Answer :
Final answer:
The Wright brothers went from flying gliders to achieving powered flight in about four years, from their initial glider tests in 1899 to their powered flight in 1903. This period involved significant innovations and design improvements. Thus, the correct answer is around four years, which may not directly match the options provided.
Explanation:
The Development from Gliders to Powered Flight
The transformation from a glider to a powered airplane involved significant innovation and development by the Wright brothers. They began their work on gliders in the late 1890s, with notable tests in 1899 and 1900. After extensive experimentation and adjustments to their designs, the Wright brothers successfully flew their powered airplane, the Wright Flyer, on December 17, 1903.
This timeline indicates that it took approximately four years of development from their first glider flights to achieve powered flight. They made their initial glider tests in 1899, leading to their first powered flight in 1903. Therefore, the answer to how many years passed before they transitioned from flying a glider to a powered airplane is not directly listed in the options provided, but it is commonly recognized as around four years.
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