16 pp
Louis Béchereau, a talented designer who stayed with Spad after the reorganization of the company, was responsible for the successful series of Spad fighters in World War I. In 1915, he recognized the design limits of the then popular air-cooled, rotary engines that powered most French aircraft. A fixed, water-cooled engine, capable of generating at least 150 horsepower, was in his view the power
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