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Da Vinci Helicopter Aerial Screw

Regular price $42.95

Tax included.

Leonardo da Vinci developed concepts for a giant air screw late in the 15th century. While today's scientists believe the design wouldn't fly, this model is a realistic scaled representation of his design. It includes da Vinci gears, a helical sail and a crank. It also integrates well with figurines and can be painted or oiled.