William Harper Jr. was a pioneer aviator and aviation engineer with which two American brothers, inventors, and aviation pioneers who are generally credited with inventing, building, and flying the world's first successful airplane?
Wright brothers: The Wright brothers, Orville (August 19, 1871 – January 30, 1948) and Wilbur (April 16, 1867 – May 30, 1912), were two American brothers, inventors, and aviation pioneers who are generally credited with inventing, building, and flying the world's first successful airplane.
i don't know