RARE! NASA 16′ Transonic Wind Tunnel Sitka Spruce Wood Fan Blade Propeller Model Sitka Spruce Fan blade from NASA Langley 16′ Transonic Wind Tunnel *Very Rare* “This wind tunnel no longer exists, and very little remains as historic artifacts available to the public from this remarkable tunnel. You are buying a true piece of aviation and aeronautic history. Most of these fan blades were re-purposed by NASA and used as […]