High Quality Content by WIKIPEDIA articles! A scimitar propeller is shaped like a scimitar sword, with increasing sweep along the leading edge. Typically scimitar propellers are constructed of lightweight or composite materials. In the early 1900s they were made of laminated wood. The combination of light weight and efficient aerodynamics results in more power and reduced noise. Eight-blade scimitar propellers on the A400M. Propfan engines use contra-rotating scimitar propellers to achieve turboprop efficiency levels at high subsonic air speeds comparable to that of turbofans.

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