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The ability of the Wright brothers to analyze a mechanical problem and move toward a solution was apparent from the outset of their work in aeronautics. The brothers realized that a successful airplane would require wings to generate lift, a propulsion system to move it through the air, and a system to control the craft in flight. Lilienthal, they reasoned, had built wings capable of carrying him in flight, while the builders of self-propelled vehicles were developing lighter and more powerful internal-combustion engines. The final problem to be solved, they concluded, was that of control. Most aeronautical experimenters up to ...(100 of 3423 words)