only worse, because the material they use even outperforms steel, and is very very carefully and efficiently designed.