Robert Schlageter of Luzer, Switzerland, was born in 1887. He quit his technical studies in Burgdorf to devote himself to aviation. After first tests with gliders, he began to build, with the help of two friends, his first monoplane, with a triangular-section fuselage and an Anzani engine, in 1909. Then he built in four months, for a company in Mainz, another monoplane of the same type. His planes flew only in good wind conditions, but he won a prize at a fair in Chemnitz in 1911. He had to quit aviation for economic reasons, was forced to sell his planes and spare parts.
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