Stefan Drzewiecki Polish inventor
Stefan Drzewiecki‌ He was born in 1843 in the village of Kunca in Podolia. He came from a wealthy noble Polish family. He went to study in France, but after hearing about the outbreak of the January Uprising, he returned to Poland. The outbreak of the Franco-Prussian war made him finally to live in Vienna.
He was a Polish scientist, journalist, engineer, constructor and inventor, working in France and the Russian Empire. Beginning in 1877, during the Russo-Turkish War, he developed several models of propeller-driven submarines.
Discovery: He developed the theory of gliding, and presented a general theory for a screw-propeller. His first invention was the kilometer counter for horse-drawn carriages patented in 1867 in Paris.
In addition, Drzewiecki presented at the exhibition an automatic coupling for wagons, a train speed recorder and a dromograph which is an automatic instrument plotting the course of a sailing ship.
Submarine Drzewiecki:
Monument in Gatczyn
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