Page "Stefan Drzewiecki" Paragraph 3
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Beginning in 1877, during the Russo-Turkish War, he developed several models of propeller-driven submarines that evolved from single-person vessels to a four-man model.
He developed the theory of gliding flight, developed a method for the manufacture of ship and plane propellers ( 1892 ), and presented a general theory for screw-propeller thrust ( 1920 ).
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